CN202798671U - Temperature control system for oven controlled crystal oscillator - Google Patents
Temperature control system for oven controlled crystal oscillator Download PDFInfo
- Publication number
- CN202798671U CN202798671U CN 201220416757 CN201220416757U CN202798671U CN 202798671 U CN202798671 U CN 202798671U CN 201220416757 CN201220416757 CN 201220416757 CN 201220416757 U CN201220416757 U CN 201220416757U CN 202798671 U CN202798671 U CN 202798671U
- Authority
- CN
- China
- Prior art keywords
- crystal oscillator
- temperature
- constant
- ic1a
- pdi
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Abstract
The utility model relates to the technical field of temperature control for an oven controlled crystal oscillator, and especially relates to a temperature control system for an oven controlled crystal oscillator. The temperature control system comprises a PDI operation amplification adjusting circuit, a sampling comparison amplification circuit and a groove of the oven controlled crystal oscillator. The PDI operation amplification adjusting circuit is connected with the groove of the oven controlled crystal oscillator. The sampling comparison amplification circuit is connected with the groove of the oven controlled crystal oscillator. The PDI operation amplification adjusting circuit is connected with the sampling comparison amplification circuit. The temperature control system additionally has a function of monitoring heated current in a real-time manner, so that the temperature of the groove is directly controlled through monitoring of the current. Such control exhibits a good effect, and slight changes of the current can be amplified through an operation amplifier. Therefore, the temperature control system allows coarse adjustment and fine adjustment to be effectively combined so as to effectively control the temperature of the groove.
Description
Technical field
The utility model relates to constant-temperature crystal oscillator temperature control technology field, relates in particular to a kind of constant-temperature crystal oscillator temperature-controlling system.
Background technology
Traditional heated for controlling temperature circuit is the PID temperature controlling mode of single amplifier, just controls realization by the variations in temperature of induction constant temperature cell body.Because thermistor itself has discreteness, thermo-lag etc., often cause easily the insensitive and hysteresis of control circuit control, the temperature of control cell body that can only be rough, it is poor to cause the temperature control effect of constant-temperature crystal oscillator, thereby have influence on the temperature characterisitic (temperature drift) of whole constant-temperature crystal oscillator, so that the constant-temperature crystal oscillator temperature characterisitic is unstable.
The utility model content
The purpose of this utility model be to provide for the deficiencies in the prior art a kind of temperature control effect good the constant-temperature crystal oscillator temperature-controlling system.
The purpose of this utility model realizes by following technical measures:
A kind of constant-temperature crystal oscillator temperature-controlling system, comprise that PDI amplification adjusting circuit, sampling rate are than the cell body of amplifying circuit, constant-temperature crystal oscillator, the PDI amplification adjusting circuit is connected with the cell body of constant-temperature crystal oscillator, sampling rate is connected with the cell body of constant-temperature crystal oscillator than amplifying circuit, and the PDI amplification adjusting circuit is connected than amplifying circuit with sampling rate.
Wherein, the PDI amplification adjusting circuit comprises: operational amplifier IC1A, and capacitor C f2, Cf3, Cf4, C2, resistance R _ f, RT1, R5, R6, R7, R8, R9, RT1 are thermistor;
The end of the inverting input of IC1A and R7, the end of Cf3, the end of Cf4, the end of Rf connect;
The in-phase input end of IC1A is connected with the end of R9;
The output of IC1A is connected with an end, the comparison amplifying circuit of the Cf3 other end, Cf2;
The Rf other end is connected with the Cf2 other end;
The other end of Cf4 is connected with the end of R5, the end of R6, the other end of R7;
The other end of R9 is connected with the end of RT1, the end of R8, the end of C2;
The R8 other end, the R5 other end are connected with power supply V1;
The other end ground connection of the other end of the R6 other end, RT1, C2;
The positive source of IC1A is connected with power supply V1;
The power cathode ground connection of IC1A.
Wherein, sampling rate comprises than amplifying circuit: operational amplifier IC1B, resistance R 00, R01, R20, R21, R3, R4, and capacitor C f1, NPN manages Q1, Q2;
The inverting input of IC1B is connected with the end of R2, the end of R20, the end of R21, the end of Cf1;
The R2 other end is connected with power supply V1;
The Cf1 other end is connected with the output of IC1B, the base stage of Q1, the base stage of Q2;
The other end of R20 is connected with the end of R00, the emitter of Q1;
The other end of R21 is connected with the end of R01, the emitter of Q2;
The other end ground connection of the other end of R00 and R01;
The collector electrode of Q1 is connected with the collector electrode of Q2, power Vcc;
The IC1B in-phase input end is connected with the end of R3, the end of R4;
The R4 other end is connected with the output of IC1A;
The other end ground connection of R3;
The positive source of IC1B is connected with power supply V1;
The power cathode ground connection of IC1B.
Wherein, also comprise flex point compensation and the regulating circuit of constant-temperature crystal oscillator, the flex point compensation of constant-temperature crystal oscillator is connected with the PDI amplification adjusting circuit with regulating circuit, and the PDI amplification adjusting circuit comprises IC, resistance R 10;
8 pin of IC are connected with V1;
1 pin of IC is connected with the end of R10;
The other end of R10 is connected with the other end of the R9 of PDI amplification adjusting circuit, the end of RT1, the end of R8.
Another program:
Wherein, the PDI amplification adjusting circuit comprises: operational amplifier IC1A, and capacitor C f2, Cf3, Cf4, C2, resistance R _ f, RT1, R5, R6, R7, R8, R9, RT1 are thermistor;
The end of the inverting input of IC1A and R9, the end of Cf3, the end of Cf4, the end of Rf connect;
The in-phase input end of IC1A is connected with the end of R7;
The output of IC1A is connected with an end, the comparison amplifying circuit of the Cf3 other end, Cf2;
The Rf other end is connected with the Cf2 other end;
The other end of Cf4 is connected with the end of R8, the end of C2, the other end of R9, the end of RT1;
The other end of R7 is connected with the end of R6, the end of R5;
The R8 other end, the R5 other end are connected with power supply V1;
The other end ground connection of the other end of the R6 other end, RT1, C2;
The positive source of IC1A is connected with power Vcc;
The power cathode ground connection of IC1A.
Wherein, sampling rate comprises than amplifying circuit: operational amplifier IC1B, resistance R 00, R01, R20, R21, R3, R4, and capacitor C f1, PNP manages Q1, Q2;
The inverting input of IC1B is connected with the end of R2, the end of R20, the end of R21, the end of Cf1;
The R2 other end is connected with power supply V1;
The Cf1 other end is connected with the output of IC1B, the base stage of Q1, the base stage of Q2;
The other end of R20 is connected with the end of R00, the emitter of Q1;
The other end of R21 is connected with the end of R01, the emitter of Q2;
The other end of R00 is connected with the other end of R01, power Vcc;
The collector electrode of Q1 is connected with the collector electrode of Q2, power Vcc;
The IC1B in-phase input end is connected with the end of R3, the end of R4;
The R4 other end is connected with the output of IC1A;
The other end of R3 is connected with power Vcc;
The collector electrode of Q1, the grounded collector of Q2;
The positive source of IC1B is connected with power Vcc;
The power cathode ground connection of IC1B.
Wherein, also comprise flex point compensation and the regulating circuit of constant-temperature crystal oscillator, the flex point compensation of constant-temperature crystal oscillator is connected with the PDI amplification adjusting circuit with regulating circuit, and the PDI amplification adjusting circuit comprises IC, resistance R 10;
8 pin of IC are connected with V1;
1 pin of IC is connected with the end of R10;
The other end of R10 is connected with the other end of the R7 of PDI amplification adjusting circuit, the end of R6, the end of R5.
A kind of constant-temperature crystal oscillator temperature-controlling system of the present utility model, comprise that PDI amplification adjusting circuit, sampling rate are than the cell body of amplifying circuit, constant-temperature crystal oscillator, the PDI amplification adjusting circuit is connected with the cell body of constant-temperature crystal oscillator, sampling rate is connected with the cell body of constant-temperature crystal oscillator than amplifying circuit, the PDI amplification adjusting circuit is connected than amplifying circuit with sampling rate, the utility model increases the function of the electric current of Real Time Monitoring heating, by the monitoring to electric current, directly controls the temperature of cell body.Such control is effective, and trickle curent change, all amplify by amplifier, so the utility model carries out effective combination with coarse adjustment and fine tuning, can effectively control the temperature of cell body.
Description of drawings
Fig. 1 is the circuit diagram of embodiment 1 of the present utility model;
Fig. 2 is the circuit diagram of embodiment 2 of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Embodiment 1
As shown in Figure 1, a kind of constant-temperature crystal oscillator temperature-controlling system, comprise that PDI amplification adjusting circuit, sampling rate are than the cell body of amplifying circuit, constant-temperature crystal oscillator, the PDI amplification adjusting circuit is connected with the cell body of constant-temperature crystal oscillator, sampling rate is connected with the cell body of constant-temperature crystal oscillator than amplifying circuit, and the PDI amplification adjusting circuit is connected than amplifying circuit with sampling rate.
Present embodiment PDI amplification adjusting circuit comprises: operational amplifier IC1A, and capacitor C f2, Cf3, Cf4, C2, resistance R _ f, RT1, R5, R6, R7, R8, R9, RT1 are thermistor;
The end of the inverting input of IC1A and R7, the end of Cf3, the end of Cf4, the end of Rf connect;
The in-phase input end of IC1A is connected with the end of R9;
The output of IC1A is connected with an end, the comparison amplifying circuit of the Cf3 other end, Cf2;
The Rf other end is connected with the Cf2 other end;
The other end of Cf4 is connected with the end of R5, the end of R6, the other end of R7;
The other end of R9 is connected with the end of RT1, the end of R8, the end of C2;
The R8 other end, the R5 other end are connected with power supply V1;
The other end ground connection of the other end of the R6 other end, RT1, C2;
The positive source of IC1A is connected with power supply V1;
The power cathode ground connection of IC1A.
The present embodiment sampling rate comprises than amplifying circuit: operational amplifier IC1B, resistance R 00, R01, R20, R21, R3, R4, and capacitor C f1, NPN manages Q1, Q2;
The inverting input of IC1B is connected with the end of R2, the end of R20, the end of R21, the end of Cf1;
The R2 other end is connected with power supply V1;
The Cf1 other end is connected with the output of IC1B, the base stage of Q1, the base stage of Q2;
The other end of R20 is connected with the end of R00, the emitter of Q1;
The other end of R21 is connected with the end of R01, the emitter of Q2;
The other end ground connection of the other end of R00 and R01;
The collector electrode of Q1 is connected with the collector electrode of Q2, power Vcc;
The IC1B in-phase input end is connected with the end of R3, the end of R4;
The R4 other end is connected with the output of IC1A;
The other end ground connection of R3;
The positive source of IC1B is connected with power supply V1;
The power cathode ground connection of IC1B.
Present embodiment also comprises flex point compensation and the regulating circuit of constant-temperature crystal oscillator, and the flex point compensation of constant-temperature crystal oscillator is connected with the PDI amplification adjusting circuit with regulating circuit, and the PDI amplification adjusting circuit comprises IC, resistance R 10;
8 pin of IC are connected with V1;
1 pin of IC is connected with the end of R10;
The other end of R10 is connected with the other end of the R9 of PDI amplification adjusting circuit, the end of RT1, the end of R8.
Present embodiment operational amplifier IC1A, Rf, Cf2, Cf3, Cf4, C2, resistance R 5, R6, R7, R8, R9, RT1 consist of the PDI amplification adjusting circuit.By the temperature fluctuation of discrete temperature-sensitive element monitoring constant temperature cell body, through the control of PID amplifier rough regulate and control the cell body temperature.
Operational amplifier IC1B, resistance R 00, R01, R20, R21, R2, R3, R4, capacitor C f1 consist of sampling rate than amplifying circuit.Cross the trickle situation of change of heating current of R00, R01 by direct monitoring flow, and compare with the controlled quentity controlled variable of previous stage to heat, by the relatively judgement output of amplifier, thereby come opening with disconnected more effective, the more accurate thermal stability to the constant temperature cell body of power ratio control pipe Q1 and Q2 to carry out trickle control and adjusting.
The IC of present embodiment carries out the flex point compensation and regulates the temperature-adjusting circuit of thermostat by R10.
As shown in Figure 2, a kind of constant-temperature crystal oscillator temperature-controlling system of present embodiment, comprise that PDI amplification adjusting circuit, sampling rate are than the cell body of amplifying circuit, constant-temperature crystal oscillator, the PDI amplification adjusting circuit is connected with the cell body of constant-temperature crystal oscillator, sampling rate is connected with the cell body of constant-temperature crystal oscillator than amplifying circuit, and the PDI amplification adjusting circuit is connected than amplifying circuit with sampling rate.
The PDI amplification adjusting circuit of present embodiment comprises operational amplifier IC1A, capacitor C f2, Cf3, Cf4, C2, and resistance R _ f, RT1, R5, R6, R7, R8, R9, RT1 are thermistor;
The end of the inverting input of IC1A and R9, the end of Cf3, the end of Cf4, the end of Rf connect;
The in-phase input end of IC1A is connected with the end of R7;
The output of IC1A is connected with an end, the comparison amplifying circuit of the Cf3 other end, Cf2;
The Rf other end is connected with the Cf2 other end;
The other end of Cf4 is connected with the end of R8, the end of C2, the other end of R9, the end of RT1;
The other end of R7 is connected with the end of R6, the end of R5;
The R8 other end, the R5 other end are connected with power supply V1;
The other end ground connection of the other end of the R6 other end, RT1, C2;
The positive source of IC1A is connected with power Vcc;
The power cathode ground connection of IC1A.
The present embodiment sampling rate comprises than amplifying circuit: operational amplifier IC1B, resistance R 00, R01, R20, R21, R3, R4, and capacitor C f1, PNP manages Q1, Q2;
The inverting input of IC1B is connected with the end of R2, the end of R20, the end of R21, the end of Cf1;
The R2 other end is connected with power supply V1;
The Cf1 other end is connected with the output of IC1B, the base stage of Q1, the base stage of Q2;
The other end of R20 is connected with the end of R00, the emitter of Q1;
The other end of R21 is connected with the end of R01, the emitter of Q2;
The other end of R00 is connected with the other end of R01, power Vcc;
The collector electrode of Q1 is connected with the collector electrode of Q2, power Vcc;
The IC1B in-phase input end is connected with the end of R3, the end of R4;
The R4 other end is connected with the output of IC1A;
The other end of R3 is connected with power Vcc;
The collector electrode of Q1, the grounded collector of Q2;
The positive source of IC1B is connected with power Vcc;
The power cathode ground connection of IC1B.
Present embodiment also comprises flex point compensation and the regulating circuit of constant-temperature crystal oscillator, and the flex point compensation of constant-temperature crystal oscillator is connected with the PDI amplification adjusting circuit with regulating circuit, and the PDI amplification adjusting circuit comprises IC, resistance R 10;
8 pin of IC are connected with V1;
1 pin of IC is connected with the end of R10;
The other end of R10 is connected with the other end of the R7 of PDI amplification adjusting circuit, the end of R6, the end of R5.
Present embodiment operational amplifier IC1A, Rf, Cf2, Cf3, Cf4, C2, resistance R 5, R6, R7, R8, R9, RT1 consist of the PDI amplification adjusting circuit.By the temperature fluctuation of discrete temperature-sensitive element monitoring constant temperature cell body, through the control of PID amplifier rough regulate and control the cell body temperature.
Operational amplifier IC1B, resistance R 00, R01, R20, R21, R2, R3, R4, capacitor C f1 consist of sampling rate than amplifying circuit.Cross the trickle situation of change of heating current of R00, R01 by direct monitoring flow, and compare with the controlled quentity controlled variable of previous stage to heat, by the relatively judgement output of amplifier, thereby come opening with disconnected more effective, the more accurate thermal stability to the constant temperature cell body of power ratio control pipe Q1 and Q2 to carry out trickle control and adjusting.
The IC of present embodiment carries out the flex point compensation and regulates the temperature-adjusting circuit of thermostat by R10.
The utility model power supply V1 is less than Vcc, and the power supply that is about to amplifier is lower than external power supply, has both guaranteed the job stability of amplifier, has guaranteed that also output is not subjected to the influence of fluctuations of power supply, has guaranteed the stable of control signal, therefore can adopt the secondary pressure power supply.
The utility model can also carry out voltage stabilizing to V1, can guarantee the stability of amplifier reference point and output.
A kind of constant-temperature crystal oscillator temperature-controlling system of the present utility model, comprise that PDI amplification adjusting circuit, sampling rate are than the cell body of amplifying circuit, constant-temperature crystal oscillator, the PDI amplification adjusting circuit is connected with the cell body of constant-temperature crystal oscillator, sampling rate is connected with the cell body of constant-temperature crystal oscillator than amplifying circuit, the PDI amplification adjusting circuit is connected than amplifying circuit with sampling rate, the utility model increases the function of the electric current of Real Time Monitoring heating, by the monitoring to electric current, directly controls the temperature of cell body.Such control is effective, and trickle curent change, all amplify by amplifier, so the utility model carries out effective combination with coarse adjustment and fine tuning, can effectively control the temperature of cell body.
Should be noted that at last; above embodiment is only in order to illustrate the technical solution of the utility model; but not to the restriction of the utility model protection range; although with reference to preferred embodiment the utility model has been done to explain; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement the technical solution of the utility model, and not break away from essence and the scope of technical solutions of the utility model.
Claims (7)
1. constant-temperature crystal oscillator temperature-controlling system, it is characterized in that: comprise that PDI amplification adjusting circuit, sampling rate are than the cell body of amplifying circuit, constant-temperature crystal oscillator, the PDI amplification adjusting circuit is connected with the cell body of constant-temperature crystal oscillator, sampling rate is connected with the cell body of constant-temperature crystal oscillator than amplifying circuit, and the PDI amplification adjusting circuit is connected than amplifying circuit with sampling rate.
2. constant-temperature crystal oscillator temperature-controlling system according to claim 1, it is characterized in that: the PDI amplification adjusting circuit comprises: operational amplifier IC1A, capacitor C f2, Cf3, Cf4, C2, resistance R _ f, RT1, R5, R6, R7, R8, R9, RT1 are thermistor;
The end of the inverting input of IC1A and R7, the end of Cf3, the end of Cf4, the end of Rf connect;
The in-phase input end of IC1A is connected with the end of R9;
The output of IC1A is connected with an end, the comparison amplifying circuit of the Cf3 other end, Cf2;
The Rf other end is connected with the Cf2 other end;
The other end of Cf4 is connected with the end of R5, the end of R6, the other end of R7;
The other end of R9 is connected with the end of RT1, the end of R8, the end of C2;
The R8 other end, the R5 other end are connected with power supply V1;
The other end ground connection of the other end of the R6 other end, RT1, C2;
The positive source of IC1A is connected with power supply V1;
The power cathode ground connection of IC1A.
3. constant-temperature crystal oscillator temperature-controlling system according to claim 2, it is characterized in that: sampling rate comprises than amplifying circuit: operational amplifier IC1B, resistance R 00, R01, R20, R21, R3, R4, capacitor C f1, NPN manages Q1, Q2;
The inverting input of IC1B is connected with the end of R2, the end of R20, the end of R21, the end of Cf1;
The R2 other end is connected with power supply V1;
The Cf1 other end is connected with the output of IC1B, the base stage of Q1, the base stage of Q2;
The other end of R20 is connected with the end of R00, the emitter of Q1;
The other end of R21 is connected with the end of R01, the emitter of Q2;
The other end ground connection of the other end of R00 and R01;
The collector electrode of Q1 is connected with the collector electrode of Q2, power Vcc;
The IC1B in-phase input end is connected with the end of R3, the end of R4;
The R4 other end is connected with the output of IC1A;
The other end ground connection of R3;
The positive source of IC1B is connected with power supply V1;
The power cathode ground connection of IC1B.
4. the described constant-temperature crystal oscillator temperature-controlling system of any one according to claim 1-3, it is characterized in that: the flex point compensation and the regulating circuit that also comprise constant-temperature crystal oscillator, the flex point compensation of constant-temperature crystal oscillator is connected with the PDI amplification adjusting circuit with regulating circuit, the PDI amplification adjusting circuit comprises IC, resistance R 10;
8 pin of IC are connected with V1;
1 pin of IC is connected with the end of R10;
The other end of R10 is connected with the other end of the R9 of PDI amplification adjusting circuit, the end of RT1, the end of R8.
5. constant-temperature crystal oscillator temperature-controlling system according to claim 1, it is characterized in that: the PDI amplification adjusting circuit comprises: operational amplifier IC1A, capacitor C f2, Cf3, Cf4, C2, resistance R _ f, RT1, R5, R6, R7, R8, R9, RT1 are thermistor;
The end of the inverting input of IC1A and R9, the end of Cf3, the end of Cf4, the end of Rf connect;
The in-phase input end of IC1A is connected with the end of R7;
The output of IC1A is connected with an end, the comparison amplifying circuit of the Cf3 other end, Cf2;
The Rf other end is connected with the Cf2 other end;
The other end of Cf4 is connected with the end of R8, the end of C2, the other end of R9, the end of RT1;
The other end of R7 is connected with the end of R6, the end of R5;
The R8 other end, the R5 other end are connected with power supply V1;
The other end ground connection of the other end of the R6 other end, RT1, C2;
The positive source of IC1A is connected with power Vcc;
The power cathode ground connection of IC1A.
6. constant-temperature crystal oscillator temperature-controlling system according to claim 5, it is characterized in that: sampling rate comprises than amplifying circuit: operational amplifier IC1B, resistance R 00, R01, R20, R21, R3, R4, capacitor C f1, PNP manages Q1, Q2;
The inverting input of IC1B is connected with the end of R2, the end of R20, the end of R21, the end of Cf1;
The R2 other end is connected with power supply V1;
The Cf1 other end is connected with the output of IC1B, the base stage of Q1, the base stage of Q2;
The other end of R20 is connected with the end of R00, the emitter of Q1;
The other end of R21 is connected with the end of R01, the emitter of Q2;
The other end of the collector electrode of Q1, the collector electrode of Q2, R00, the other end of R01 are connected with power Vcc;
The IC1B in-phase input end is connected with the end of R3, the end of R4;
The R4 other end is connected with the output of IC1A;
The other end of R3 is connected with power Vcc;
The collector electrode of Q1, the grounded collector of Q2;
The positive source of IC1B is connected with power Vcc;
The power cathode ground connection of IC1B.
7. according to claim 5 or 6 described constant-temperature crystal oscillator temperature-controlling systems, it is characterized in that: the flex point compensation and the regulating circuit that also comprise constant-temperature crystal oscillator, the flex point compensation of constant-temperature crystal oscillator is connected with the PDI amplification adjusting circuit with regulating circuit, the PDI amplification adjusting circuit comprises IC, resistance R 10;
8 pin of IC are connected with V1;
1 pin of IC is connected with the end of R10;
The other end of R10 is connected with the other end of the R7 of PDI amplification adjusting circuit, the end of R6, the end of R5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220416757 CN202798671U (en) | 2012-08-22 | 2012-08-22 | Temperature control system for oven controlled crystal oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220416757 CN202798671U (en) | 2012-08-22 | 2012-08-22 | Temperature control system for oven controlled crystal oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202798671U true CN202798671U (en) | 2013-03-13 |
Family
ID=47825840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220416757 Withdrawn - After Issue CN202798671U (en) | 2012-08-22 | 2012-08-22 | Temperature control system for oven controlled crystal oscillator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202798671U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820883A (en) * | 2012-08-22 | 2012-12-12 | 东莞市金振电子有限公司 | Temperature control system of constant-temperature crystal oscillator |
| WO2017143623A1 (en) * | 2016-02-23 | 2017-08-31 | 广州时艺音响科技有限公司 | Control device for direct-current output potential of power amplifier |
-
2012
- 2012-08-22 CN CN 201220416757 patent/CN202798671U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820883A (en) * | 2012-08-22 | 2012-12-12 | 东莞市金振电子有限公司 | Temperature control system of constant-temperature crystal oscillator |
| CN102820883B (en) * | 2012-08-22 | 2014-12-24 | 东莞市金振电子有限公司 | Temperature control system of constant-temperature crystal oscillator |
| WO2017143623A1 (en) * | 2016-02-23 | 2017-08-31 | 广州时艺音响科技有限公司 | Control device for direct-current output potential of power amplifier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103551218B (en) | Incubator based on PID (Proportion Integration Differentiation) control | |
| CN101860322B (en) | Automatic temperature controlled crystal oscillator | |
| CN105577125B (en) | The control device of the direct current output current potential of power amplifier | |
| CN202798671U (en) | Temperature control system for oven controlled crystal oscillator | |
| CN107390744A (en) | A kind of temperature control power amplification circuit | |
| CN102820883B (en) | Temperature control system of constant-temperature crystal oscillator | |
| CN103905036A (en) | Temperature control circuit of constant-temperature crystal oscillator | |
| CN104713659A (en) | Thermistor resistance linear compensation circuit based on transistor output characteristic | |
| US4449032A (en) | Variable gain oven temperature control circuit | |
| CN204187854U (en) | A kind of thermostatic control system | |
| CN104331102A (en) | TEC-based laser temperature control circuit | |
| CN202798580U (en) | System capable of enhancing thermal stability of oven controlled crystal oscillator | |
| CN109240144B (en) | Constant opening control proportional valve opening adjustment control circuit | |
| CN103557950A (en) | Single photon detector with stable efficiency and control method | |
| US10461752B2 (en) | Temperature controlling apparatus and oscillation apparatus | |
| CN102801386B (en) | A kind of system strengthening the thermal stability of constant-temperature crystal oscillator | |
| CN203896310U (en) | Temperature control structure of single-slot constant-temperature crystal oscillator | |
| CN207198691U (en) | A kind of temperature-control circuit | |
| CN205786833U (en) | A kind of electronic circuit of open ring type Hall current sensor | |
| CN208753725U (en) | The thermostatic control system of EDFA pump laser | |
| CN103389007A (en) | Single-machine control system of launching vehicle | |
| CN209433264U (en) | A kind of lambda sensor automatic temperature control circuit | |
| CN111045466A (en) | Laser working temperature control circuit and control method thereof | |
| CN216490407U (en) | Temperature protection circuit of radio frequency amplifier | |
| CN104075325A (en) | Intelligent burning flame pre-restoration system and flame detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130313 Effective date of abandoning: 20141224 |
|
| RGAV | Abandon patent right to avoid regrant |