CN103684262B - A kind of sinusoidal wave quartz oscillator based on analog circuit - Google Patents
A kind of sinusoidal wave quartz oscillator based on analog circuit Download PDFInfo
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- CN103684262B CN103684262B CN201310714319.6A CN201310714319A CN103684262B CN 103684262 B CN103684262 B CN 103684262B CN 201310714319 A CN201310714319 A CN 201310714319A CN 103684262 B CN103684262 B CN 103684262B
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Abstract
The present invention relates to a kind of sinusoidal wave quartz oscillator based on analog circuit. This oscillator is made up of a frequency loop and an amplitude loop. Frequency loop comprises quartz crystal, current amplifier and adjustable voltage amplifier, and meeting loop phase is the starting condition for oscillation of 2n π (n is integer), to realize the control to oscillator frequency. Amplitude loop comprises magnitude demodulator device, integrator and controlled current source, thereby amplitude loop makes on the one hand frequency loop shorten Induction Peried in the loop gain in starting of oscillation stage much larger than 1, after starting of oscillation, make on the other hand the loop gain of frequency loop equal 1 and be operated in sinusoidal wave state. The driving signal of quartz oscillator of the present invention is sinusoidal wave, has avoided the impact of square wave higher hamonic wave on quartz crystal and adjacent oscillating circuit; Have advantages of simple in structure, low in energy consumption, be easy to realize, and can avoid the interference of clock signal in digital circuit.
Description
Technical field
The present invention relates to a kind of quartz oscillator, particularly, relate to a kind of sinusoidal wave quartz oscillator based on analog circuit.
Background technology
Quartz oscillator can be applicable to the multiple sensors such as angular speed, angular acceleration, pressure, temperature, have that quality factor are high, frequency stability good, reproducible, sluggish little, time the advantage such as stability good, anti-corrosion resistance to radiation, good manufacturability, cost low, suitable batch production.
In the past, there were US5487015A and US5047734A about the patent of sinusoidal wave crystal oscillator. Patent US5487015A has proposed a kind of quartz oscillator based on Digital Signal Processing, the major defect of this scheme is that algorithm complexity, hardware requirement are high, circuit volume and power consumption large, the sine wave of its generation is obtained through LPF by staircase waveform in addition, still has a large amount of harmonic components. Patent US5047734 has proposed a kind of sinusoidal wave crystal oscillator based on analog multiplier, and this scheme still has circuit complexity, high, the bulky shortcoming of power consumption.
Summary of the invention
The technical problem to be solved in the present invention is the shortcoming for former sine wave oscillation circuit, proposes a kind of sinusoidal wave quartz oscillator based on analog circuit. That this quartz oscillator has is simple in structure, low in energy consumption, volume is little, without advantages such as high-frequency harmonics.
The technical scheme that the present invention solves the problems of the technologies described above comprises:
A kind of sinusoidal wave quartz oscillator based on analog circuit, comprise frequency loop and amplitude loop, wherein frequency loop comprises quartz crystal, current amplifier and adjustable voltage amplifier, the input of current amplifier is connected with the first end of quartz crystal, be voltage by the current conversion of the quartz crystal of flowing through, its output is connected with an input of adjustable voltage amplifier; The output of adjustable voltage amplifier is connected with the second end of quartz crystal, by after-applied on quartz crystal the voltage scaling of current amplifier output; And amplitude loop comprises magnitude demodulator device, integrator and controlled current source, the input of magnitude demodulator device is connected to the output of current amplifier, and the AC signal of received current amplifier also converts it into the direct current signal that can reflect AC signal amplitude; The input of integrator is connected with the output of magnitude demodulator device, and the direct current signal to the output of magnitude demodulator device and the voltage reference signal of setting carry out integration; The output of integrator is connected with the input of controlled current source, with the ability of its output voltage signal control controlled current source output current; The output of controlled current source is connected to another input of adjustable voltage amplifier, with the multiplication factor of its output current control adjustable voltage amplifier.
Preferably, current amplifier comprises the first resistance, the first electric capacity and the first operational amplifier, and wherein, the first resistance and the first Capacitance parallel connection are connected on the reverse input end and output of the first operational amplifier; The reverse input end of the first operational amplifier is connected with the first end of quartz crystal, it is input end grounding in the same way, and the reverse input end of the first operational amplifier is as the input of current amplifier, and the output of the first operational amplifier is as the output of current amplifier.
Preferably, magnitude demodulator device comprises the second operational amplifier, the second resistance, the 3rd resistance, the first diode and the second diode, wherein, the anode tap of the first diode is connected to the reverse input end of the second operational amplifier, and its cathode terminal is connected to the output of the second operational amplifier; One end of the 3rd resistance is connected to the reverse input end of the second operational amplifier, and the other end is connected to the cathode terminal of the second diode, and the anode tap of the second diode is connected to the output of the second operational amplifier; One end of the second resistance is connected to the output of current amplifier as the input of magnitude demodulator device, the other end is connected to the reverse input end of the second operational amplifier; The input end grounding in the same way of the second operational amplifier, and its output is as the output of magnitude demodulator device.
Preferably, integrator comprises the 3rd operational amplifier, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 3rd diode, the second electric capacity and the 3rd electric capacity, wherein, one end of the 5th resistance is connected to the output of magnitude demodulator device as the input of integrator, the other end is connected to the reverse input end of the 3rd operational amplifier; The two ends of the 3rd electric capacity connect respectively reverse input end and the input of the 3rd operational amplifier; One end of the 7th resistance is connected to the reverse input end of the 3rd operational amplifier, and the other end connects one end of the second electric capacity, and the other end of the second electric capacity is connected to the output of operational amplifier; The cathode terminal of the 3rd diode and anode tap are connected respectively reverse input end and the output of the 3rd operational amplifier; The two ends of the 6th resistance connect respectively the 3rd reverse input end of operational amplifier and the output of current amplifier; One end of the 4th resistance is connected with voltage-reference, and the other end is connected to the reverse input end of the 3rd operational amplifier; And the input end grounding in the same way of operational amplifier, and its output is as the output of integrator.
Preferably, controlled current source adopts N channel junction field-effect pipe, and its grid connects the output of integrator, source ground, and drain electrode connects another input of adjustable voltage amplifier.
Preferably, adjustable voltage amplifier comprises four-operational amplifier, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance and the 12 resistance, wherein, one end of the 8th resistance and the 9th resistance is all connected to the output of current amplifier, the other end of the 8th resistance is connected to the input in the same way of four-operational amplifier, and the other end of the 9th resistance is connected to the reverse input end of four-operational amplifier; One end ground connection of the 11 resistance, the other end is connected to the reverse input end of four-operational amplifier; The two ends of the 12 resistance are connected to respectively reverse input end and the output of four-operational amplifier; The two ends of the tenth resistance connect respectively input in the same way and the ground connection of four-operational amplifier; The input in the same way of four-operational amplifier is connected to the output of controlled current source, and its output is connected to the second end of quartz crystal.
Preferably, integrator comprises the 3rd operational amplifier, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the second electric capacity and the 3rd electric capacity, wherein, one end of the 5th resistance is connected to the output of magnitude demodulator device as the input of integrator, the other end is connected to the reverse input end of the 3rd operational amplifier; The two ends of the 3rd electric capacity connect respectively reverse input end and the input of the 3rd operational amplifier; One end of the 7th resistance is connected to the reverse input end of the 3rd operational amplifier, and the other end connects one end of the second electric capacity, and the other end of the second electric capacity is connected to the output of operational amplifier; The two ends of the 6th resistance connect respectively the 3rd reverse input end of operational amplifier and the output of current amplifier; One end of the 4th resistance is connected with voltage-reference, and the other end is connected to the reverse input end of the 3rd operational amplifier; And the input end grounding in the same way of operational amplifier, and its output is as the output of integrator; And controlled current source comprises N channel junction field-effect pipe and the 4th diode, wherein, the anode tap of the 4th diode is connected to the grid of N channel junction field-effect pipe, its cathode terminal ground connection; The output of the grid integrator of N channel junction field-effect pipe, source ground, drain electrode connects another input of adjustable voltage amplifier.
Preferably, integrator comprises the 3rd operational amplifier, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the second electric capacity and the 3rd electric capacity, wherein, one end of the 5th resistance is connected to the output of magnitude demodulator device as the input of integrator, the other end is connected to the reverse input end of the 3rd operational amplifier; The two ends of the 3rd electric capacity connect respectively reverse input end and the input of the 3rd operational amplifier; One end of the 7th resistance is connected to the reverse input end of the 3rd operational amplifier, and the other end connects one end of the second electric capacity, and the other end of the second electric capacity is connected to the output of operational amplifier; The two ends of the 6th resistance connect respectively the 3rd reverse input end of operational amplifier and the output of current amplifier; One end of the 4th resistance is connected with voltage-reference, and the other end is connected to the reverse input end of the 3rd operational amplifier; And the input end grounding in the same way of operational amplifier, and its output is as the output of integrator; And controlled current source is N channel enhancement metal-oxide-semiconductor, the grid of N channel enhancement metal-oxide-semiconductor connects the output of integrator, source electrode and substrate ground connection, and drain electrode connects another input of adjustable voltage amplifier.
Preferably, sinusoidal wave quartz oscillator also comprises C0Compensating circuit, C0Compensating circuit comprises the 5th operational amplifier, the 13 resistance, the 14 resistance and building-out capacitor, and wherein, one end of building-out capacitor is connected to the first end of quartz crystal, and the other end of building-out capacitor connects the output of the 5th operational amplifier; The reverse input end of the 5th operational amplifier is connected to the second end of quartz crystal by the 13 resistance, it is input end grounding in the same way; The two ends of the 14 resistance connect respectively reverse input end and the output of the 5th operational amplifier.
Sinusoidal wave quartz oscillator based on analog circuit according to the present invention possesses useful technique effect:
The present invention is based on analog circuit, formed by a frequency loop and an amplitude loop. Frequency loop is by quartz crystal, current amplifier and adjustable voltage amplifier is end to end is in series, and meeting loop phase is the starting condition for oscillation of 2n π (n is integer), to realize the control to oscillator frequency. Amplitude loop is made up of magnitude demodulator device, integrator and controlled current source, the AC signal of magnitude demodulator device received current amplifier also converts it into the direct current signal that can react AC signal amplitude, integrator carries out integration to this direct current signal and a reference signal, the output signal of integrator can be controlled the ability of the output current of controlled current source, thereby realizes the control to adjustable voltage amplifier. Thereby amplitude loop makes on the one hand frequency loop shorten Induction Peried in the loop gain in starting of oscillation stage much larger than 1, after oscillator signal is stable, make on the other hand the loop gain of frequency loop equal 1 and be operated in sinusoidal wave state. Thereby that the sinusoidal wave quartz oscillator based on analog circuit according to the present invention has advantages of is simple in structure, low in energy consumption, volume is little, be easy to realize, and can avoid the interference of clock signal in digital circuit.
In addition, sinusoidal wave owing to adopting, thus avoid the impact of square wave higher hamonic wave on quartz crystal and adjacent oscillating circuit.
Brief description of the drawings
Fig. 1 is according to the quartz crystal of the sinusoidal wave quartz oscillator based on analog circuit of the present invention and circuit equivalent model schematic diagram thereof;
Fig. 2 shows the admittance circle of quartz crystal;
Fig. 3 is according to the theory diagram of the sinusoidal wave quartz oscillator based on analog circuit of the present invention;
Fig. 4 is according to the schematic diagram of the sinusoidal wave quartz oscillator based on analog circuit of the present invention specific embodiment;
Fig. 5 is the schematic diagram of a kind of modified embodiment of the quartz oscillator shown in Fig. 4;
Fig. 6 be the quartz oscillator shown in Fig. 4 another this enter the schematic diagram of embodiment; And
Fig. 7 is according to band C of the present invention0The schematic diagram of the quartz crystal sine-wave oscillator of compensation.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the sinusoidal wave quartz oscillator based on analog circuit according to the present invention is further described in detail.
Fig. 1 shows quartz crystal 1 and circuit equivalent model 2 thereof. One route dynamic electric resistor R of this circuit equivalent illustraton of model1, dynamic capacity C1, dynamic inductance L1Be in series, be called series arm. Dynamic capacity C wherein1With dynamic inductance L1Size, density, piezoelectric constant and elastic constant by quartz crystal determine, dynamic electric resistor R1Reflect the size of quartz crystal mechanical loss. Shunt capacitance C0Being in parallel with series arm, is the interelectrode electrostatic capacitance of quartz crystal. The present invention is applicable to all quartz oscillators that can be equivalent to circuit equivalent model 2.
Fig. 2 shows the admittance circle of quartz crystal 1. The admittance of the circuit equivalent model 2 of quartz crystal 1 is as shown in formula (1) below.
Wherein, G is that electricity is led, and B is susceptance, and ω is angular frequency, R1、L1、C1、C0Be respectively dynamic electric resistor, dynamic inductance, dynamic capacity, the electrostatic capacitance of quartz crystal, j is imaginary unit.
Selecting electricity to lead G is abscissa, and susceptance B is ordinate, and admittance Y is a circle with the variation track of frequency, is called admittance circle. This admittance diameter of a circle and dynamic electric resistor R1Be inversely proportional to, the center of circle is from distance and the shunt capacitance C of transverse axis0Be directly proportional. Due to shunt capacitance C0Existence, the resonant frequency of quartz crystal has been separated into minimum impedance frequency fm, series resonance frequency fsWith zero phase resonant frequency fr. Point defection of resonant frequency causes the drift of oscillating loop resonant frequency point, is zero phase resonant frequency not time when admittance circle and transverse axis do not have intersection point, and oscillating loop even cannot starting of oscillation. Work as C0Less, when its impact can be ignored, can directly the design be applied to quartz oscillator; Work as C0When very large, the design can integrate C easily0Compensating circuit, makes admittance circle again crossing with transverse axis, thereby ensures the normal work of oscillator.
Fig. 3 is according to the theory diagram of the sinusoidal wave quartz oscillator based on analog circuit of the present invention. This sine wave quartz oscillator comprises a frequency loop 3 and an amplitude loop 4. Frequency loop 3 comprises quartz crystal 1, current amplifier 5 and adjustable voltage amplifier 6. One end of the input of current amplifier 5 and quartz crystal 1 joins, and is voltage by the current conversion of the quartz crystal 1 of flowing through, and the input of its output and adjustable voltage amplifier 6 joins. The other end of the output of adjustable voltage amplifier 6 and quartz crystal 1 joins, by after-applied on quartz crystal 1 voltage scaling of current amplifier output. Frequency loop 3 meets the starting condition for oscillation that loop phase is 2n π (n is integer), and another starting condition for oscillation to be loop gain be greater than 1 is met by amplitude loop 4. Amplitude loop 4 comprises magnitude demodulator device 7, integrator 8 and controlled current source 9. The output of the input of magnitude demodulator device 7 and current amplifier 5 joins, and the AC signal of received current amplifier 5 also converts it into the direct current signal that can reflect AC signal amplitude. The output of the input of integrator 8 and magnitude demodulator device 7 joins, and the direct current signal that magnitude demodulator device 7 is exported and a reference signal are carried out integration. The output of integrator 8 and the input of controlled current source join, with the ability of its output voltage signal control controlled current source 9 output currents. Another input of the output of controlled current source 9 and adjustable voltage amplifier 6 joins, with the multiplication factor of the size control adjustable voltage amplifier 6 of its output current. Amplitude loop on the one hand makes the multiplication factor of adjustable voltage amplifier 6 much larger than 1 in the starting of oscillation stage, and therefore the loop gain of frequency loop is much larger than 1, thereby shortened Induction Peried; After starting of oscillation, make the loop gain of frequency loop 3 be constantly equal to 1 by the multiplication factor that regulates adjustable voltage amplifier 6 on the other hand, thereby ensure that frequency loop 3 each points are all operated in sinusoidal wave state.
Fig. 4 is a kind of specific embodiment of the quartz crystal sine-wave oscillator shown in Fig. 3.
The two ends of the first resistance 11 and the first electric capacity 12 join with reverse input end and the output of the first operational amplifier 10 respectively, form current amplifier 5, and this reverse input end of the first operational amplifier 10 and one end of quartz crystal 1 join.
The second operational amplifier 13, the second resistance 14, the 3rd resistance 15, the first diode 16 and the second diode 17 form magnitude demodulator device, wherein one end of resistance 14 joins as the input of magnitude demodulator device 7 and the output of operational amplifier 10, receive sine wave signal and be translated into half-wave voltage signal, the other end is connected to the reverse input end of the second operational amplifier 13. The input end grounding in the same way of the second operational amplifier 13, and its output is as the output of magnitude demodulator device 7. The anode tap of the first diode 16 is connected to the reverse input end of the second operational amplifier 13, and its cathode terminal is connected to the output of the second operational amplifier 13. One end of the 3rd resistance 15 is connected to the reverse input end of the second operational amplifier 13, and the other end is connected to the cathode terminal of the second diode 17, and the anode tap of the second diode 17 is connected to the output of the second operational amplifier 13.
The integrator that the 3rd operational amplifier 18, the 4th resistance 19, the 5th resistance 20, the 6th resistance 21, the 7th resistance 22, the 3rd diode 23, the second electric capacity 24 and the 3rd electric capacity 25 form with lead-lag link, wherein, one end and the voltage-reference of the 4th resistance 19 join, and the other end is connected to the reverse input end of the 3rd operational amplifier 18. One end of the 5th resistance 20 joins with the cathode terminal of the second diode 17 of the output as magnitude demodulator device 7, and the other end is connected to the reverse input end of the 3rd operational amplifier 18. The two ends of the 3rd electric capacity 25 connect respectively reverse input end and the input of the 3rd operational amplifier 18. One end of the 7th resistance 22 is connected to the reverse input end of the 3rd operational amplifier 18, and the other end connects one end of the second electric capacity 24. The other end of the second electric capacity 24 is connected to the output of operational amplifier 18. The cathode terminal of the 3rd diode 23 and anode tap are connected respectively reverse input end and the output of the 3rd operational amplifier 18. The input end grounding in the same way of operational amplifier 18, and its output is as the output of integrator 8. One end of resistance 21 connects the reverse input end of the 3rd operational amplifier 18, and the output of the other end and the operational amplifier 10 of the output as current amplifier 5, with to the common integration of d. c. voltage signal, half-wave voltage signal and sine wave signal.
Controlled current source 9 adopts N channel junction field-effect pipe 26. Its grid is connected the 3rd operational amplifier 18 of the output of integrator 8 output with conduct connects, source ground, and drain electrode connects another input of adjustable voltage amplifier 6.
Four-operational amplifier 27, the 8th resistance 28, the 9th resistance 29, the tenth resistance the 30, the 11 resistance the 31 and the 12 resistance 32 form adjustable voltage amplifier 6. Wherein, one end of the 8th resistance 28 and the 9th resistance 29 is all connected to the output as the operational amplifier 10 of the output of current amplifier 5, the other end of the 8th resistance 28 is connected to the input in the same way of four-operational amplifier 27, and the other end of the 9th resistance 29 is connected to the reverse input end of four-operational amplifier 27. One end ground connection of the 11 resistance 31, the other end is connected to the reverse input end of four-operational amplifier 27. The two ends of the 12 resistance 32 are connected to respectively reverse input end and the output of four-operational amplifier 27. The two ends of the tenth resistance 30 connect respectively input in the same way and the ground connection of four-operational amplifier 27. The drain electrode of the input in the same way of four-operational amplifier 27 and N channel junction field-effect pipe 26 joins to be subject to it to control, and its output is connected with the second end of quartz crystal, forms frequency loop with current amplifier 5.
Fig. 5 is a kind of improvement project of quartz oscillator shown in Fig. 4. Impact for the leakage current of diode in scheme shown in Fig. 4 on amplitude loop, has removed the 3rd diode 23. Increased by the 4th diode 33 as protection diode in the input stage of N channel junction field-effect pipe 26, the anode tap of the 4th diode 33 is connected to the grid of N channel junction field-effect pipe 26, its cathode terminal ground connection.
Fig. 6 be quartz crystal sine-wave oscillator shown in Fig. 4 another kind this enter implementation. Impact for the leakage current of diode in scheme shown in Fig. 4 on amplitude loop, has removed the 3rd diode 23. Change N channel junction field-effect pipe 26 into N channel enhancement metal-oxide-semiconductor 34. The grid of this N channel enhancement metal-oxide-semiconductor 34 connects the output as the 3rd operational amplifier 18 of the output of integrator 8, source electrode and substrate ground connection, and drain electrode connects another input of adjustable voltage amplifier 6.
Fig. 7 is band C0The quartz crystal sine-wave oscillator of compensation. Do not have intersection point there is no the quartz crystal of zero phase resonant frequency for admittance circle and transverse axis, the loop phase shift of frequency loop 3 does not meet 2n π, must add C0Compensating circuit. This scheme has increased by the 5th operational amplifier the 35, the 13 resistance the 36, the 14 resistance 37 and building-out capacitor C compared with scheme shown in Fig. 4C38. Wherein, the 5th operational amplifier the 35, the 13 resistance the 36, the 14 resistance 37 forms sign-changing amplifier, and the output signal of adjustable voltage amplifier 6 is carried out oppositely. The two ends of the 14 resistance 37 are connected with output and the reverse input end of operational amplifier 27 respectively. The reverse input end of the 5th operational amplifier 35 is connected to the second end of quartz crystal 1 by the 13 resistance 36, it is input end grounding in the same way. One end of building-out capacitor 38 is connected to the first end of quartz crystal 1, and the other end connects the output of the 5th operational amplifier 35. To offset shunt capacitance C0The error signal producing.
What those skilled in the art can understand is, for unspecified other content of this description, be that those skilled in the art can easily realize according to the description of this description and in conjunction with the common practise of this area, therefore, do not repeat in this manual.
The foregoing is only the preferred embodiments of the present invention, be not used for limiting the scope of the invention. For a person skilled in the art, do not paying under the prerequisite of creative work, can make some amendments and replacement to the present invention, within all such modifications and replacement all should be encompassed in protection scope of the present invention.
Claims (8)
1. the sinusoidal wave quartz oscillator based on analog circuit, is characterized in that, comprises frequency loop (3) and amplitude loop (4), wherein,
Described frequency loop (3) comprises quartz crystal (1), current amplifier (5) and adjustable voltage amplifier (6), the input of described current amplifier (5) is connected with the first end of quartz crystal (1), be voltage by the current conversion of the described quartz crystal (1) of flowing through, its output is connected with an input of described adjustable voltage amplifier (6); The output of described adjustable voltage amplifier (6) is connected with the second end of described quartz crystal (1), by after-applied on described quartz crystal (1) voltage scaling of described current amplifier (5) output; And
Described amplitude loop (4) comprises magnitude demodulator device (7), integrator (8) and controlled current source (9), the input of described magnitude demodulator device (7) is connected to the output of described current amplifier (5), receives the AC signal of described current amplifier (5) and converts it into the direct current signal that can reflect AC signal amplitude; The input of described integrator (8) is connected with the output of described magnitude demodulator device (7), and the direct current signal to described magnitude demodulator device (7) output and the voltage reference signal of setting carry out integration; The output of described integrator (8) is connected with the input of described controlled current source (9), with the ability of controlled current source (9) output current described in its output voltage signal control; The output of described controlled current source (9) is connected to another input of described adjustable voltage amplifier (6), with the multiplication factor of adjustable voltage amplifier (6) described in its output current control;
Described magnitude demodulator device (7) comprises the second operational amplifier (13), the second resistance (14), the 3rd resistance (15), the first diode (16) and the second diode (17), wherein, the anode tap of described the first diode (16) is connected to the reverse input end of described the second operational amplifier (13), and its cathode terminal is connected to the output of described the second operational amplifier (13); One end of described the 3rd resistance (15) is connected to the reverse input end of described the second operational amplifier (13), the other end is connected to the cathode terminal of described the second diode (17), and the anode tap of described the second diode (17) is connected to the output of described the second operational amplifier (13); One end of described the second resistance (14) is connected to the output of described current amplifier (5) as the input of described magnitude demodulator device (7), the other end is connected to the reverse input end of described the second operational amplifier (13); The input end grounding in the same way of described the second operational amplifier (13), and its output is as the output of described magnitude demodulator device (7).
2. the sinusoidal wave quartz oscillator based on analog circuit according to claim 1, it is characterized in that, described current amplifier (5) comprises the first resistance (11), the first electric capacity (12) and the first operational amplifier (10), wherein, described the first resistance (11) and the first electric capacity (12) are connected in parallel on the reverse input end and output of described the first operational amplifier (10); The reverse input end of described the first operational amplifier (10) is connected with the first end of quartz crystal (1), it is input end grounding in the same way, and the reverse input end of described the first operational amplifier (10) is as the input of described current amplifier (5), and the output of described the first operational amplifier (10) is as the output of described current amplifier (5).
3. the sinusoidal wave quartz oscillator based on analog circuit according to claim 1, it is characterized in that, described integrator (8) comprises the 3rd operational amplifier (18), the 4th resistance (19), the 5th resistance (20), the 6th resistance (21), the 7th resistance (22), the 3rd diode (23), the second electric capacity (24), and the 3rd electric capacity (25), wherein, one end of described the 5th resistance (20) is connected to the output of described magnitude demodulator device (7) as the input of described integrator (8), the other end is connected to the reverse input end of described the 3rd operational amplifier (18), the two ends of described the 3rd electric capacity (25) connect respectively reverse input end and the input of described the 3rd operational amplifier (18), one end of described the 7th resistance (22) is connected to the reverse input end of described the 3rd operational amplifier (18), the other end connects one end of described the second electric capacity (24), and the other end of described the second electric capacity (24) is connected to the output of described operational amplifier (18), the cathode terminal of described the 3rd diode (23) and anode tap are connected respectively reverse input end and the output of described the 3rd operational amplifier (18), the two ends of described the 6th resistance (21) connect respectively the reverse input end of described the 3rd operational amplifier (18) and the output of described current amplifier (5), one end of described the 4th resistance (19) is connected with voltage-reference, and the other end is connected to the reverse input end of described the 3rd operational amplifier (18), and the input end grounding in the same way of described operational amplifier (18), and its output is as the output of described integrator (8).
4. the sinusoidal wave quartz oscillator based on analog circuit according to claim 1, it is characterized in that, described controlled current source (9) adopts N channel junction field-effect pipe (26), its grid connects the output of described integrator (8), source ground, drain electrode connects another input of described adjustable voltage amplifier (6).
5. the sinusoidal wave quartz oscillator based on analog circuit according to claim 1, it is characterized in that, described adjustable voltage amplifier (6) comprises four-operational amplifier (27), the 8th resistance (28), the 9th resistance (29), the tenth resistance (30), the 11 resistance (31), and the 12 resistance (32), wherein, one end of described the 8th resistance (28) and the 9th resistance (29) is all connected to the output of described current amplifier (5), the other end of described the 8th resistance (28) is connected to the input in the same way of described four-operational amplifier (27), the other end of described the 9th resistance (29) is connected to the reverse input end of described four-operational amplifier (27), one end ground connection of described the 11 resistance (31), the other end is connected to the reverse input end of described four-operational amplifier (27), the two ends of described the 12 resistance (32) are connected to respectively reverse input end and the output of described four-operational amplifier (27), the two ends of described the tenth resistance (30) connect respectively input in the same way and the ground connection of described four-operational amplifier (27), the input in the same way of described four-operational amplifier (27) is connected to the output of described controlled current source (9), and its output is connected to the second end of described quartz crystal (1).
6. the sinusoidal wave quartz oscillator based on analog circuit according to claim 1, it is characterized in that, described integrator (8) comprises the 3rd operational amplifier (18), the 4th resistance (19), the 5th resistance (20), the 6th resistance (21), the 7th resistance (22), the second electric capacity (24), and the 3rd electric capacity (25), wherein, one end of described the 5th resistance (20) is connected to the output of described magnitude demodulator device (7) as the input of described integrator (8), the other end is connected to the reverse input end of described the 3rd operational amplifier (18), the two ends of described the 3rd electric capacity (25) connect respectively reverse input end and the input of described the 3rd operational amplifier (18), one end of described the 7th resistance (22) is connected to the reverse input end of described the 3rd operational amplifier (18), the other end connects one end of described the second electric capacity (24), and the other end of described the second electric capacity (24) is connected to the output of described operational amplifier (18), the two ends of described the 6th resistance (21) connect respectively the reverse input end of described the 3rd operational amplifier (18) and the output of described current amplifier (5), one end of described the 4th resistance (19) is connected with voltage-reference, and the other end is connected to the reverse input end of described the 3rd operational amplifier (18), and the input end grounding in the same way of described operational amplifier (18), and its output is as the output of described integrator (8), and
Described controlled current source (9) comprises N channel junction field-effect pipe (26) and the 4th diode (33), wherein, the anode tap of described the 4th diode (33) is connected to the grid of described N channel junction field-effect pipe (26), its cathode terminal ground connection; The grid of described N channel junction field-effect pipe (26) connects the output of described integrator (8), source ground, and drain electrode connects another input of described adjustable voltage amplifier (6).
7. the sinusoidal wave quartz oscillator based on analog circuit according to claim 1, it is characterized in that, described integrator (8) comprises the 3rd operational amplifier (18), the 4th resistance (19), the 5th resistance (20), the 6th resistance (21), the 7th resistance (22), the second electric capacity (24), and the 3rd electric capacity (25), wherein, one end of described the 5th resistance (20) is connected to the output of described magnitude demodulator device (7) as the input of described integrator (8), the other end is connected to the reverse input end of described the 3rd operational amplifier (18), the two ends of described the 3rd electric capacity (25) connect respectively reverse input end and the input of described the 3rd operational amplifier (18), one end of described the 7th resistance (22) is connected to the reverse input end of described the 3rd operational amplifier (18), the other end connects one end of described the second electric capacity (24), and the other end of described the second electric capacity (24) is connected to the output of described operational amplifier (18), the two ends of described the 6th resistance (21) connect respectively the reverse input end of described the 3rd operational amplifier (18) and the output of described current amplifier (5), one end of described the 4th resistance (19) is connected with voltage-reference, and the other end is connected to the reverse input end of described the 3rd operational amplifier (18), and the input end grounding in the same way of described operational amplifier (18), and its output is as the output of described integrator (8), and
Described controlled current source (9) is N channel enhancement metal-oxide-semiconductor (34), the grid of described N channel enhancement metal-oxide-semiconductor (34) connects the output of described integrator (8), source electrode and substrate ground connection, drain electrode connects another input of described adjustable voltage amplifier (6).
8. according to the sinusoidal wave quartz oscillator based on analog circuit in any one of the preceding claims wherein, it is characterized in that, described sinusoidal wave quartz oscillator also comprises C0Compensating circuit, described C0Compensating circuit comprises the 5th operational amplifier (35), the 13 resistance (36), the 14 resistance (37) and building-out capacitor (38), wherein, one end of described building-out capacitor (38) is connected to the first end of described quartz crystal (1), and the other end of described building-out capacitor (38) connects the output of described the 5th operational amplifier (35); The reverse input end of described the 5th operational amplifier (35) is connected to the second end of described quartz crystal (1) by described the 13 resistance (36), it is input end grounding in the same way; The two ends of described the 14 resistance (37) connect respectively reverse input end and the output of described the 5th operational amplifier (35).
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| CN105549667B (en) * | 2016-01-24 | 2016-12-14 | 丁婕 | A kind of fixed amplitude circuit of ac voltage signal |
| CN107421524B (en) * | 2017-08-03 | 2020-02-07 | 中国电子科技集团公司第二十四研究所 | Quartz crystal oscillation drive circuit and monolithic integrated circuit thereof |
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| US4358742A (en) * | 1980-03-07 | 1982-11-09 | The Singer Company | Transimpedance oscillator having high gain amplifier |
| CN1277752A (en) * | 1997-10-31 | 2000-12-20 | 艾利森电话股份有限公司 | Crystal oscillator with AGC and on-chip tuning |
| CN1909360A (en) * | 2005-08-01 | 2007-02-07 | 马维尔国际贸易有限公司 | Low-noise high-stability crystal oscillator |
| CN102624335A (en) * | 2012-04-17 | 2012-08-01 | 钜泉光电科技(上海)股份有限公司 | Novel crystal oscillator circuit |
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| US7683730B2 (en) * | 2004-09-24 | 2010-03-23 | Cypress Semiconductor Corporation | Differential crystal oscillator circuit with peak regulation |
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|---|---|---|---|---|
| US4358742A (en) * | 1980-03-07 | 1982-11-09 | The Singer Company | Transimpedance oscillator having high gain amplifier |
| CN1277752A (en) * | 1997-10-31 | 2000-12-20 | 艾利森电话股份有限公司 | Crystal oscillator with AGC and on-chip tuning |
| CN1909360A (en) * | 2005-08-01 | 2007-02-07 | 马维尔国际贸易有限公司 | Low-noise high-stability crystal oscillator |
| CN102624335A (en) * | 2012-04-17 | 2012-08-01 | 钜泉光电科技(上海)股份有限公司 | Novel crystal oscillator circuit |
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