WO2004112244A1 - 高周波増幅器 - Google Patents
高周波増幅器 Download PDFInfo
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- WO2004112244A1 WO2004112244A1 PCT/JP2003/007426 JP0307426W WO2004112244A1 WO 2004112244 A1 WO2004112244 A1 WO 2004112244A1 JP 0307426 W JP0307426 W JP 0307426W WO 2004112244 A1 WO2004112244 A1 WO 2004112244A1
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- amplifier
- bipolar transistor
- current
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- 230000002194 synthesizing effect Effects 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/18—Indexing scheme relating to amplifiers the bias of the gate of a FET being controlled by a control signal
Definitions
- the present invention relates to a high-frequency amplifier using a bipolar transistor.
- High-frequency amplifiers used in digital mobile phones, etc. are required to have low distortion characteristics in order to prevent interference with adjacent channels. Therefore, high-frequency amplifiers improve the distortion characteristics by compressing the gain of the transistor used for amplification and suppressing phase rotation.
- a diode, a FET, a bipolar transistor, and the like are connected to the transistor of the amplifying element to suppress phase rotation in the entire amplifying circuit, and to compress the gain to compensate for low distortion characteristics.
- FIG. 1 is a configuration diagram showing a conventional high-frequency amplifier.
- This figure shows a two-stage high-frequency amplifier disclosed in Japanese Patent Application Laid-Open No. 10-135750 as an example of a conventional high-frequency amplifier.
- 101 is the front bipolar transistor
- 102 is the rear bipolar transistor
- 103 is the input terminal
- 104 is the input matching circuit of the bipolar transistor 101
- 105 is the constant.
- Current source 106 is power supply voltage terminal
- 107 is interstage matching circuit
- 108 is constant voltage source
- 109 is bipolar transistor 102 output matching circuit
- 110 is RF output Terminal.
- the amplifier circuit is operated, and the base circuit voltage of the bipolar transistor 102 is kept constant to operate the subsequent amplifier circuit.
- the phase rotation generated in the signal amplified by the bipolar transistor 101 of the preceding amplifier circuit is canceled by the phase rotation generated by the bipolar transistor 102 of the subsequent amplifier circuit, and the output from the high-frequency amplifier is output.
- the phase of the amplified signal is suppressed, and the distortion characteristics are improved.
- the present invention has been made to solve the above-described problems, and has a high added efficiency while having a high output and excellent distortion characteristics, and a high frequency amplifier having an improved added efficiency especially at a low output power.
- the purpose is to obtain. It is another object of the present invention to obtain a high-frequency amplifier having improved distortion characteristics and added efficiency while reducing the size. Disclosure of the invention
- the high-frequency amplifier according to the present invention is obtained by parallel-combining a constant-voltage-driven amplifying section using an amplifying element biased at a constant voltage and a constant-current-driven amplifying section using an amplifying element biased at a constant current. It is.
- the high-frequency amplifier according to the present invention includes n (n is an integer of 2 or more) amplifying sections, and the amplifying section has m (m is an integer of 1 or more and n ⁇ 1 or less) constant current driven amplifying sections. It is a combination of n and m constant voltage driven amplifiers in parallel.
- the constant-voltage-driven amplifying unit uses a bipolar transistor as an amplifying element to bias the pace of the bipolar transistor at a constant voltage, and the constant-current-driven amplifying unit includes an amplifying element.
- the base of the bipolar transistor is biased with a constant current by using a bipolar transistor.
- the constant-voltage-driven amplifying unit performs input matching and supplies a constant bias voltage to the amplifying element.
- the input matching constant-voltage bias circuit performs output matching and supplies power to the amplifying element.
- an output matching power supply circuit that supplies the constant current drive amplifier circuit that supplies a constant bias current to the amplification element while performing input matching.
- an output matching power supply circuit for supplying power to the amplifying element.
- the high-frequency amplifier supplies power to a constant-voltage-driven amplifying section and a constant-current-driven amplifying section, and performs output matching of the constant-voltage-driven amplifying section and the constant-current-driven amplifying section.
- the power supply circuit is equipped with a constant voltage drive amplifier, which is equipped with an input matching constant voltage bias circuit that provides input bias and a constant bias voltage to the amplifier element.
- the constant current drive amplifier is equipped with a constant current drive amplifier. It also has an input matching constant current bias circuit that supplies a constant bias current to the amplifying element.
- the number of components constituting the high-frequency amplifier can be reduced, and the size can be reduced.
- a high-frequency amplifier includes: an input matching circuit that performs input matching of a constant-voltage-driven amplifying unit and a constant-current-driven amplifying unit; And an output matching power supply circuit for matching the output of the constant voltage drive amplifier and the constant current drive amplifier.
- the constant voltage drive amplifier supplies a constant bias voltage to the amplifying element.
- the amplifier includes a bias circuit, and the constant-current-driven amplifying unit includes a constant-current bias circuit that supplies a constant bias current to the amplifying element.
- the number of components constituting the high-frequency amplifier can be reduced, and the size can be reduced.
- the amplifying element is configured such that a base of a bipolar transistor that biases at a constant voltage and a base of a bipolar transistor that biases at a constant current are separated on the same chip.
- a bipolar transistor that connects the emitter of a bipolar transistor and a bipolar transistor that biases with a constant current to one emitter pad, and a bipolar pattern that biases with a constant voltage The base lead-out pattern connecting the base of the transistor and the base pad to which a constant bias voltage is supplied, and the base pad to which the bias of the bipolar transistor that biases with a constant current and the constant bias current are supplied.
- a base drawer pattern to be connected is provided, and the base drawer pattern and the emitter drawer pattern are configured to have fewer overlapping portions.
- the constant-voltage-driven amplifying unit uses an FET as an amplifying element and biases the gate of the FET with a constant voltage
- the constant-current-driven amplifying unit uses a bipolar as an amplifying element.
- a transistor is used to bias the base of the bipolar transistor with a constant current.
- FIG. 1 is a configuration diagram showing a conventional high-frequency amplifier.
- FIG. 2A is a circuit diagram showing a high-frequency amplifier according to Embodiment 1 of the present invention.
- FIG. 2B is a diagram showing an example of a specific circuit configuration of the high-frequency amplifier shown in FIG. 2A.
- FIG. 3 is an explanatory diagram showing gain characteristics with respect to input power of the high-frequency amplifier according to the first embodiment.
- FIG. 4 is an explanatory diagram showing distortion characteristics of output power of the high-frequency amplifier according to the first embodiment.
- FIG. 5 is an explanatory diagram showing the additional efficiency of the output power of the high-frequency amplifier according to the first embodiment.
- FIG. 6 is a circuit diagram showing a high-frequency amplifier according to Embodiment 2 of the present invention.
- FIG. 7 is a circuit diagram showing a high-frequency amplifier according to Embodiment 3 of the present invention.
- FIG. 8 is a circuit diagram showing a high-frequency amplifier according to Embodiment 4 of the present invention.
- FIG. 9 is an explanatory diagram showing a configuration of a parallel-transformed bipolar transistor used in a high-frequency amplifier according to Embodiment 5 of the present invention.
- FIG. 2A is a circuit diagram showing a high-frequency amplifier according to Embodiment 1 of the present invention.
- FIG. 2B is a diagram showing an example of a specific circuit configuration of the high-frequency amplifier shown in FIG. 2A.
- reference numeral 1 denotes an amplifier (amplifying section driven by a constant voltage) which is constituted by a bipolar transistor 7 of an amplifying element and a bias circuit and supplies a constant voltage to the base of the bipolar transistor 7 to drive.
- 2 is composed of a bipolar transistor 8 as an amplification element and a bias circuit, etc. This is a pump (a constant current drive amplifier) that supplies a constant current to the base of the polar transistor 8 and drives it.
- 3 is an input terminal
- 4 is an RF output terminal
- A is an amplifier that combines amplifier 1 and amplifier 2 in parallel.
- 7 is a bipolar transistor of an amplifying element constituting amplifier 1
- 8 is a bipolar transistor of an amplifying element constituting amplifier 2
- 9 is a capacitive element mounted on the base of bipolar transistor 7
- 10 is a bipolar transistor.
- 1 is a capacitive element that outputs the output power of amplifier 1 and amplifier 2 to RF output terminal 4, and 1 is a constant-voltage base-bias circuit (constant-voltage bias circuit).
- Reference numeral 13 denotes a constant current base bias circuit (constant current bias circuit).
- Reference numeral 14 denotes a power supply circuit that supplies power to the collector of the bipolar transistor 7 and the collector of the bipolar transistor 8.
- bipolar transistor 7 and the bipolar transistor 8 are formed on the same chip.
- FIG. 3 is an explanatory diagram showing gain characteristics with respect to input power of the high-frequency amplifier according to the first embodiment.
- 15 is a characteristic curve of the gain (Gai ri) with respect to the input power (P in) of the amplifier 1
- 16 is a characteristic curve of the gain with respect to the input power of the amplifier 2
- 17 is a characteristic curve of the amplifier 1 and the amplifier 2.
- 7 is a characteristic curve of gain with respect to input power of amplifier A synthesized in parallel.
- Amplifier 1 has a capacitive element 9 loaded at the base of bipolar transistor 7, and amplifier 2 has a capacitive element 10 loaded at the base of bipolar transistor 8.Therefore, amplifier 1 and amplifier 2 are different from each other. Different bias conditions can be set. Amplifier 1 performs amplification by constant voltage drive, and amplifier 2 performs amplification by constant current drive.
- RF input terminal 3 The input signal is input to the base of the bipolar transistor 7 via the capacitive element 9. At this time, a constant base bias voltage is supplied to the base of the bipolar transistor 7 by the constant voltage base bias circuit 12.
- the power supply circuit 14 supplies power to the collector of the bipolar transistor 7, and the amplified signal is output to the RF output terminal 4 via the capacitive element 11. The emitter of the bipolar transistor 7 is grounded.
- the basic amplification operation of the amplifier 2 will be described.
- the signal input from the RF input terminal 3 is input to the base of the bipolar transistor 8 via the capacitive element 10.
- a constant base bias current is supplied to the base of the bipolar transistor 8 by the constant current base bias circuit 13.
- the power supply circuit 14 supplies power to the collector of the bipolar transistor 8, and the amplified signal is output to the RF output terminal 4 via the capacitive element 11.
- the emitter of the bipolar transistor 8 is grounded.
- the gain characteristic of Amplifier 1 is as shown by the characteristic curve 15 in Fig. 3, and the gain is constant in the range where the magnitude of the input signal is small, that is, in the range where the input power is low, and when the input power increases further. Within a certain range, the gain increases with the input power, and decreases as the input power increases.
- the gain characteristic of the amplifier 2 is represented by a characteristic curve 1 shown in FIG. As shown in Fig. 6, the gain is constant in the range where the input power is low, and The gain decreases as it gets sharper.
- the gain of the amplifier A obtained by combining the amplifier 1 using the constant voltage base bias circuit 12 shown in FIG. 2 and the amplifier 2 using the constant current pace bias circuit 13 in parallel is shown by the characteristic curve 17 shown in FIG. Become like The characteristic curve 17 shows that the gain is constant up to the range where the input power is high and the distortion generated in the output signal is small as compared with the characteristic curves 15 and 16.
- the amplifier 1 that supplies a constant voltage to the base of the bipolar transistor 7 and drives it, and the base of the bipolar transistor 8 (the amplifier 2 that supplies and drives this constant current, Output distortion is reduced, and a constant gain is obtained for a wide range of input power, and a high-frequency amplifier with excellent distortion characteristics can be formed.
- Amplifier A which combines Amplifier 1 and Amplifier 2 in parallel, obtains the input power and gain characteristics as shown by the characteristic curve 17 in Fig. 3, so that the input power of Amplifier 1 ⁇ Adjust the gain characteristics. This takes into account the matching between the saturated output power of amplifier 1 and the saturated output power of amplifier 2, and the matching between the distortion characteristics of amplifier 1 and the distortion characteristics of amplifier 2.
- the transistor size of the amplifying element is adjusted, the transistor size ratio is optimized, and the idle current value of each amplifier is optimized, so that the matching between the amplifier 1 and the amplifier 2 is optimized.
- FIG. 4 is an explanatory diagram showing a distortion characteristic of the output power (P out) of the high-frequency amplifier according to the first embodiment.
- 18 is a distortion characteristic curve of the output power (Pout) of the amplifier 1
- 19 is a distortion characteristic curve of the output power of the amplifier A obtained by combining the amplifier 1 and the amplifier 2 in parallel.
- the required value of the distortion characteristic is specified in the communication system standard.
- the output power (P out) 26.5 dBm
- the adjacent channel power (ACPR) ⁇ Constant to be 3 8 d B c Is being used.
- the amplifier 1 driven by a constant voltage has good distortion characteristics from low output power, and the adjacent channel leakage power is one when the output power is 26.5 dBm.
- a distortion characteristic of 38 dBc is obtained.
- the adjacent channel leakage power is less than 150 dBc, which satisfies the standard requiring less than 38 dBc.
- the distortion characteristic of the amplifier A in which the amplifier 1 having such a distortion characteristic and the amplifier 2 driven at a constant current are combined in parallel is as shown in a distortion characteristic curve 19.
- a distortion characteristic like the distortion characteristic curve 19 is obtained by adjusting and setting the idle current value of the amplifier 1 and the idle current value of the amplifier 2.
- the emitter area AE1 of the bipolar transistor 7 included in the amplifier 1 is set to be larger than the emitter area AE2 of the bipolar transistor 8 included in the amplifier 2 (AE1> AE2 )
- Each transistor size is set, and the base bias voltage V be 1 of the bipolar transistor 7 is set to be larger than the base bias voltage V be 2 of the bipolar transistor 8 (Vb el> Vbe 2).
- Vb el the base bias voltage
- the amplifier that combines the amplifier 1 and the amplifier 2 in parallel The distortion characteristics of A are good as described above. If the idle current value is set low and the constant current drive amplifier 2 and the constant voltage drive amplifier 1 are combined in parallel, a high-frequency amplifier with excellent addition efficiency and excellent addition efficiency can be obtained as described later. Can be
- FIG. 5 shows the output power (P out) of the high-frequency amplifier according to the first embodiment.
- FIG. 6 is an explanatory diagram showing the additional efficiency of the embodiment.
- reference numeral 20 denotes a characteristic curve indicating the added efficiency of the output of the amplifier 1
- 21 denotes a characteristic curve indicating the added efficiency of the output of the amplifier A.
- the characteristics shown in Fig. 5 can be obtained.
- the addition efficiency as shown by the curve 21 is obtained. Comparing the characteristic curves 21 and 20 in Fig. 5, it can be seen that, regardless of the output power, the additional characteristics of amplifier A are better than those of amplifier 1, especially in the range of low output power and saturation output. It can be seen that the added efficiency of pump A is better than that of pump 1 in power. In this way, when the idle current value of the constant current drive amplifier 2 is set low and the idle current value of the constant voltage drive amplifier 1 is set in parallel with this, the distortion characteristics become so disturbing that Can be improved without deteriorating the efficiency.
- the constant voltage drive amplifier 1 and the constant current drive amplifier 2 are combined in parallel, so that the gain can be kept constant up to a high input power range. It has the effect of obtaining a good distortion characteristic.o
- FIG. 6 is a circuit diagram showing a high-frequency amplifier according to Embodiment 2 of the present invention.
- 22 is a bipolar transistor of an amplifying element driven by a constant voltage supplied to the pace
- 23 is a constant transistor supplied to the base.
- Bipolar transistor of amplifying element driven by current 24 is RF input terminal
- 25 is input matching constant voltage bias circuit integrating input matching circuit and constant voltage base bias circuit
- 26 is output matching circuit and power supply
- An output matching power supply circuit integrating the circuit and 27, an input matching constant current bias circuit integrating the input matching circuit and the constant current base bias circuit, and 28 integrating the output matching circuit and the power supply circuit
- Output matching power supply circuit, 29 is RF output terminal
- 30 is a capacitive element loaded on the base of bipolar transistor 22
- 31 is a capacitive element loaded on the base of bipolar transistor 23
- 2 Reference numeral 1 denotes an amplifier (amplifying unit driven by a constant voltage) including a bipolar transistor 22 of an amplifying element, a capacitive element 30, an input matching constant voltage bias circuit 25, and an output matching power supply circuit 26.
- An amplifier (amplifying section driven by a constant current) having a bipolar transistor 23 of the element, a capacitive element 31, an input matching constant current bias circuit 27 and an output matching power supply circuit 28, and B represents an amplifier 20.
- This is an amplifier in which 1 and the amplifier 202 are combined in parallel.
- the high-frequency amplifier according to the second embodiment includes an input matching constant-voltage bias circuit 25 and an output matching power supply circuit 26 in a constant-voltage-driven amplifier 201, and an input to a constant-current-driven amplifier 202. It has a matching constant current bias circuit 27 and an output matching power supply circuit 28.
- Bipolar transistor 22 is equivalent to bipolar transistor 7 shown in FIG. 2, and bipolar transistor 23 is shown in FIG.
- the capacitive element 30 corresponds to the capacitive element 9 shown in FIG. 2
- the capacitive element 31 corresponds to the capacitive element 10 shown in FIG. 2. It is possible to obtain various effects.
- the amplifiers 201 and 202 according to the second embodiment perform operations equivalent to the amplifiers 1 and 2 according to the first embodiment, respectively.
- the emitter area and the idle current value set by the Vbe voltage of the child bipolar transistor can be handled in the same manner as described in the first embodiment.
- the high-frequency amplification operates in the same manner, and the output power distortion characteristics and additional efficiency are also the same.
- the amplifier B according to the second embodiment in which the amplifier 201 and the amplifier 202 are combined in parallel operates in the same manner as the amplifier A in which the amplifier 1 and the amplifier 2 according to the first embodiment are combined in parallel. Since the operation and effect are the same, the description thereof will be omitted, and the characteristic operation of the amplifier 201 and the amplifier 202 of the second embodiment will be described.
- the amplifier 201 matches the signal input from the RF input terminal 24 using the input matching constant voltage bias circuit 25 and inputs the signal to the base of the bipolar transistor 22 via the capacitive element 30. .
- a constant base bias voltage is supplied to the base of the bipolar transistor 22 by the input matching constant voltage bias circuit 25.
- power is supplied from the output matching power supply circuit 26 at the collector of the bipolar transistor 22.
- the signal amplified by the bipolar transistor 22 is output-matched by the output matching power supply circuit 26, and is output to the RF output terminal 29 together with the signal output from the output matching power supply circuit 28.
- the Emitters of Bipolar Transistor 22 are grounded.
- the amplifier 202 performs input matching of the signal input from the RF input terminal 24 using the input matching constant current bias circuit 27, and inputs the signal to the base of the bipolar transistor 23 via the capacitive element 31. .
- a constant base bias current is supplied to the base of the bipolar transistor 23 by the input matching constant current bias circuit 27.
- Power is supplied to the collector of the bipolar transistor 23 by an output matching power supply circuit 28.
- the signal amplified by the bipolar transistor 23 is subjected to output matching by the output matching power supply circuit 28, and the output matching power supply circuit 2 It is output to the RF output terminal 29 together with the output power output from 6.
- the emitter of the bipolar transistor 23 is grounded.
- the input matching constant voltage bias circuit 25 in which the amplifier 201 integrates the input matching circuit and the constant voltage base bias circuit, the output matching circuit, and the power supply circuit are integrated.
- constant-voltage-driven amplifier 201 and the constant-current-driven amplifier 202 are combined in parallel, so that the gain can be kept constant up to a high input power range, and excellent distortion characteristics can be obtained. is there.
- FIG. 7 is a circuit diagram showing a high-frequency amplifier according to Embodiment 3 of the present invention.
- 32 is a bipolar transistor of an amplifier driven by a constant voltage supplied to the base
- 33 is a bipolar transistor of an amplifier driven by a constant current supplied to the base
- 34 is an RF input terminal
- 35 is an input matching constant voltage bias circuit integrating an input matching circuit and a constant voltage base bias circuit
- 36 is an output matching power supply circuit integrating an output matching circuit and a power supply circuit
- 37 is an input matching power supply circuit.
- Constant current base Input matching constant current bias circuit integrated with a bias circuit 38 is an RF output terminal, 39 is a capacitive element loaded on the base of a bipolar transistor 32, and 40 is a base of a bipolar transistor 33
- Capacitors loaded in a single package 301 is an amplifier that amplifies using bipolar transistors 32 (amplifying unit driven by constant voltage)
- 302 is an amplifier that amplifies using bipolar transistors (Constant-current-driven amplifying unit)
- C is an amplifier in which the amplifier 301 and the amplifier 302 are combined in parallel.
- the high-frequency amplifier according to the third embodiment includes an input-matching constant-voltage bias circuit 35 in the constant-voltage driving amplifier 301, and an input-matching constant-current bias circuit 37 in the constant-current driving amplifier 302.
- An output matching power supply circuit 36 that matches the output of the amplifier 301 and the amplifier 302 and supplies the power to the amplifier C, which is a parallel combination of the amplifier 301 and the amplifier 302, is provided. It is a thing.
- the bipolar transistor 32 of the amplifier 301 corresponds to the bipolar transistor 7 shown in FIG. 2, and the bipolar transistor 33 of the amplifier 302 corresponds to the bipolar transistor 8 shown in FIG.
- the element 39 is equivalent to the capacitive element 9 shown in FIG. 2, and the capacitive element 40 is equivalent to the capacitive element 10 shown in FIG. 2. The same operation and effect can be obtained.
- the amplifiers 301 and 302 according to the third embodiment perform operations corresponding to the amplifiers 1 and 2 according to the first embodiment, respectively.
- the amplifier area of the bipolar transistor of the amplifier element and the V The idle current value and the like set by the voltage can be handled in the same manner as described in the first embodiment.
- the high-frequency amplification operates in the same manner, and the output power distortion characteristics and additional efficiency are also the same.
- the amplifier C obtained by synthesizing the amplifier 301 and the amplifier 302 according to the third embodiment in parallel is described in the third embodiment. 1 operates in the same manner as the amplifier A obtained by combining the amplifiers 1 and 2 in parallel with each other, and the operation and effect are also the same. Therefore, the description thereof is omitted, and the amplifier 301 and the amplifier 30 of the third embodiment are omitted.
- the characteristic operation of 2 will be described.
- the amplifier 301 matches the signal input from the RF input terminal 34 using the input matching constant-voltage bias circuit 35, and connects the signal to the base of the bipolar transistor 32 via the capacitive element 39. input. At this time, a constant base bias voltage is supplied to the base of the bipolar transistor 32 by the input matching constant voltage bias circuit 35. In addition, power is supplied to the collector of the pipeliner transistor 32 by an output matching power supply circuit 36. The signal amplified by bipolar transistor 32 is matched with the output signal of bipolar transistor 33 by output matching power supply circuit 36 and output to RF output terminal 38. The emitter of the bipolar transistor is grounded.
- the amplifier 302 matches the signal input from the input terminal 34 using the input matching constant current bias circuit 37 and inputs the signal to the base of the bipolar transistor 33 via the capacitive element 40. At this time, a constant base bias current is supplied to the base of the bipolar transistor 33 by the input matching constant current bias circuit 35. Power is supplied to the collector of the bipolar transistor 33 by the output matching power supply circuit 36, and the signal amplified by the bipolar transistor 33 is supplied to the bipolar transistor 32 by the output matching power supply circuit 36. It is output to RF output terminal 38 after being matched with the output signal of. The emitter of the bipolar transistor 33 is grounded.
- the constant voltage drive amplifier 301 is provided with the input matching constant voltage bias circuit 35 integrated with the input matching circuit and the constant voltage base bias circuit. Input matching to amplifier 302 An input matching constant current bias circuit 37 integrating the circuit and the constant current base bias circuit, and an output matching circuit and an amplifier 301 matching the output power of the amplifiers 301 and 302 are provided.
- the output matching power supply circuit 36 integrated with the power supply circuit for supplying power to the amplifier 302 is provided, so that the number of parts of the high-frequency amplifier can be reduced and the high-frequency amplifier can be downsized. There is an effect that can be.
- the gain can be kept constant up to a high input power range, and excellent distortion characteristics can be obtained. There is an effect that can be.
- the idle current value of the constant current drive amplifier 302 was set low, and the idle current value of the constant voltage drive amplifier 301 was adjusted accordingly. This has the effect that excellent added efficiency can be obtained especially at low output power and saturated output power.
- FIG. 8 is a circuit diagram showing a high-frequency amplifier according to Embodiment 4 of the present invention.
- 41 is a bipolar transistor of an amplifier driven by a constant voltage supplied to the base
- 42 is a bipolar transistor of an amplifier driven by a constant current supplied to the base
- 43 is an RF input.
- 4 4 is a constant voltage base bias circuit (constant voltage bias circuit)
- 4 5 is an output matching power supply circuit integrating the output matching circuit and power supply circuit
- 4 6 is a constant current base bias circuit (constant current bias circuit)
- 4 7 is an RF output terminal
- 48 is an input matching circuit
- 49 is a capacitive element loaded on the base of the bipolar transistor 41
- 50 is a capacitive element loaded on the base of the bipolar transistor 42
- Reference numeral 401 denotes an amplifier (amplifying unit driven by a constant voltage) for performing amplification using the bipolar transistor 41
- reference numeral 402 denotes a bipolar transistor.
- D is an amplifier obtained by combining the amplifier 401 and the amplifier 402 in parallel.
- the high-frequency amplifier according to the fourth embodiment includes a constant-voltage drive amplifier 401 and a constant-voltage base bias circuit 44, and a constant-current drive amplifier 402 and a constant-current base bias circuit 46.
- Power supply power is supplied to the input matching circuit 48 that matches the signals input to the amplifiers 401 and 402, and the power supply to the amplifiers 401 and 402, to the amplifier D, which is a parallel combination of 401 and the amplifier 402.
- the output matching power supply circuit 45 for matching the output signals of the amplifiers 401 and 402 and outputting the signal to the RF output terminal 47 is provided.
- the bipolar transistor 41 of the amplifier 401 corresponds to the bipolar transistor 7 shown in FIG. 2
- the bipolar transistor 42 of the amplifier 402 corresponds to the bipolar transistor 8 shown in FIG. 2
- the capacitive element 49 is In the capacitive element 9 shown in FIG. 2, the capacitive element 50 is equivalent to the capacitive element 1 ° shown in FIG. 2, and the same operation and effect can be obtained.
- the amplifiers 401 and 402 according to the fourth embodiment perform operations corresponding to the amplifiers 1 and 2 according to the first embodiment, respectively.
- the emitter area and the Vbe voltage of the bipolar transistor of the amplifier element The idle current value and the like set by ⁇ ⁇ ⁇ ⁇ can be handled in the same manner as described in the first embodiment.
- the high-frequency amplification operates in the same manner, and the output power distortion characteristics and additional efficiency are also the same.
- the amplifier D according to the fourth embodiment in which the amplifiers 401 and 402 are combined in parallel operates in the same manner as the amplifier A in which the amplifiers 1 and 2 according to the first embodiment are combined in parallel.
- the amplifier 410 constituting the amplifier D biases the signal input from the RF input terminal 43 and matched by the input matching circuit 48 to a constant voltage using the constant voltage base bias circuit 44, and Input to the base of the bipolar transistor 41 via the active element 49.
- power is supplied to the collector of the bipolar transistor 41 by the output matching power supply circuit 45, and the signal amplified by the bipolar transistor 41 is output from the output signal of the bipolar transistor 42 by the output matching power supply circuit 45. Both are matched and output to the RF output terminal 47.
- the grounds of the Standing of the Bipolar Transistor are grounded.
- the amplifier 402 constituting the amplifier D biases the signal input from the RF input terminal 43 and matched by the input matching circuit 48 to a constant current using the constant current base bias circuit 46, and Is input to the base of the bipolar transistor 42 via the conductive element 50.
- power is supplied to the collector of the bipolar transistor 42 by the output matching power supply circuit 45, and the signal amplified by the bipolar transistor 42 is output by the output matching power supply circuit 45 to the output signal of the bipolar transistor 41. Both are matched and output to the RF output terminal 47.
- the bipolar transistor is grounded on the 42nd day.
- the input signal is matched to the amplifier D obtained by synthesizing the constant voltage drive amplifier 401 and the constant current drive amplifier 402 in parallel.
- Supply power to the input matching circuit 48 input to 01 and the amplifier 402 supply power to the amplifier 401 and the amplifier 402, and match the output signals of the amplifier 401 and the amplifier 402. Since the output matching power supply circuit 45 is provided, the number of parts of the high-frequency amplifier can be reduced, and the size of the high-frequency amplifier can be reduced.
- the constant voltage drive amplifier 401 and the constant current drive amplifier 402 are arranged in parallel. Since the columns are combined, the gain can be kept constant up to the range where the input power is high, and there is an effect that excellent distortion characteristics can be obtained.
- FIG. 9 is an explanatory diagram showing a configuration of a parallel-transformed bipolar transistor used in a high-frequency amplifier according to Embodiment 5 of the present invention.
- a plurality of bipolar transistors are formed on the same chip, and a plurality of bases provided on this chip are divided into those driven by a constant voltage and those driven by a constant current.
- 51 is a base pad of a bipolar transistor driven by a constant voltage
- 52 is a base pad of a bipolar transistor driven by a constant current
- 53 is a collector pad that combines the collectors of the bipolar transistors in parallel.
- Reference numeral 54a denotes a base lead-out pattern for connecting the base of a bipolar transistor driven by a constant voltage to the base pad 51
- reference numeral 54b denotes a base of a bipolar transistor driven by a constant current to the base pad 52.
- reference numeral 55 denotes an emitter extraction pattern
- reference numeral 56 denotes a collector extraction pattern
- reference numeral 57 denotes an emitter node for synthesizing the emitter and emitter of each bipolar transistor in parallel.
- the structure shown in FIG. 9 is, for example, configured so that the emitter area ratio between a bipolar transistor driven by a constant voltage and a bipolar transistor driven by a constant current is 2: 1.
- These bipolar transistors are driven by a constant voltage drive using the collector lead-out pattern 56.
- the collectors of the transistor and the bipolar transistor driven at a constant current are connected to one collector pad 53 to combine them, and the bipolar transistor driven at a constant voltage by using the emitter / extractor pattern 55
- Each emitter of the bipolar driven bipolar transistor is connected to one emitter pad 57 for synthesis.
- the emitter of each bipolar transistor is grounded to a ground (not shown) via a via hole (one hole not shown) formed on the emitter pad 57.
- the pace of the voltage-driven bipolar transistor is connected to the base pad 51 by a base lead-out pattern 54a drawn from a part constituting the base.
- the base of the bipolar transistor driven by the constant current is connected to the base pad 52 by a base drawing pattern 54 b drawn from a part constituting the base.
- the base lead-out patterns 54a and 54b and the emitter lead-out pattern 55 should be arranged so as not to overlap as much as possible, and preferably as far apart as possible, so that good high-frequency characteristics can be obtained. I do.
- the base of the bipolar transistor driven by the constant voltage has a constant voltage.
- the base of a bipolar transistor driven by a constant current is biased by a constant current.
- the collector of each bipolar transistor is individually connected. It is configured by connecting to the collector pad provided for the system.
- a bipolar device driven at a constant voltage is used. It is also possible to combine a parallel transistor and a bipolar transistor driven by a constant current and use them in the high-frequency amplifiers described in the first to fourth embodiments.
- a plurality of bipolar transistors are formed on the same chip, and are divided into a base for supplying a constant voltage and a base for supplying a constant current.
- the high-frequency amplifier according to the sixth embodiment is configured by using an FET instead of a bipolar transistor for the amplifying element used for the constant-voltage-driven amplifier of the high-frequency amplifier described in the first to fourth embodiments. .
- an amplification operation is performed in the same manner as that using a bipolar transistor, and the same operation and effect can be obtained.
- a high-frequency amplifier using a bipolar transistor as an amplifying element has been described.However, an HBT made of a compound such as Si BJT, Si Ge BJT, or In G ap is used as an amplifying element. Even similar work Effect is obtained.
- the bipolar transistor driven by the constant voltage base bias and the bipolar transistor driven by the constant current pace bias have been described by way of example in which each is synthesized in parallel.
- the high-frequency amplifier of the present invention is not limited to this.
- the high-frequency amplifier is composed of n (n is an integer of 2 or more) amplifiers (amplifying units), and m (m is an integer of 1 or more and n-1 or less) ) Can be implemented by combining the constant-current-driven amplifier and the n-m constant-voltage-driven amplifier in parallel. With this configuration, the same operation and effect can be obtained. .
- an amplifier driven by a constant voltage and an amplifier driven by a constant current are configured in parallel by using an FET as an amplification element of an amplifier driven by a constant voltage. Therefore, there is an effect that the addition efficiency can be improved while having excellent distortion characteristics.
- the high-frequency amplifier according to the present invention realizes high added efficiency while having excellent distortion characteristics at high output, and is suitable for improving added efficiency at low output power.
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- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Amplifiers (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002024268A JP4130317B2 (ja) | 2002-01-31 | 2002-01-31 | 高周波増幅器 |
US10/520,077 US7161433B2 (en) | 2003-06-11 | 2003-06-11 | High-frequency amplifier |
EP03733370A EP1515434A4 (en) | 2002-01-31 | 2003-06-11 | HIGH FREQUENCY AMPLIFIER |
PCT/JP2003/007426 WO2004112244A1 (ja) | 2002-01-31 | 2003-06-11 | 高周波増幅器 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002024268A JP4130317B2 (ja) | 2002-01-31 | 2002-01-31 | 高周波増幅器 |
PCT/JP2003/007426 WO2004112244A1 (ja) | 2002-01-31 | 2003-06-11 | 高周波増幅器 |
Publications (1)
Publication Number | Publication Date |
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WO2004112244A1 true WO2004112244A1 (ja) | 2004-12-23 |
Family
ID=34219659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/007426 WO2004112244A1 (ja) | 2002-01-31 | 2003-06-11 | 高周波増幅器 |
Country Status (3)
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EP (1) | EP1515434A4 (ja) |
JP (1) | JP4130317B2 (ja) |
WO (1) | WO2004112244A1 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4130317B2 (ja) * | 2002-01-31 | 2008-08-06 | 三菱電機株式会社 | 高周波増幅器 |
US7161433B2 (en) | 2003-06-11 | 2007-01-09 | Mitsubishi Denki Kabushiki Kaisha | High-frequency amplifier |
JP4567577B2 (ja) | 2005-11-08 | 2010-10-20 | 三菱電機株式会社 | 電力増幅器用バイアス回路 |
WO2007080132A2 (en) * | 2006-01-16 | 2007-07-19 | Nxp B.V. | Filter device |
JP4611934B2 (ja) | 2006-05-26 | 2011-01-12 | 三菱電機株式会社 | 電力増幅器用バイアス回路 |
JP4946728B2 (ja) | 2007-08-23 | 2012-06-06 | 三菱電機株式会社 | 電力増幅器 |
JP5194803B2 (ja) * | 2008-01-08 | 2013-05-08 | 三菱電機株式会社 | 電力増幅器 |
US8035443B2 (en) * | 2008-06-20 | 2011-10-11 | Qualcomm, Incorporated | Amplifier with gain expansion stage |
GB2481069B (en) | 2010-06-11 | 2017-06-07 | Snaptrack Inc | Improved crossover performance of power amplifier |
RU2453984C1 (ru) * | 2011-02-22 | 2012-06-20 | Государственное образовательное учреждение высшего профессионального образования "Новосибирский технический университет" | Линейный свч усилитель |
JP6221023B1 (ja) * | 2016-11-29 | 2017-10-25 | 双太 栗林 | 音響発生装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05110349A (ja) * | 1991-10-16 | 1993-04-30 | Matsushita Electric Ind Co Ltd | オーデイオ電力増幅器 |
JPH10135750A (ja) * | 1996-11-01 | 1998-05-22 | Mitsubishi Electric Corp | マイクロ波帯アンプ |
JP2001284984A (ja) * | 2000-03-31 | 2001-10-12 | Hitachi Ltd | 電力増幅器モジュール |
JP2003229728A (ja) * | 2002-01-31 | 2003-08-15 | Mitsubishi Electric Corp | 高周波増幅器 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3868584A (en) * | 1971-02-08 | 1975-02-25 | Henry Richard Beurrier | Amplifier with input and output match |
JPH08307159A (ja) * | 1995-04-27 | 1996-11-22 | Sony Corp | 高周波増幅回路、送信装置、及び受信装置 |
KR100281647B1 (ko) * | 1998-12-01 | 2001-02-15 | 정선종 | 능동소자 발룬을 이용한 소신호 선형성 향상을 위한 알에프 집적회로 |
-
2002
- 2002-01-31 JP JP2002024268A patent/JP4130317B2/ja not_active Expired - Lifetime
-
2003
- 2003-06-11 WO PCT/JP2003/007426 patent/WO2004112244A1/ja active Application Filing
- 2003-06-11 EP EP03733370A patent/EP1515434A4/en not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05110349A (ja) * | 1991-10-16 | 1993-04-30 | Matsushita Electric Ind Co Ltd | オーデイオ電力増幅器 |
JPH10135750A (ja) * | 1996-11-01 | 1998-05-22 | Mitsubishi Electric Corp | マイクロ波帯アンプ |
JP2001284984A (ja) * | 2000-03-31 | 2001-10-12 | Hitachi Ltd | 電力増幅器モジュール |
JP2003229728A (ja) * | 2002-01-31 | 2003-08-15 | Mitsubishi Electric Corp | 高周波増幅器 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1515434A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP1515434A1 (en) | 2005-03-16 |
JP4130317B2 (ja) | 2008-08-06 |
EP1515434A4 (en) | 2006-03-29 |
JP2003229728A (ja) | 2003-08-15 |
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