CN2884678Y - Driver element circuit of special large power high frequency switching power source for power magnification - Google Patents
Driver element circuit of special large power high frequency switching power source for power magnification Download PDFInfo
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- CN2884678Y CN2884678Y CN 200520065072 CN200520065072U CN2884678Y CN 2884678 Y CN2884678 Y CN 2884678Y CN 200520065072 CN200520065072 CN 200520065072 CN 200520065072 U CN200520065072 U CN 200520065072U CN 2884678 Y CN2884678 Y CN 2884678Y
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- resistance
- power supply
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- power
- triode
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Abstract
The utility model discloses an excitation unit circuit with high-power high-frequency switching power supply specially used for power amplifier, comprising a PNP-type transistor, NPN-type transistor, first resistor, second resistor, third resistor, fourth resistor and capacitor, and the excitation unit circuit is used in the high-power high-frequency switching power supply specially used for power amplifier, and can adjust switching pulse width in the switching power supply circuit to the maximum width and the constant, and a feedback magnetic ring loop or the small loop feedback oscillation loop is introduced at the high voltage power supply loop terminal in the main switching circuit and the high-frequency switching transformer to achieve the working stability of the entire power supply, realizing large transient output current, with excellent transient state response.
Description
Technical field
The utility model relates to a kind of circuit devcie, particularly a kind of exciting unit circuit that is exclusively used in the high-power high-frequency switch power supply of stereo set power amplifier.
Background technology
At present, nearly all Switching Power Supply product all be " by the voltage of output direct current, through the size of load consumption energy feed back to the pulse duration that changes switching tube of making a return journey adjust realize voltage stabilizing " purpose because the load of these products is metastable.And power amplifier is different, and its load is floated, and most critical is transient state to export big electric current, and what voltage can also be relative floats.
Summary of the invention
The purpose of this utility model is to provide a kind of transient state that can realize to export the exciting unit circuit of the special-purpose high-power high-frequency switch power supply of power amplifier of big electric current.
The technical scheme that its technical problem that solves the utility model adopts is:
The exciting unit circuit of the special-purpose high-power high-frequency switch power supply of power amplifier, it is characterized in that: this exciting unit circuit comprises the positive-negative-positive triode, NPN type triode, first resistance, second resistance, the 3rd resistance, the 4th resistance and electric capacity, the base stage of positive-negative-positive triode connects the collector electrode of NPN type triode, and be connected to main power source input pin 4 and accessory power supply input pin 3 by the 4th resistance, the emitter of positive-negative-positive triode is connected to main power source input pin 4 and accessory power supply input pin 3 equally, the collector electrode of positive-negative-positive triode connects the base stage of NPN type triode, and be connected to first pulse signal output end by electric capacity, be connected to second pulse signal output end by first resistance, the grounded emitter of NPN type triode and be connected to first pulse signal output end, second resistance is connected between the emitter and second pulse signal output end of positive-negative-positive triode, and the 3rd resistance is connected first resistance, between the interface point of second resistance and first pulse signal output end.
The beneficial effects of the utility model are: with exciting unit circuit application of the present utility model on the special-purpose high-power high-frequency switch power supply of power amplifier, can transfer to the switching tube pulsewidth in the switching power circuit the wideest and constant, seal in feedback magnet ring loop at switch major loop and high frequency switch transformer at high voltage source loop end, it is the minor loop feedback oscillation loop, realize the working stability of whole power supply, it can realize that transient state exports big electric current, and transient response is splendid.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is the special-purpose high-power high-frequency switch power circuit of power amplifier of using exciting unit circuit of the present utility model.
Embodiment
With reference to Fig. 1, the exciting unit circuit of the special-purpose high-power high-frequency switch power supply of power amplifier, this exciting unit circuit comprises positive-negative-positive triode Q1, NPN type triode Q2, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 and capacitor C 1, the base stage of positive-negative-positive triode Q1 connects the collector electrode of NPN type triode Q2, and be connected to main power source input pin 4 and accessory power supply input pin 3 by the 4th resistance R 4, the emitter of positive-negative-positive triode Q1 is connected to main power source input pin 4 and accessory power supply input pin 3 equally, the collector electrode of positive-negative-positive triode Q1 connects the base stage of NPN type triode Q2, and be connected to first pulse signal output end by capacitor C 1, be connected to second pulse signal output end by first resistance R 1, the grounded emitter of NPN type triode Q2 and be connected to first pulse signal output end, second resistance R 2 is connected between the emitter and second pulse signal output end of positive-negative-positive triode Q1, and the 3rd resistance R 3 is connected first resistance R 1, between the interface point of second resistance R 2 and first pulse signal output end.
Exciting unit circuit of the present utility model can adopt outside as shown in Figure 1 the concrete electronic component form, can also be integrated on the chip piece ic chip 3 as shown in Figure 2 according to its principle.
And with reference to Fig. 2, exciting unit circuit application of the present utility model is when power amplifier special use high-power high-frequency switch power supply, and this switching power circuit comprises a current rectifying and wave filtering circuit, and it connects electric network source, produces single high voltage direct current; One switch major loop, it is used to import high voltage direct current, produces the output of dither direct current; One high frequency switch transformer, it is used for the high frequency pulse dc of input is converted to high-frequency ac; One supper-fast current rectifying and wave filtering circuit, it is connected in the output of high frequency switch transformer, with high-frequency pulse voltage rectification, filtering, produces the DC power supply of using for power amplifier; And the output of exciting unit circuit (being IC3) connects the switch major loop, the exciting unit self-excitation produces a driving pulse frequency that remains unchanged, output to the switch major loop, the switch major loop will transfer the dither direct current to by the high voltage direct current of current rectifying and wave filtering circuit input.
In addition, switch major loop and high frequency switch transformer seal in feedback magnet ring loop at high voltage source loop end, realize the working stability of whole power supply.
Be provided with testing circuit and protective circuit between feedback loop and the switch major loop.
In foregoing circuit, the switch major loop comprises transistor Q1, Q2 and oscillation transformer T1, and feedback magnet ring loop comprises transformer T2; High frequency switch transformer comprises transformer T3, and supper-fast rectification filtering unit comprises diode D14, D15, D16, D17 and capacitor C 16, C17, C18, C19, and the one end is connected in high frequency switch transformer, and the other end connects power output end CON6, CON7.
In addition, the output for accessory power supply be can on high frequency switch transformer, set up, power output end CON9, CON10 met by regulator rectifier circuit as 16,17 pin of transformer T3.
Adopt the special-purpose high-power high-frequency switch power supply of power amplifier of the utility model exciting unit circuit, the switching tube pulsewidth can be transferred to the wideest and constant by exciting unit, seal in feedback magnet ring loop at switch major loop and high frequency switch transformer at high voltage source loop end, it is the minor loop feedback oscillation loop, realize the working stability of whole power supply, it can realize that transient state exports big electric current, and transient response is splendid.
Claims (1)
1, the exciting unit circuit of the special-purpose high-power high-frequency switch power supply of power amplifier, it is characterized in that: this exciting unit circuit comprises positive-negative-positive triode (Q1), NPN type triode (Q2), first resistance (R1), second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4) and electric capacity (C1), the base stage of positive-negative-positive triode (Q1) connects the collector electrode of NPN type triode (Q2), and be connected to main power source input pin (4) and accessory power supply input pin (3) by the 4th resistance (R4), the emitter of positive-negative-positive triode (Q1) is connected to main power source input pin (4) and accessory power supply input pin (3) equally, the collector electrode of positive-negative-positive triode (Q1) connects the base stage of NPN type triode (Q2), and be connected to first pulse signal output end by electric capacity (C1), (R1) is connected to second pulse signal output end by first resistance, the grounded emitter of NPN type triode (Q2) and be connected to first pulse signal output end, second resistance (R2) is connected between the emitter and second pulse signal output end of positive-negative-positive triode (Q1), and the 3rd resistance (R3) is connected first resistance (R1), between the interface point and first pulse signal output end of second resistance (R2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520065072 CN2884678Y (en) | 2005-09-24 | 2005-09-24 | Driver element circuit of special large power high frequency switching power source for power magnification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520065072 CN2884678Y (en) | 2005-09-24 | 2005-09-24 | Driver element circuit of special large power high frequency switching power source for power magnification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2884678Y true CN2884678Y (en) | 2007-03-28 |
Family
ID=37957729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520065072 Expired - Fee Related CN2884678Y (en) | 2005-09-24 | 2005-09-24 | Driver element circuit of special large power high frequency switching power source for power magnification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2884678Y (en) |
-
2005
- 2005-09-24 CN CN 200520065072 patent/CN2884678Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070328 Termination date: 20100924 |