CN102413303B - Signal generation apparatus and method thereof - Google Patents
Signal generation apparatus and method thereof Download PDFInfo
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- CN102413303B CN102413303B CN201010292084.2A CN201010292084A CN102413303B CN 102413303 B CN102413303 B CN 102413303B CN 201010292084 A CN201010292084 A CN 201010292084A CN 102413303 B CN102413303 B CN 102413303B
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Abstract
The invention provides a signal generation apparatus and a method thereof. The signal generation apparatus comprises an amplifier. The amplifier comprises a differential input terminal used for coupling to a first input signal, a common mode output signal adjusting terminal used for coupling to a second input signal, and an output terminal. The amplifier can generate three or more differential output signals according to the first input signal, generate three or more common mode output signals according to the second input signal, and output an output signal which is formed by one of the differential output signals and one of the common mode output signals at the output terminal.
Description
Technical field
The present invention relates to a kind of signal generation device and method, especially relate to a kind of signal generation device and method of mixing a plurality of signal transmissions.
Background technology
When carrying out the signal transmission, often use different magnitudes of voltage to mean different data, in order to can transmit more information.For example, take the voltage of 0V, 1V, 2V and 3V represents that respectively the data that institute's tendency to develop is sent are 00,01,10 and 11.If wish is used more different magnitude of voltage transmission information, the gap between magnitude of voltage can reduce, and therefore needs the meticulousr hardware of design, and the complexity of hardware and cost are all increased.
In addition, this specific character of many product utilizations is also arranged, transmit after several signals are mixed into to a signal, and can mean with different magnitudes of voltage the data of several signals simultaneously.For example, at high resolution multimedia interface (High Definition Media Interface, HDMI) in, can be by Ethernet channel (HDMI Ethernet Channel, HEC) signal and audio return passage (Audio Return Channel, ARC) signal is mixed into Ethernet audio return channel (HDMI Ethernet and Audio Return Channel, HEAC) signal, thereby can use the HEAC signal to transmit HEC signal and arc signal simultaneously.
The above-mentioned HDMI system of take is example, and common mode is to use respectively different hardware to produce HEC signal and arc signal, re-uses other hardware HEC signal and arc signal are mixed into to the HEAC signal.This mode not only needs to use more hardware and increases cost and consume the more energy, and the integration between each part hardware also can increase complexity.
Therefore, need a kind of signal generation device and method of simplification to solve above-mentioned problem.
Summary of the invention
In order to address the above problem, the invention provides a kind of signal generation device, it includes amplifier, and this amplifier includes the pair of differential input, in order to be coupled to the first input signal; Common mode output signal adjustment end, in order to be coupled to the second input signal; And output.This amplifier can be according to this first input signal, produce the differential output signal more than two, and can be according to this second input signal, produce the common mode output signal more than two, and the output signal formed by one of this differential output signal and one of this common mode output signal in this output output.
The present invention also provides a kind of signal generating method, it comprises provides the common mode output signal adjustment end to amplifier by the first input signal, and provide the pair of differential input to this amplifier by the second input signal, make this output of this amplifier produce the first output signal formed by the first common mode output signal and the first differential output signal; Provide this common mode output signal adjustment end to this amplifier by this first input signal, and provide this differential input terminal to this amplifier by the 3rd input signal, make this output of this amplifier produce the second output signal formed by this first common mode output signal and the second differential output signal; Provide this common mode output signal adjustment end to this amplifier by the 4th input signal, provide this differential input terminal to this amplifier by this second input signal, make this output of this amplifier produce the 3rd output signal formed by the second common mode output signal and this first differential output signal; And provide this common mode output signal adjustment end to this amplifier by the 4th input signal, provide this differential input terminal to this amplifier by the 3rd input signal, make this output of this amplifier produce the 4th output signal formed by this second common mode output signal and this second differential output signal; Wherein this first common mode output signal is different with this second common mode output signal, and this first differential output signal is different with this second differential common mode output signal.
One of advantage of the present invention is to simplify hardware designs, and hardware cost and complexity can be reduced.
The accompanying drawing explanation
Fig. 1 is the functional block diagram after an embodiment of signal generation device of the present invention simplifies;
Fig. 2 is the flow chart of an embodiment of signal generating method of the present invention;
Fig. 3 is the oscillogram of the output signal that produces of the method according to Fig. 2; And
Fig. 4 is the functional block diagram after another embodiment of signal generation device of the present invention simplifies.
Symbol description
100 signal generation device 110,410 amplifiers
132,134,432,434 signal input parts
136 common mode output voltage adjustment end 152,154 power inputs
170,470 output 490 signal adjustment circuits
Embodiment
Below with reference to relevant drawings, embodiments of the invention are described.In these accompanying drawings, identical label means same or similar element or process step.In the middle of specification and follow-up claims, used some vocabulary to censure specific element.Those of ordinary skill in affiliated field should be understood, and may have different nouns and be used for calling same element.This specification and follow-up claims are not usingd the difference of title as the mode of distinguishing element, but using the difference of element on function as the benchmark of distinguishing.In the whole text, in the middle of specification and follow-up claim, be an open term mentioned " comprising ", therefore should be construed to " comprise but be not limited to ... ".In addition, " couple " word comprise any directly with indirectly be connected means.Therefore, be coupled to the second device if describe first device in literary composition, represent that first device can directly connect (comprise by being electrically connected to, the signal connected modes such as wire/wireless transmission or optical delivery) in the second device, or electricity or signal are connected to this second device indirectly by other device or connection means.
Functional block diagram after the signal generation device 100 that Fig. 1 is one embodiment of the invention is simplified, signal generation device 100 can be realized in conjunction with suitable peripheral circuit (not shown) with amplifier 110.Amplifier 110 includes signal input part 132 and 134, common mode output voltage adjustment end 136, power input 152 and 154 and output 170.Amplifier 110 can use operational amplifier (operational amplifier), trsanscondutance amplifier (transconductance amplifier), differential amplifier (differential amplifier) or other suitable amplifier.
Data-signal S1 is coupled to signal input part 132 and 134, and characteristics of signals that can combined data signal S1 arranges the gain parameter G of amplifier 110.For example, when the magnitude of voltage of data-signal S1 hour, absolute value that can gain parameter G is set to be more than or equal to 1, at output 170, to produce suitable differential output voltage.And, when the magnitude of voltage of data-signal S1 is larger, absolute value that can gain parameter G is set to be less than or equal to 1, to produce suitable differential output voltage.
The output voltage V o of the output 170 of amplifier 110 includes differential output voltage G corresponding to data-signal S1 * (Vi1-Vi2), and corresponding to the common mode output voltage Vcm of data-signal S2, so amplifier 110 can produce the output signal that is mixed with data-signal S 1 and S2.
The embodiment of Fig. 1 adopts the amplifier 110 of voltage signal input and voltage signal output, and amplifier 110 adopts differential signal input part 132 and 134, the common mode output voltage adjustment end 136 of single-ended (single ended) and single-ended output 170.In certain embodiments, amplifier also can be according to demand or in conjunction with peripheral circuit, the input of choice for use voltage signal and/or current signal input, single-ended and/or differential signal input and output or select the modes such as voltage signal output and/or current signal output.In further embodiments, also can, according to system requirements, use the peripheral circuit of the signal input appropriate mix of simulation and/or numeral.Therefore, signal generation device of the present invention can have elasticity on hardware designs.
Further illustrate the function mode of signal generation device 100 below with reference to Fig. 2.Flow process Figure 200 of the embodiment that Fig. 2 is signal generating method of the present invention, and the output voltage signal Vo of generation is presented in Fig. 3.
In step 210, the power input of amplifier 110 152 and 154 is coupled to suitable power supply, make amplifier 110 runnings under suitable mode of operation.For example, power input 152 is coupled to the current source of 5V, power input 154 is coupled to earth terminal.
In step 220, data-signal S2 is provided to common mode output voltage adjustment end 136, now data-signal S2 has the first magnitude of voltage.Data-signal S1 is provided to signal input part 132 and 134, and now data-signal S1 is 0, i.e. Vi1=Vi2.As shown in the time t1 of Fig. 3, the output voltage V o=Va of the output 170 of amplifier 110 now.
In step 230, data-signal S2 is fixed as the first magnitude of voltage.Change data-signal S1, with the output 170 at amplifier 110, produce corresponding output voltage V o.For example, in the time of Fig. 3 t2, make data-signal S1=Δ V1, Vi1=Vi2+ Δ V1.The output voltage V o=Va+ Δ V2 of the output 170 of amplifier 110 now.And in the time of Fig. 3 t3, make data-signal S1=2 * Δ V1, Vi1=Vi2+2 * Δ V1.The output voltage V o=Va+2 of the output 170 of amplifier 110 * Δ V2 now.In addition, can be according to demand, Δ V1 and Δ V2 are set to identical or different value.
In step 240, data-signal S2 is set to the second voltage value, and data-signal S1 is 0.As shown in the time t4 of Fig. 3, the output voltage V o=Vb of the output 170 of amplifier 110 now.
In step 250, data-signal S2 is fixed as the second voltage value.And change data-signal S1, with the output 170 at amplifier 110, produce corresponding output voltage V o.For example, in the time of Fig. 3 t5, make data-signal S1=Δ V1, Vi1=Vi2+ Δ V1.The output voltage V o=Vb+ Δ V2 of the output 170 of amplifier 110 now.And in the time of Fig. 3 t6, make data-signal S1=2 * Δ V1, Vi1=Vi2+2 * Δ V1.The output voltage V o=Vb+2 of the output 170 of amplifier 110 * Δ V2 now.
The embodiment of Fig. 2 and Fig. 3, only how simple description will have the data-signal S1 and the data-signal S2 mixing with two magnitudes of voltage of three magnitudes of voltage, with the output 170 at amplifier 110, produce the output voltage signal Vo that is mixed with data-signal S1 and S2.In certain embodiments, also can use the not coordination of a signal as data-signal S1 and S2, for example, signal T comprises 3 positions (T0, T1, T2), and mean this 3 positions with 8 magnitudes of voltage, now according to the flow process of Fig. 2, use position T0 as data-signal S1, use position T1 and T2 as data-signal S2, to produce the output signal of needed 8 magnitudes of voltage.
In the above-described embodiment, output signal, data-signal S1 and S2 are that the voltage signal with discrete (discrete) means, in other embodiment, output signal and data-signal can adopt voltage signal and/or current signal discrete or continuous (continuous).For example, data-signal S1 and S2 can adopt continuous string ripple, triangular wave and/or square wave etc.In addition, output signal and data-signal can adopt on the occasion of and/or voltage signal and/or the current signal of negative value.
Signal generation device of the present invention and method can also have other variation and execution mode, for example, in one embodiment, although in Fig. 3, output voltage V o is six different magnitudes of voltage, but also can some magnitude of voltage be set to identically, for example make Va+2 * Δ V2=Vb.In another embodiment, can use the arrange in pairs or groups data-signal S2 of two or more magnitudes of voltage of the data-signal S1 with two or more magnitudes of voltage, be mixed with the output signal of data-signal S1 and S2 with generation.In another embodiment, can the viewing system demand, at some time transmission of data signals S1 only, at some time transmission of data signals S2 only, and at some while time transmission of data signals S1 and S2, and, when the data-signal of transmission of data signals S1, data-signal S2 and mixing S1 and S2, also can make the output 170 of amplifier 110 produce corresponding output voltage V o according to different data-signals.In another embodiment, data-signal S1 and data-signal S2 also can change simultaneously, and do not need once only changing a data-signal in the embodiment of similar Fig. 2.
Signal generation device of the present invention and method can also the binding signal coding/decoding methods and more execution mode are arranged.For example, can be by above-mentioned HDMI system, (the Multi Level Transmit through multistage transmission-3, MLT-3) the HEC signal of coding is as data-signal S1, using arc signal as data-signal S2, and data-signal S1 and S2 are provided to amplifier 110, to produce the HEAC signal, or produce differential HEAC+ signal and HEAC-signal.
Signal generation device of the present invention also can coordinate suitable peripheral circuit, and more flexible hardware designs is provided.For example, in above-mentioned HDMI system, if can't directly use HEC signal or arc signal as data-signal S1 and S2, need to use some peripheral circuits that HEC signal or arc signal are converted to suitable voltage or current level, then the signal after conversion is coupled to amplifier 110.For example, the functional block diagram after the signal generation device 400 that Fig. 4 is another embodiment of the present invention is simplified, except the amplifier 110 of Fig. 1, signal generation device 400 also includes amplifier 410 and signal adjustment circuit 490.The homophase differential wave input 432 of amplifier 410 is coupled to signal adjustment circuit 490, the anti-phase differential wave input 434 of amplifier 410 is coupled to the output 170 of amplifier 110, and the output 470 of amplifier 410 is coupled to the common mode output voltage adjustment end 136 of amplifier 110.For for purpose of brevity, the power input of amplifier 410 is not drawn in the drawings.
In the embodiment of Fig. 4, arc signal is coupled to signal adjustment circuit 490, and arc signal is converted to after suitable voltage level Vm to provide to anti-phase differential wave input 434.For example, signal adjustment circuit 490 can be used bleeder circuit, by the arc signal dividing potential drop, is suitable voltage level, and bleeder circuit can utilize the realizations such as active element and passive component.
Therefore, when the output voltage V o of the output 170 of amplifier 110 is greater than Vm, the output voltage of the output 470 of amplifier 410 (the voltage Vi3 at 136 places is held in the common mode output voltage adjustment that is amplifier 110) can descend, and the output voltage V o of the output 170 of amplifier 110 is descended.When if the output voltage V o of the output 170 of amplifier 110 is less than Vm, the output voltage of the output 470 of amplifier 410 can rise, and makes the output voltage V o of the output 170 of amplifier 110 increase.Therefore, the embodiment in Fig. 4 can be converted to arc signal the acceptable voltage level of amplifier 110, makes the output 170 of amplifier 110 produce required common mode output voltage.In a further embodiment, also can use other suitable circuit, the HEC signal is converted to the acceptable voltage level of amplifier 110, make amplifier 110 can produce required differential output voltage.
The foregoing is only the preferred embodiments of the present invention, all equalizations of doing according to the claims in the present invention book change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. a signal generation device, include one first amplifier, and described the first amplifier includes:
A pair of the first differential input terminal, in order to be coupled to one first input signal;
One common mode output signal adjustment end, in order to be coupled to one second input signal; And
One first output;
Wherein said the first amplifier can be according to described the first input signal, produce plural differential output signal, and can be according to described the second input signal, produce plural common mode output signal, and one first output signal formed by one of described plural differential output signal and one of described plural common mode output signal in described the first output output.
2. signal generation device according to claim 1, also include one second amplifier, and described the second amplifier includes:
Mutually differential signal input part together, be coupled to described first output of described the first amplifier;
One anti-phase differential wave input, be coupled to described the second input signal; And
One second output, be coupled to the described common mode output signal adjustment end of described the first amplifier, and described the second amplifier, according to described the second input signal and described the first output signal, produces one second output signal at described common mode output signal adjustment end.
3. signal generation device according to claim 2, wherein, described the second input signal also is coupled to the described anti-phase differential wave input of described the second amplifier by a bleeder circuit.
4. signal generation device according to claim 2, wherein, described the first input signal, described the second input signal, described the first output signal, described the second output signal, described differential output signal and described common mode output signal are selected respectively voltage form and/or current forms.
5. signal generation device according to claim 1, wherein, described the first input signal, described the second input signal, described the first output signal, described differential output signal and described common mode output signal are selected respectively voltage form and/or current forms.
6. signal generation device according to claim 1, wherein, described the first amplifier comprises a differential amplifier, an operational amplifier or a trsanscondutance amplifier.
7. a signal generating method, it includes:
Provide the common mode output signal adjustment end to one first amplifier by one first input signal, and provide the pair of differential input to described the first amplifier by one second input signal, make described first output of described the first amplifier produce one first output signal formed by one first common mode output signal and one first differential output signal;
Provide the described common mode output signal adjustment end to described the first amplifier by described the first input signal, and provide the described differential input terminal to described the first amplifier by one the 3rd input signal, make described first output of described the first amplifier produce one second output signal formed by described the first common mode output signal and one second differential output signal;
Provide the described common mode output signal adjustment end to described the first amplifier by one the 4th input signal, provide the described differential input terminal to described the first amplifier by described the second input signal, make described first output of described the first amplifier produce one the 3rd output signal formed by one second common mode output signal and described the first differential output signal; And
Provide the described common mode output signal adjustment end to described the first amplifier by described the 4th input signal, provide the described differential input terminal to described the first amplifier by described the 3rd input signal, make described first output of described the first amplifier produce one the 4th output signal formed by described the second common mode output signal and described the second differential output signal;
Wherein, described the first common mode output signal is different with described the second common mode output signal, and described the first differential output signal is different with the described second differential common mode output signal.
8. signal generating method according to claim 7, also comprise and provide the described common mode output signal adjustment end to described the first amplifier by described the first input signal and described the 4th input signal by one second amplifier, wherein said the second amplifier includes together mutually differential signal input part, in order to be coupled to described the first output; One anti-phase differential wave input, in order to be coupled to described the first input signal and described the 4th input signal; And one second output, in order to be coupled to the described common mode output signal adjustment end of described the first amplifier.
9. signal generating method according to claim 8, also comprise and provide the described anti-phase differential wave input to described the second amplifier by described the first input signal and described the 4th input signal by a bleeder circuit.
10. signal generating method according to claim 7, wherein, described the first input signal, the second input signal, the 3rd input signal and the 4th input signal, described the first common mode output signal and the second common mode output signal and described the first differential output signal and the second differential output signal are selected respectively voltage form and/or current forms.
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| CN201010292084.2A CN102413303B (en) | 2010-09-21 | 2010-09-21 | Signal generation apparatus and method thereof |
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| CN201010292084.2A CN102413303B (en) | 2010-09-21 | 2010-09-21 | Signal generation apparatus and method thereof |
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| CN102413303B true CN102413303B (en) | 2014-01-08 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1452314A (en) * | 2002-04-12 | 2003-10-29 | 旺宏电子股份有限公司 | Automatic track feedback circuit and high-speed A/D converter therewith |
| CN1805272A (en) * | 2005-01-14 | 2006-07-19 | 瑞昱半导体股份有限公司 | Circuit apparatus with different common mode I/O voltage |
| EP1688750A1 (en) * | 2005-02-04 | 2006-08-09 | Tektronix, Inc. | Differential termination and attenuator network for a measurement probe having an automated common mode termination voltage generator |
| CN101313468A (en) * | 2005-11-21 | 2008-11-26 | 松下电器产业株式会社 | Fully differential comparator and fully differential amplifier |
-
2010
- 2010-09-21 CN CN201010292084.2A patent/CN102413303B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1452314A (en) * | 2002-04-12 | 2003-10-29 | 旺宏电子股份有限公司 | Automatic track feedback circuit and high-speed A/D converter therewith |
| CN1805272A (en) * | 2005-01-14 | 2006-07-19 | 瑞昱半导体股份有限公司 | Circuit apparatus with different common mode I/O voltage |
| EP1688750A1 (en) * | 2005-02-04 | 2006-08-09 | Tektronix, Inc. | Differential termination and attenuator network for a measurement probe having an automated common mode termination voltage generator |
| CN101313468A (en) * | 2005-11-21 | 2008-11-26 | 松下电器产业株式会社 | Fully differential comparator and fully differential amplifier |
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