CN104953868A - Pulse width modulation type switch voltage stabilizing power supply based on phase-sensitive wave detection circuit - Google Patents
Pulse width modulation type switch voltage stabilizing power supply based on phase-sensitive wave detection circuit Download PDFInfo
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- CN104953868A CN104953868A CN201510320205.2A CN201510320205A CN104953868A CN 104953868 A CN104953868 A CN 104953868A CN 201510320205 A CN201510320205 A CN 201510320205A CN 104953868 A CN104953868 A CN 104953868A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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Abstract
The invention discloses a pulse width modulation type switch voltage stabilizing power supply based on a phase-sensitive wave detection circuit. The pulse width modulation type switch voltage stabilizing power supply comprises a diode rectifier U, a power amplifier P1, a transformer T, a switch filtering circuit, a power supply output circuit, a transformation feedback circuit, a switch control circuit, an oscillator, a first current comparator 1, a first current comparator 2, a slope compensator W, a PWM (pulse width modulation) controller, a sliding regulator and a phase-sensitive wave detection circuit. The pulse width modulation type switch voltage stabilizing power supply has the advantages that a field effect tube is used for forming the switch control circuit, so that the pulse width modulation type switch voltage stabilizing power supply has a voltage boosting mode and a voltage reduction mode, and in addition, the whole voltage range output current change is controlled within +/-0.1 percent. Compared with that of a conventional switch voltage stabilizing power supply, the output current change control range is greatly improved. Meanwhile, through the effect of the phase-sensitive wave detection circuit, carrier wave signals can be processed, so that the stability of the pulse width modulation type switch voltage stabilizing power supply is higher.
Description
Technical field
The present invention relates to a kind of switching power supply, specifically refer to a kind of pulse-width-modulating type switching power supply based on phase-sensitive detection circuit.
Background technology
Along with continuous progress scientific and technological at present, electronic product also brings great convenience to people are in life while function from strength to strength.Voltage stabilizing circuit is just runed and gives birth to, and traditional series connection linear regulator type voltage stabilizing circuit has the features such as stability is high, output voltage is adjustable, ripple coefficient is little, circuit is simple.But the Correctional tube of these series connection linear regulator type voltage stabilizing circuits is always operating at magnifying state, and have electric current to flow through, therefore the power consumption of its pipe is comparatively large, the efficiency of circuit is not high, generally can only reach about 30% ~ 50% always.In order to overcome above-mentioned defect, people just have developed switching mode voltage stabilizing circuit.
In switching mode voltage stabilizing circuit, surge pipe is operated on off state, pipe alternation saturated with cut-off two states in.When pipe saturation conduction, though it is large to flow through pipe current, but tube voltage drop is very little; When pipe ends, tube voltage drop is large, but the electric current flow through is close to zero.Therefore, under power output the same terms, the efficiency of switching mode voltage stabilizer coin series regulator is high, generally can reach about 80% ~ 90%.But its coefficient of stability of the switching mode voltage stabilizer that current people adopt is not high, affect the normal work of electronic product to a great extent.
Summary of the invention
The object of the invention is to overcome the not high defect of its coefficient of stability of current switching mode voltage stabilizer, a kind of pulse-width-modulating type switching power supply based on phase-sensitive detection circuit is provided.
Object of the present invention is achieved through the following technical solutions: based on the pulse-width-modulating type switching power supply of phase-sensitive detection circuit, it is by diode rectifier U, power amplifier P1, transformer T, be serially connected in the switched filter circuit between diode rectifier U and power amplifier P1, the power output circuit be connected with the secondary coil L2 of transformer T, the transformation feedback circuit be connected with the secondary coil L3 of transformer T, the ON-OFF control circuit be connected with transformation feedback circuit, the oscillator be connected with ON-OFF control circuit, the current comparator I1 be connected with ON-OFF control circuit, the current comparator I2 be connected with ON-OFF control circuit, respectively with oscillator, the slope equalizer W that current comparator I1 is connected with current comparator I2, the PWM controller be connected with current comparator I1 with power amplifier P1 respectively, output is connected with the tap on the primary coil L1 of transformer T, and the sliding damper that input is connected with the output of power amplifier P1, and the phase-sensitive detection circuit be serially connected between switched filter circuit and transformer T forms.
Further, described phase-sensitive detection circuit is by detection chip U3, negative pole is connected with+SIG the pin of detection chip U3, the polar capacitor C7 that positive pole is then connected with switched filter circuit, positive pole is connected with-SIG the pin of detection chip U3, the polar capacitor C8 of minus earth, one end is connected with-CAR the pin of detection chip U3, the resistance R4 of other end ground connection, N pole is ground connection after voltage stabilizing didoe D7, the voltage stabilizing didoe D4 that P pole is then connected with+CAR the pin of detection chip U3, one end is connected with the BIAS pin of detection chip U3, the resistance R5 of other end ground connection, one end is connected with-V the pin of detection chip U3, the resistance R6 of another termination 12V voltage, base stage is connected with+OUT the pin of detection chip U3 after diode D5, collector electrode is ground connection after diode D6 then, the triode Q1 that emitter is then connected with the ADJ pin of detection chip U3 after resistance R7, and one end is connected with the ADJ pin of detection chip U3, the potentiometer R8 that the other end is connected with the GMIN pin of detection chip U3 after resistance R9 forms, + CAR the pin of described detection chip U3 is connected with the positive pole of polar capacitor C7, and its-OUT pin is then connected with the Same Name of Ends of the emitter of triode Q1 and the primary coil L1 of transformer T respectively, and ADJ pin is then connected with the sliding end of potentiometer R8.
Described switched filter circuit is by triode Q, and electric capacity C1, electric capacity C2, resistance R1, resistance R2 and diode D1 form; The base stage of described triode Q forms loop with its collector electrode in turn after resistance R2, diode D1 and resistance R1, and electric capacity C1 and resistance R1 is in parallel, and electric capacity C2 and resistance R2 is in parallel; The collector electrode of triode Q is connected with the cathode output end of diode rectifier U, its grounded emitter; The cathode output end of diode rectifier U is then directly connected with the end of oppisite phase of power amplifier P1, and resistance R2 is then connected with the in-phase end of power amplifier P1 with the tie point of diode D1; Described diode D1 is connected with the positive pole of polar capacitor C7 with the tie point of electric capacity C1, and the non-same polarity of primary coil L1 is then connected with the in-phase end of power amplifier P1.
The diode D2 that described power output circuit is connected with the Same Name of Ends of secondary coil L2 by P pole, N pole is connected with the non-same polarity of secondary coil L2 after electric capacity C3, and the inductance L 4 that one end is connected with the N pole of diode D2, the other end is connected with the non-same polarity of secondary coil L2 after electric capacity C4 forms.
Described transformation feedback circuit is made up of diode D3 and electric capacity C5; The P pole of described diode D3 is connected with the non-same polarity of secondary coil L3, its N pole is connected with the Same Name of Ends of secondary coil L3 after electric capacity C5, the Same Name of Ends ground connection of described secondary coil L3.
Described ON-OFF control circuit is made up of field effect transistor MOS, power amplifier P2, voltage comparator U1, inductance L 5 and resistance R3; Described inductance L 5 is serially connected between the output of power amplifier P1 and the N pole of diode D3, and the drain electrode of field effect transistor MOS is connected with the N pole of diode D3, its source electrode ground connection, its grid after resistance R3 are then connected with the output of power amplifier P2; The S end of voltage comparator U1 is connected with the output of oscillator, and its R end is connected with the output of current comparator I1, and its Q end is then connected with the end of oppisite phase of power amplifier P2; The in-phase end of power amplifier P2 is then connected with the drain electrode of field effect transistor MOS; The electrode input end of current comparator I2 is then connected with the two ends of resistance R3 with negative input, and its output is connected with the input of oscillator with the negative input of current comparator I1 respectively after slope equalizer W; The electrode input end of current comparator I1 is then connected with the output of power amplifier P1; An output of PWM controller is connected with the end of oppisite phase of power amplifier P1 with the negative input of current comparator I1 respectively, its another output ground connection after electric capacity C6.
Described detection chip U3 is LM1496 Double deference analog multiplier.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention make use of the controlling functions of PWM fully, can automatically regulate electric power output voltage value according to duty ratio, guarantees the stable of output valve.
(2) initiative of the present invention slope equalizer and voltage, current comparator are used in a power, not only effectively reduce circuit self and external radio frequency interference, but also greatly simplify circuit structure, cost of manufacture and maintenance cost are had reduction by a relatively large margin.
(3) the present invention utilizes field effect transistor to form ON-OFF control circuit, the present invention is not only made to have possessed boost mode and decompression mode, but also making the change of full voltage range output current control between ± 0.1%, the output current change control range of more traditional switching power supply is greatly improved.
(4) the present invention is by the effect of phase-sensitive detection circuit, and it can process carrier signal of the present invention, makes stability of the present invention higher.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is phase-sensitive detection circuit structural representation of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, pulse-width-modulating type switching power supply based on phase-sensitive detection circuit of the present invention, it includes diode rectifier U, power amplifier P1, transformer T, switched filter circuit, power output circuit, transformation feedback circuit, ON-OFF control circuit, oscillator, current comparator I1, current comparator I2, slope equalizer W, PWM controller and sliding damper and phase-sensitive detection circuit.Wherein, transformer T is by the primary coil L1 being arranged on its former limit, and the secondary coil L2 and the secondary coil L3 that are arranged on its secondary form.The present invention is provided with a sliding tap on the primary coil L1 of transformer T, this sliding tap is then controlled by sliding damper, to guarantee to adjust turn ratio between the primary coil L1 of transformer T and secondary coil L2 and secondary coil L3 according to the duty ratio of PWM controller and the common results of ON-OFF control circuit, thus realize the output of different voltage.
The input of diode rectifier U is used for the civil power of external 220V, between the cathode output end that switched filter circuit is then serially connected in this diode rectifier U and the in-phase end of power amplifier P1.As shown in Figure 1, this switched filter circuit is by triode Q, and electric capacity C1, electric capacity C2, resistance R1, resistance R2 and diode D1 form.Wherein, the base stage of triode Q forms loop with its collector electrode in turn after resistance R2, diode D1 and resistance R1.Electric capacity C1 and resistance R1 is in parallel, and electric capacity C2 and resistance R2 is in parallel, to form typical RC filter circuit.Meanwhile, the collector electrode of triode Q is connected with the cathode output end of diode rectifier U, its grounded emitter; The cathode output end of diode rectifier U is then directly connected with the end of oppisite phase of power amplifier P1, and resistance R2 is then connected with the in-phase end of power amplifier P1 with the tie point of diode D1.Diode D1 is connected with phase-sensitive detection circuit with the tie point of electric capacity C1, and the non-same polarity of primary coil L1 is then connected with the in-phase end of power amplifier P1.
In this switched filter circuit, resistance R1, electric capacity C1 and diode D1 form feedback-clamp circuit, can improve the peak-inverse voltage of conversion efficiency and reduction power amplifier P1 in-phase end.
Power output circuit is used for the direct voltage of stable output, and it is made up of diode D2, electric capacity C3, inductance L 4 and electric capacity C4.During connection, the P pole of diode D2 is connected with the Same Name of Ends of secondary coil L2, and its N pole is connected with the non-same polarity of secondary coil L2 after electric capacity C3.One end of described inductance L 4 is connected with the N pole of diode D2, the other end is connected with the non-same polarity of secondary coil L2 after electric capacity C4.The two ends of electric capacity C4 then as the output of whole power supply, for external loading provides required voltage and current.
Transformation feedback circuit is used for providing feedback operation voltage, to guarantee that ON-OFF control circuit can control sliding damper according to feedback voltage for ON-OFF control circuit.This transformation feedback circuit is then made up of diode D3 and electric capacity C5.During connection, the P pole of described diode D3 is connected with the non-same polarity of secondary coil L3, its N pole is connected with the Same Name of Ends of secondary coil L3 after electric capacity C5, meanwhile, and the Same Name of Ends ground connection of this secondary coil L3.
ON-OFF control circuit is switching control section of the present invention, and it is made up of field effect transistor MOS, power amplifier P2, voltage comparator U1, inductance L 5 and resistance R3.As shown in Figure 1, this inductance L 5 is serially connected between the output of power amplifier P1 and the N pole of diode D3, and the drain electrode of field effect transistor MOS is connected with the N pole of diode D3, its source electrode ground connection, its grid after resistance R3 are then connected with the output of power amplifier P2.
The S end of voltage comparator U1 is connected with the output of oscillator, and its R end is connected with the output of current comparator I1, and its Q end is then connected with the end of oppisite phase of power amplifier P2.The in-phase end of power amplifier P2 is then connected with the drain electrode of field effect transistor MOS.The electrode input end of current comparator I2 is connected with the two ends of negative input with resistance R3, and during to guarantee field effect transistor MOS conducting, it can collect operating voltage from resistance R3 two ends.This voltage comparator U1 is preferably LM258D type comparator and realizes.
Simultaneously, the output of this current comparator I2 is connected with the input of oscillator with the negative input of current comparator I1 respectively after slope equalizer W, to guarantee that slope equalizer W can provide auxiliary slope-compensation for current comparator I1, make its working stability.
The electrode input end of current comparator I1 is then connected with the non-same polarity of primary coil L1 with the output of power amplifier P1; An output of PWM controller is connected with the end of oppisite phase of power amplifier P1 with the negative input of current comparator I1 respectively, its another output ground connection after electric capacity C6.
The structure of phase-sensitive detection circuit as shown in Figure 2, it is by detection chip U3, negative pole is connected with+SIG the pin of detection chip U3, the polar capacitor C7 that positive pole is then connected with the tie point of diode D1 with electric capacity C1, positive pole is connected with-SIG the pin of detection chip U3, the polar capacitor C8 of minus earth, one end is connected with-CAR the pin of detection chip U3, the resistance R4 of other end ground connection, N pole is ground connection after voltage stabilizing didoe D7, the voltage stabilizing didoe D4 that P pole is then connected with+CAR the pin of detection chip U3, one end is connected with the BIAS pin of detection chip U3, the resistance R5 of other end ground connection, one end is connected with-V the pin of detection chip U3, the resistance R6 of another termination 12V voltage, base stage is connected with+OUT the pin of detection chip U3 after diode D5, collector electrode is ground connection after diode D6 then, the triode Q1 that emitter is then connected with the ADJ pin of detection chip U3 after resistance R7, and one end is connected with the ADJ pin of detection chip U3, the potentiometer R8 that the other end is connected with the GMIN pin of detection chip U3 after resistance R9 forms.
During connection, + CAR the pin of described detection chip U3 is connected with the positive pole of polar capacitor C7, its-OUT pin is then connected with the Same Name of Ends of the emitter of triode Q1 and the primary coil L1 of transformer T respectively, and ADJ pin is then connected with the sliding end of potentiometer R8.
In order to reach better implementation result, this detection chip U3 is preferably LM1496 Double deference analog multiplier and realizes, and its maximum working voltage is 30V, and power consumption is 500mw, and working temperature is 0 ~ 70 DEG C.
+ SIG the pin of this detection chip U3 has direct current (DC) bias to input, and this polar capacitor C7 then can stopping direct current be coupled, and avoids affecting the present invention and normally works.This voltage stabilizing didoe D7 and voltage stabilizing didoe D4 can limit the level of carrier signal in circuit, avoids voltage fluctuation to impact the present invention.Resistance R9 and potentiometer R8 then can adjust gain of the present invention, thus makes stability of the present invention higher.
During use, the voltage acting on diode rectifier U carries out after filtering as the primary coil L1 of transformer T and power amplifier P1 provides operating voltage through switched filter circuit.When inductance coil L5 senses that external loading changes, when its induction reactance just changes, now power amplifier P2 impels field effect transistor MOS conducting under the acting in conjunction of voltage comparator U1 and inductance L 5, the pulse signal that PWM controller provides acts on power amplifier P1 and current comparator I1 after current comparator I1, sliding damper is obtained electric, and automatically regulate sliding tap according to the situation of change of load, thus change the primary coil L1 of transformer T and the turn ratio between secondary coil L2 and secondary coil L3, final realization is to the stable power-supplying function of load.
As mentioned above, just the present invention can well be realized.
Claims (6)
1. based on the pulse-width-modulating type switching power supply of phase-sensitive detection circuit, it is by diode rectifier U, power amplifier P1, transformer T, be serially connected in the switched filter circuit between diode rectifier U and power amplifier P1, the power output circuit be connected with the secondary coil L2 of transformer T, the transformation feedback circuit be connected with the secondary coil L3 of transformer T, the ON-OFF control circuit be connected with transformation feedback circuit, the oscillator be connected with ON-OFF control circuit, the current comparator I1 be connected with ON-OFF control circuit, the current comparator I2 be connected with ON-OFF control circuit, respectively with oscillator, the slope equalizer W that current comparator I1 is connected with current comparator I2, the PWM controller be connected with current comparator I1 with power amplifier P1 respectively, and output is connected with the tap on the primary coil L1 of transformer T, and the sliding damper that input is connected with the output of power amplifier P1 forms, it is characterized in that, between switched filter circuit and transformer T, be also serially connected with phase-sensitive detection circuit, described phase-sensitive detection circuit is by detection chip U3, negative pole is connected with+SIG the pin of detection chip U3, the polar capacitor C7 that positive pole is then connected with switched filter circuit, positive pole is connected with-SIG the pin of detection chip U3, the polar capacitor C8 of minus earth, one end is connected with-CAR the pin of detection chip U3, the resistance R4 of other end ground connection, N pole is ground connection after voltage stabilizing didoe D7, the voltage stabilizing didoe D4 that P pole is then connected with+CAR the pin of detection chip U3, one end is connected with the BIAS pin of detection chip U3, the resistance R5 of other end ground connection, one end is connected with-V the pin of detection chip U3, the resistance R6 of another termination 12V voltage, base stage is connected with+OUT the pin of detection chip U3 after diode D5, collector electrode is ground connection after diode D6 then, the triode Q1 that emitter is then connected with the ADJ pin of detection chip U3 after resistance R7, and one end is connected with the ADJ pin of detection chip U3, the potentiometer R8 that the other end is connected with the GMIN pin of detection chip U3 after resistance R9 forms, + CAR the pin of described detection chip U3 is connected with the positive pole of polar capacitor C7, and its-OUT pin is then connected with the Same Name of Ends of the emitter of triode Q1 and the primary coil L1 of transformer T respectively, and ADJ pin is then connected with the sliding end of potentiometer R8.
2. the pulse-width-modulating type switching power supply based on phase-sensitive detection circuit according to claim 1, is characterized in that, described switched filter circuit is by triode Q, and electric capacity C1, electric capacity C2, resistance R1, resistance R2 and diode D1 form; The base stage of described triode Q forms loop with its collector electrode in turn after resistance R2, diode D1 and resistance R1, and electric capacity C1 and resistance R1 is in parallel, and electric capacity C2 and resistance R2 is in parallel; The collector electrode of triode Q is connected with the cathode output end of diode rectifier U, its grounded emitter; The cathode output end of diode rectifier U is then directly connected with the end of oppisite phase of power amplifier P1, and resistance R2 is then connected with the in-phase end of power amplifier P1 with the tie point of diode D1; Described diode D1 is connected with the positive pole of polar capacitor C7 with the tie point of electric capacity C1, and the non-same polarity of primary coil L1 is then connected with the in-phase end of power amplifier P1.
3. the pulse-width-modulating type switching power supply based on phase-sensitive detection circuit according to claim 2, it is characterized in that, the diode D2 that described power output circuit is connected with the Same Name of Ends of secondary coil L2 by P pole, N pole is connected with the non-same polarity of secondary coil L2 after electric capacity C3, and the inductance L 4 that one end is connected with the N pole of diode D2, the other end is connected with the non-same polarity of secondary coil L2 after electric capacity C4 forms.
4. the pulse-width-modulating type switching power supply based on phase-sensitive detection circuit according to claim 3, is characterized in that, described transformation feedback circuit is made up of diode D3 and electric capacity C5; The P pole of described diode D3 is connected with the non-same polarity of secondary coil L3, its N pole is connected with the Same Name of Ends of secondary coil L3 after electric capacity C5, the Same Name of Ends ground connection of described secondary coil L3.
5. the pulse-width-modulating type switching power supply based on phase-sensitive detection circuit according to claim 4, is characterized in that, described ON-OFF control circuit is made up of field effect transistor MOS, power amplifier P2, voltage comparator U1, inductance L 5 and resistance R3; Described inductance L 5 is serially connected between the output of power amplifier P1 and the N pole of diode D3, and the drain electrode of field effect transistor MOS is connected with the N pole of diode D3, its source electrode ground connection, its grid after resistance R3 are then connected with the output of power amplifier P2; The S end of voltage comparator U1 is connected with the output of oscillator, and its R end is connected with the output of current comparator I1, and its Q end is then connected with the end of oppisite phase of power amplifier P2; The in-phase end of power amplifier P2 is then connected with the drain electrode of field effect transistor MOS; The electrode input end of current comparator I2 is then connected with the two ends of resistance R3 with negative input, and its output is connected with the input of oscillator with the negative input of current comparator I1 respectively after slope equalizer W; The electrode input end of current comparator I1 is then connected with the output of power amplifier P1; An output of PWM controller is connected with the end of oppisite phase of power amplifier P1 with the negative input of current comparator I1 respectively, its another output ground connection after electric capacity C6.
6. the pulse-width-modulating type switching power supply based on phase-sensitive detection circuit according to claim 5, is characterized in that, described detection chip U3 is LM1496 Double deference analog multiplier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510320205.2A CN104953868A (en) | 2014-11-22 | 2015-06-11 | Pulse width modulation type switch voltage stabilizing power supply based on phase-sensitive wave detection circuit |
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| CN201410676397.6A CN104506058A (en) | 2014-11-22 | 2014-11-22 | Switching voltage-stabilizing power supply based on pulse width modulation |
| CN2014106763976 | 2014-11-22 | ||
| CN201510320205.2A CN104953868A (en) | 2014-11-22 | 2015-06-11 | Pulse width modulation type switch voltage stabilizing power supply based on phase-sensitive wave detection circuit |
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| CN201510320205.2A Pending CN104953868A (en) | 2014-11-22 | 2015-06-11 | Pulse width modulation type switch voltage stabilizing power supply based on phase-sensitive wave detection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109125932A (en) * | 2018-10-23 | 2019-01-04 | 张鹏德 | A kind of electromagnetic pulse generation ring |
| CN109990804A (en) * | 2019-04-03 | 2019-07-09 | 安徽见行科技有限公司 | The self-correcting positive circuit of sensor circuit temperature drift based on analog multiplier |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6789780B2 (en) * | 2016-11-28 | 2020-11-25 | 株式会社 日立パワーデバイス | Rectifier and alternator using it |
| CN110289768B (en) * | 2019-07-26 | 2021-04-20 | 北京机械设备研究所 | Cross regulation rate control circuit and method for multi-output power supply |
-
2014
- 2014-11-22 CN CN201410676397.6A patent/CN104506058A/en active Pending
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- 2015-06-11 CN CN201510320205.2A patent/CN104953868A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109125932A (en) * | 2018-10-23 | 2019-01-04 | 张鹏德 | A kind of electromagnetic pulse generation ring |
| CN109125932B (en) * | 2018-10-23 | 2023-11-14 | 张鹏德 | Electromagnetic pulse generation ring |
| CN109990804A (en) * | 2019-04-03 | 2019-07-09 | 安徽见行科技有限公司 | The self-correcting positive circuit of sensor circuit temperature drift based on analog multiplier |
| CN109990804B (en) * | 2019-04-03 | 2021-06-29 | 安徽见行科技有限公司 | Self-correcting circuit of sensor circuit temperature drift based on analog multiplier |
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Application publication date: 20150930 |