CN201018459Y - Power amplifier based on high voltage great current operation amplifier - Google Patents
Power amplifier based on high voltage great current operation amplifier Download PDFInfo
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- CN201018459Y CN201018459Y CNU2007201072835U CN200720107283U CN201018459Y CN 201018459 Y CN201018459 Y CN 201018459Y CN U2007201072835 U CNU2007201072835 U CN U2007201072835U CN 200720107283 U CN200720107283 U CN 200720107283U CN 201018459 Y CN201018459 Y CN 201018459Y
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Abstract
The utility model discloses a power amplifier based on a high-voltage heavy-current operational amplifier, which comprises a main amplifying circuit, an auxiliary circuit and an output unit. Wherein the main amplifying circuit comprises an input buffer circuit formed by the voltage following the circuit, a U or I conversion circuit and a current expansion unit; the auxiliary circuit is composed of a voltage boosting unit; the signal output is mainly the output of the current signal. The constant current power amplifier has the advantages of the large power, the rapid response speed, the high precision, the good programmed control performance, the strong adaptability, etc. The main amplifying loop operational device adopts the operational amplifier which has the current limiting and short circuit protection functions and ensures the safe operation of the amplifier. The design of the load grounding mode adopts the mode of the floating load, and the negative feedback is formed through the feedback resistance, which has the function of automatic adjustment and current stability.
Description
Technical field
The utility model relates to Analogical Electronics, relates in particular to a kind of power amplifier based on the high voltage great current operation amplifier.
Background technology
Power amplifier is widely used in communication system and the various electronic equipment, for load provides enough big signal power.In drive motors, sonar transducer, coil/magnetic field excitation, programmable power supply, sound equipment etc. are used, need have the power amplifier or the analog line driver of low frequency (ultralow frequency) work, high-power output, high efficiency, Based Intelligent Control and defencive function.Sort circuit is often bulky, and therefore, the demand of integrated low frequency power drive circuit shows a rising trend.At present, the voltage-type power amplifier is comparatively general.But in some application scenario, it is good to need program control performance, and the big electric current of energy constant output, to drive the constant-current power amplifier of load.
Summary of the invention
The purpose of this utility model provides a kind of power amplifier based on the high voltage great current operation amplifier.
Power amplifier based on the high voltage great current operation amplifier comprises main amplifying circuit, auxiliary circuit and output unit; Wherein: main amplifying circuit comprises input buffer circuit, U/A change-over circuit, current expansion unit; Input buffer circuit one end links to each other with the U/A change-over circuit, the input buffer circuit other end links to each other with the D/A converter of upper PC, current expansion unit one end links to each other with the U/A change-over circuit, and the current expansion unit other end links to each other with the loading interfaces of floating in the output unit; Auxiliary circuit comprises voltage lift unit, the unrestrained interference units of gushing; Voltage lift unit one end and D.C. regulated power supply, the voltage lift unit other end links to each other with the U/A change-over circuit, and anti-surge interference units links to each other with the current expansion unit; Output unit comprises phase compensation unit, the loading interfaces of floating, sampling unit, feedback circuit, ground unit; Phase compensating circuit links to each other with the loading interfaces of floating, sampling unit, ground unit, and the loading interfaces of floating links to each other with feedback circuit, and feedback circuit links to each other with the U/A change-over circuit.
The internal module annexation of described U/A change-over circuit is: operational amplifier OPA541 pin 1 links to each other with an end of resistance R 3 and the end of adjustable resistance R1, the other end ground connection of resistance R 3, operational amplifier OPA541 pin 2 and resistance R 2, one end of resistance R 4 links to each other, the other end ground connection of resistance R 2, the other end of resistance R 4 links to each other with the end of sampling resistor Rf, operational amplifier OPA541 pin 3, operational amplifier OPA541 pin 4 links to each other with the e end of triode TIP127 in the voltage lift unit, operational amplifier OPA541 pin 10, operational amplifier OPA541 pin 11 links to each other with the e end of triode TIP122 in the voltage lift unit, operational amplifier OPA541 pin 5, operational amplifier OPA541 pin 7 links to each other with the end of resistance R s, and operational amplifier OPA541 pin 8 links to each other with the other end of resistance R s.
The current expansion unit comprises field effect transistor, ± 50V D.C. regulated power supply, resistance R 10, one end of resistance R 11 links to each other with the pin 8 of operational amplifier OPA541, the other end of resistance R 10 and resistance R 9, resistance R 17, one end of resistance R 18 links to each other, the other end of resistance R 11 and resistance R 12, resistance R 19, one end of resistance R 20 links to each other, another termination power+Vcc of resistance R 9, resistance R 17, the other end of resistance R 18 respectively with the first field effect transistor IRF640T1, the pin G of the second field effect transistor IRF640T2 links to each other, the other end of resistance R 12 links to each other with power supply-Vcc, resistance R 19, the other end of resistance R 20 respectively with the first field effect transistor IRF9640T3, the pin G of the second field effect transistor IRF9640T4 links to each other, the first field effect transistor IRF640T1, the pin D of the second field effect transistor IRF640T2 links to each other with power supply+Vcc, the first field effect transistor IRF640T1, the pin S of the second field effect transistor IRF640T2 respectively with resistance R 15, one end of resistance R 13 links to each other, the first field effect transistor IRF9640T3, the pin D of the second field effect transistor IRF9640T4 links to each other with power supply-Vcc, the first field effect transistor IRF9640T3, the pin S of the second field effect transistor IRF9640T4 respectively with resistance R 14, one end of resistance R 16 links to each other, and the other end of resistance R 13～resistance R 16 connects.
The circuit of voltage lift unit is: the pin c of triode TIP122 links to each other with an end of power supply+Vcc, resistance R 5, the pin b of triode TIP122 links to each other with an end of the other end of resistance R 5, resistance R 6, the pin c of triode TIP127 links to each other with an end of power supply-Vcc, resistance R 8, the pin b of triode TIP127 links to each other with an end of the other end of resistance R 8, resistance R 7, and the other end of resistance R 6, resistance R 7 links to each other with the pin 8 of operational amplifier OPA541; The positive pole of diode D1 links to each other with power supply-Vcc in the anti-surge interference units, the negative pole of diode D1 links to each other with an end of resistance R 23, the negative pole of diode D2 links to each other with power supply+Vcc, the positive pole of diode D2 links to each other with an end of resistance R 22, and the other end of resistance R 22, resistance R 23 links to each other with the other end of resistance R 15, resistance R 16.
Input signal of the present utility model can be a signal generator or by the arbitrary signal that computer program control is sent, and has characteristics such as wide accommodation, degree of flexibility height.Powerful arithmetic unit OPA541 and power MOSFET in the design of this constant-current power amplifier, have been adopted, and the mode that adopts triode to promote amplifier output voltage and the shunting in parallel of multi-disc power MOSFET is connected, and has power output height, characteristics that electric current is big.Adopt anti-surge interfered circuit, it is little to have a shock effect, the characteristics that starting performance is good.Integrated circuit has linearity height, and voltage regulation is low, load regulation and the time float little, signal to noise ratio height, the characteristics that response speed is fast.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is based on the power amplifier circuit block diagram of high voltage great current operation amplifier;
Fig. 2 is U/I change-over circuit figure of the present utility model;
Fig. 3 is current expansioning circuit figure of the present utility model;
Fig. 4 is voltage lifting circuit figure of the present utility model;
Fig. 5 is anti-surge interfered circuit figure of the present utility model.
Embodiment
As shown in Figure 1, the power amplifier based on the high voltage great current operation amplifier comprises main amplifying circuit, auxiliary circuit and output unit; Wherein: main amplifying circuit comprises input buffer circuit, U/A change-over circuit, current expansion unit; Input buffer circuit one end links to each other with the U/A change-over circuit, the input buffer circuit other end links to each other with the D/A converter of upper PC, current expansion unit one end links to each other with the U/A change-over circuit, and the current expansion unit other end links to each other with the loading interfaces of floating in the output unit; Auxiliary circuit comprises voltage lift unit, the unrestrained interference units of gushing; Voltage lift unit one end and D.C. regulated power supply, the voltage lift unit other end links to each other with the U/A change-over circuit, and anti-surge interference units links to each other with the current expansion unit; Output unit comprises phase compensation unit, the loading interfaces of floating, sampling unit, feedback circuit, ground unit; Phase compensating circuit links to each other with the loading interfaces of floating, sampling unit, ground unit, and the loading interfaces of floating links to each other with feedback circuit, and feedback circuit links to each other with the U/A change-over circuit.
As shown in Figure 2, the internal module annexation of U/A change-over circuit is: operational amplifier OPA541 pin 1 links to each other with an end of resistance R 3 and the end of adjustable resistance R1, the other end ground connection of resistance R 3, operational amplifier OPA541 pin 2 and resistance R 2, one end of resistance R 4 links to each other, the other end ground connection of resistance R 2, the other end of resistance R 4 links to each other with the end of sampling resistor Rf, operational amplifier OPA541 pin 3, operational amplifier OPA541 pin 4 links to each other with the e end of triode TIP127 in the voltage lift unit, operational amplifier OPA541 pin 10, operational amplifier OPA541 pin 11 links to each other with the e end of triode TIP122 in the voltage lift unit, operational amplifier OPA541 pin 5, operational amplifier OPA541 pin 7 links to each other with the end of resistance R s, and operational amplifier OPA541 pin 8 links to each other with the other end of resistance R s.Resistance R s is little resistance precision resistance, and OPA541 provides current-limiting protection for operational amplifier, and resistance R 1 is the accurate adjustable resistance of multi-turn, and the resistance of resistance R 2, resistance R 3, resistance R 4 equates.
As shown in Figure 3, the current expansion unit comprises field effect transistor, ± 50V D.C. regulated power supply, resistance R 10, one end of resistance R 11 links to each other with the pin 8 of operational amplifier OPA541, the other end of resistance R 10 and resistance R 9, resistance R 17, one end of resistance R 18 links to each other, the other end of resistance R 11 and resistance R 12, resistance R 19, one end of resistance R 20 links to each other, another termination power+Vcc of resistance R 9, resistance R 17, the other end of resistance R 18 respectively with the first field effect transistor IRF640T1, the pin G of the second field effect transistor IRF640T2 links to each other, the other end of resistance R 12 links to each other with power supply-Vcc, resistance R 19, the other end of resistance R 20 respectively with the first field effect transistor IRF9640T3, the pin G of the second field effect transistor IRF9640T4 links to each other, the first field effect transistor IRF640TI, the pin D of the second field effect transistor IRF640T2 links to each other with power supply+Vcc, the first field effect transistor IRF640T1, the pin S of the second field effect transistor IRF640T2 respectively with resistance R 15, one end of resistance R 13 links to each other, the first field effect transistor IRF9640T3, the pin D of the second field effect transistor IRF9640T4 links to each other with power supply-Vcc, the first field effect transistor IRF9640T3, the pin S of the second field effect transistor IRF9640T4 respectively with resistance R 14, one end of resistance R 16 links to each other, and the other end of resistance R 13～resistance R 16 connects.D.C. regulated power supply provides power supply for field effect transistor T1～T4; Resistance R 17～resistance R 20 resistances equate, are precision resistance, and resistance R 13～resistance R 16 resistances equate, are high-power little resistance resistance.
As shown in Figure 4, the circuit of voltage lift unit is: the pin c of triode TIP122 links to each other with an end of power supply+Vcc, resistance R 5, the pin b of triode TIP122 links to each other with an end of the other end of resistance R 5, resistance R 6, the pin c of triode TIP127 links to each other with an end of power supply-Vcc, resistance R 8, the pin b of triode TIP127 links to each other with an end of the other end of resistance R 8, resistance R 7, and the other end of resistance R 6, resistance R 7 links to each other with the pin 8 of operational amplifier OPA541; The positive pole of diode D1 links to each other with power supply-Vcc in the anti-surge interference units, the negative pole of diode D1 links to each other with an end of resistance R 23, the negative pole of diode D2 links to each other with power supply+Vcc, the positive pole of diode D2 links to each other with an end of resistance R 22, and the other end of resistance R 22, resistance R 23 links to each other with the other end of resistance R 15, resistance R 16.Resistance R 5～R8 resistance equates.
As shown in Figure 5, anti-surge interference units (2.2) is made up of diode and resistance, links to each other with the current expansion unit.
Voltage signal exports input buffer circuit to by input unit, export adjustable resistance R1 in the U/A change-over circuit to by input buffer cell then, enter operational amplifier OPA541 pin 1 through adjustable resistance R1, the current signal after operational amplifier OPA541 pin 8 is changed through U/A with the link output of resistance R s.When the electric current of operational amplifier OPA541 pin 8 and the link output of resistance R s be on the occasion of the time, positive current enters resistance R 10, on average enter resistance R 17 then, resistance R 18, the electric current of the resistance R of flowing through 17 enters the first field effect transistor IRF640T1 pin G, after amplifying, electric current flows out from the first field effect transistor IRF640T1 pin S, enter resistance R 15, the electric current of the resistance R of flowing through 18 enters the second field effect transistor IRF640T2 pin G, after amplifying, electric current flows out from the second field effect transistor IRF640T2 pin S, enter resistance R 13, resistance R 13, be input to the input of loading interfaces after the output current addition of resistance R 15, be carried in this moment in the load is positive current; When the electric current of operational amplifier OPA541 pin 8 and the link output of resistance R s is negative value, negative current enters resistance R 11, on average enter resistance R 19 then, resistance R 20, the electric current of R19 of flowing through enters the first field effect transistor IRF9640T3 pin G, after amplifying, electric current flows out from the first field effect transistor IRF9640T3 pin S, enter resistance R 14, the electric current of the resistance R of flowing through 20 enters the second field effect transistor IRF9640T4 pin G, after amplifying, electric current flows out from the second field effect transistor IRF9640T4 pin S, enter resistance R 16, resistance R 14, be input to the input of loading interfaces after the output current addition of resistance R 16, be carried in this moment in the load is negative current;
Current signal is after overload, and from the output output of loading interfaces, an output current part enters sampling resistor Rf, and output current forms the loop through Rf ground connection, and output current another part enters operational amplifier OPA541 pin 2 through resistance R 4 feedbacks.
Claims (4)
1. the power amplifier based on the high voltage great current operation amplifier is characterized in that comprising main amplifying circuit, auxiliary circuit and output unit; Wherein: main amplifying circuit comprises input buffer circuit, U/A change-over circuit, current expansion unit; Input buffer circuit one end links to each other with the U/A change-over circuit, the input buffer circuit other end links to each other with the D/A converter of upper PC, current expansion unit one end links to each other with the U/A change-over circuit, and the current expansion unit other end links to each other with the loading interfaces of floating in the output unit; Auxiliary circuit comprises voltage lift unit, the unrestrained interference units of gushing; Voltage lift unit one end and D.C. regulated power supply, the voltage lift unit other end links to each other with the U/A change-over circuit, and anti-surge interference units links to each other with the current expansion unit; Output unit comprises phase compensation unit, the loading interfaces of floating, sampling unit, feedback circuit, ground unit; Phase compensating circuit links to each other with the loading interfaces of floating, sampling unit, ground unit, and the loading interfaces of floating links to each other with feedback circuit, and feedback circuit links to each other with the U/A change-over circuit.
2. a kind of power amplifier according to claim 1 based on the high voltage great current operation amplifier, the internal module annexation that it is characterized in that described U/A change-over circuit is: operational amplifier OPA541 pin 1 links to each other with an end of resistance R 3 and the end of adjustable resistance R1, the other end ground connection of resistance R 3, operational amplifier OPA541 pin 2 and resistance R 2, one end of resistance R 4 links to each other, the other end ground connection of resistance R 2, the other end of resistance R 4 links to each other with the end of sampling resistor Rf, operational amplifier OPA541 pin 3, operational amplifier OPA541 pin 4 links to each other with the e end of triode TIP127 in the voltage lift unit, operational amplifier OPA541 pin 10, operational amplifier OPA541 pin 11 links to each other with the e end of triode TIP122 in the voltage lift unit, operational amplifier OPA541 pin 5, operational amplifier OPA541 pin 7 links to each other with the end of resistance R s, and operational amplifier OPA541 pin 8 links to each other with the other end of resistance R s.
3. a kind of power amplifier according to claim 1 based on the high voltage great current operation amplifier, it is characterized in that described current expansion unit comprises field effect transistor, ± 50V D.C. regulated power supply, resistance R 10, one end of resistance R 11 links to each other with the pin 8 of operational amplifier OPA541, the other end of resistance R 10 and resistance R 9, resistance R 17, one end of resistance R 18 links to each other, the other end of resistance R 11 and resistance R 12, resistance R 19, one end of resistance R 20 links to each other, another termination power+Vcc of resistance R 9, resistance R 17, the other end of resistance R 18 respectively with the first field effect transistor IRF640 T1, the pin G of the second field effect transistor IRF640 T2 links to each other, the other end of resistance R 12 links to each other with power supply-Vcc, resistance R 19, the other end of resistance R 20 respectively with the first field effect transistor IRF9640 T3, the pin G of the second field effect transistor IRF9640 T4 links to each other, the first field effect transistor IRF640 T1, the pin D of the second field effect transistor IRF640 T2 links to each other with power supply+Vcc, the first field effect transistor IRF640 T1, the pin S of the second field effect transistor IRF640 T2 respectively with resistance R 15, one end of resistance R 13 links to each other, the first field effect transistor IRF9640 T3, the pin D of the second field effect transistor IRF9640 T4 links to each other with power supply-Vcc, the first field effect transistor IRF9640 T3, the pin S of the second field effect transistor IRF9640 T4 respectively with resistance R 14, one end of resistance R 16 links to each other, and the other end of resistance R 13～resistance R 16 connects.
4. a kind of power amplifier according to claim 1 based on the high voltage great current operation amplifier, the circuit that it is characterized in that described voltage lift unit is: pin c and the power supply+Vcc of triode TIP122, one end of resistance R 5 links to each other, the pin b of triode TIP122 and the other end of resistance R 5, one end of resistance R 6 links to each other, pin c and the power supply-Vcc of triode TIP127, one end of resistance R 8 links to each other, the pin b of triode TIP127 and the other end of resistance R 8, one end of resistance R 7 links to each other, resistance R 6, the other end of resistance R 7 links to each other with the pin 8 of operational amplifier OPA541; The positive pole of diode D1 links to each other with power supply-Vcc in the anti-surge interference units, the negative pole of diode D1 links to each other with an end of resistance R 23, the negative pole of diode D2 links to each other with power supply+Vcc, the positive pole of diode D2 links to each other with an end of resistance R 22, and the other end of resistance R 22, resistance R 23 links to each other with the other end of resistance R 15, resistance R 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201072835U CN201018459Y (en) | 2007-03-15 | 2007-03-15 | Power amplifier based on high voltage great current operation amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201072835U CN201018459Y (en) | 2007-03-15 | 2007-03-15 | Power amplifier based on high voltage great current operation amplifier |
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| Publication Number | Publication Date |
|---|---|
| CN201018459Y true CN201018459Y (en) | 2008-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201072835U Expired - Lifetime CN201018459Y (en) | 2007-03-15 | 2007-03-15 | Power amplifier based on high voltage great current operation amplifier |
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| CN (1) | CN201018459Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101014A (en) * | 2022-01-25 | 2022-03-01 | 深圳市大族光电设备有限公司 | Drive circuit, semiconductor wire bonding machine and bootstrap circuit of ultrasonic transducer |
-
2007
- 2007-03-15 CN CNU2007201072835U patent/CN201018459Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101014A (en) * | 2022-01-25 | 2022-03-01 | 深圳市大族光电设备有限公司 | Drive circuit, semiconductor wire bonding machine and bootstrap circuit of ultrasonic transducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20070315 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |