CN204304937U - electron tube power amplifier - Google Patents
electron tube power amplifier Download PDFInfo
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- CN204304937U CN204304937U CN201420838336.0U CN201420838336U CN204304937U CN 204304937 U CN204304937 U CN 204304937U CN 201420838336 U CN201420838336 U CN 201420838336U CN 204304937 U CN204304937 U CN 204304937U
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Abstract
The utility model discloses a kind of electron tube power amplifier, comprise negative electrode input difference phase inverter and superlinearity push-pull circuit, described negative electrode input difference phase inverter comprises high pass filter, triode G1-A and triode G1-B, the output of described high pass filter is connected respectively to the negative electrode of triode G1-A and the grid of triode G1-B, the negative electrode of described triode G1-B is connected to the grid of triode G1-A, the anode of described triode G1-A and triode G1-B is connected to the input of superlinearity push-pull circuit, the output of described superlinearity push-pull circuit is connected with loudspeaker.The prime of power amplifier of the present utility model adopts negative electrode input and difference paraphase, reduce the impedance of prime electron tube, decrease the impact of ambient noise, rear class adopts superlinearity to recommend, effectively the distortion factor is reduced when keeping power, make complete machine have the tone color of courage machine and the dynamics of stone machine, enhance the acoustics of complete machine.
Description
Technical field
The utility model relates to a kind of electron tube power amplifier, belongs to sound appliances technical field.
Background technology
Electron tube power amplifier is mainly used in sound equipment broadcasting, the impedance of existing electron tube power amplifier ubiquity prime is higher, easily sensing ambient noise and the rear class shortcoming that the distortion factor is larger when keeping power, having had a strong impact on the acoustical quality of audio frequency.
Utility model content
The deficiency that the utility model exists to overcome prior art, provides a kind of electron tube power amplifier.
The utility model is achieved by taking following technical scheme:
A kind of electron tube power amplifier, comprise negative electrode input difference phase inverter and superlinearity push-pull circuit, described negative electrode input difference phase inverter comprises high pass filter, triode G1-A and triode G1-B, the output of described high pass filter is connected respectively to the negative electrode of triode G1-A and the grid of triode G1-B, the negative electrode of described triode G1-B is connected to the grid of triode G1-A, the anode of described triode G1-A and triode G1-B is connected to the input of superlinearity push-pull circuit, and the output of described superlinearity push-pull circuit is connected with loudspeaker.
Preferably, described high pass filter comprises electric capacity C1, resistance R5 and resistance VR2, one end of described electric capacity C1 is connected with signal output part, ground connection after its other end series resistor R5 and resistance VR2, and the other end of described electric capacity C1 is connected to the negative electrode of triode G1-A and the grid of triode G1-B.
Preferably, described superlinearity push-pull circuit comprises triode G2-A, triode G2-B, tetrode G3, tetrode G4 and transformer, the grid of described triode G2-A is connected with the anode of triode G1-B, its negative electrode is connected with the negative electrode of G2-B and ground connection, its anode is connected with the control gate of tetrode G3, the grid of described triode G2-B is connected with the anode of triode G1-A, its anode is connected with the control gate of tetrode G4, the anode of described tetrode G3 and screen grid are connected on one end of the input of transformer, its negative electrode is connected with the negative electrode of tetrode G4 and ground connection, the anode of described tetrode G4 and screen grid are connected on the other end of the input of transformer, the output of described transformer is connected with loudspeaker, by the waveform of each responsible positive-negative half-cycle of triode G2-A and triode G2-B, again through tetrode G3, G4 correspondence is delivered to loudspeaker through transformer after amplifying and exports.
Preferably, this electron tube power amplifier also comprises feedback circuit, described feedback circuit is connected between the output of transformer and the grid of triode G1-A, wherein, described feedback circuit comprises resistance R15 and electric capacity C6, is connected between the output of transformer and the grid of triode G1-A after described resistance R15 serial capacitance C6.Electric capacity C6 impedance when low frequency is higher, the feedback network formed with resistance R15, and designing gain is greater than circuit overall gain, makes it work under equivalence is without negative feedback state, improves low frequency transient intermodulation distortion; Electric capacity C6 impedance when high frequency is lower, the feedback network formed with resistance R15, and designing gain is less than overall gain, and electric capacity C6 is fed back to large loop negative feedback at high frequency, can widen high-end frequency response, reduces circuit distortion.
Compared with prior art, the beneficial effects of the utility model are: the prime of power amplifier of the present utility model adopts negative electrode input and difference paraphase, reduce the impedance of prime electron tube, decrease the impact of ambient noise, rear class adopts superlinearity to recommend, effectively reducing the distortion factor when keeping power, making complete machine have the tone color of courage machine and the dynamics of stone machine, enhancing the acoustics of complete machine.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of electron tube power amplifier of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, most preferred embodiment of the present utility model is described in detail.
As shown in Figure 1, the electron tube power amplifier of the present embodiment comprises negative electrode input difference phase inverter, superlinearity push-pull circuit and feedback circuit, described negative electrode input difference phase inverter comprises high pass filter, triode G1-A and triode G1-B, described high pass filter comprises electric capacity C1, resistance R5 and resistance VR2, one end of described electric capacity C1 is connected with signal output part, ground connection after its other end series resistor R5 and resistance VR2, described superlinearity push-pull circuit comprises triode G2-A, triode G2-B, tetrode G3, tetrode G4 and transformer, described feedback circuit comprises resistance R15 and electric capacity C6, wherein, the output of electric capacity C1 is as the output of high pass filter, it is connected to the negative electrode of triode G1-A and the grid of triode G1-B, the negative electrode of described triode G1-B is connected to the grid of triode G1-A, the anode of described triode G1-A and triode G1-B is connected respectively to the grid of triode G2-B and G2-A, the described negative electrode of triode G2-A is connected with the negative electrode of G2-B and ground connection, its anode is connected with the control gate of tetrode G3, the anode of described triode G2-B is connected with the control gate of tetrode G4, the anode of described tetrode G3 and screen grid are connected on one end of the input of transformer, its negative electrode is connected with the negative electrode of tetrode G4 and ground connection, the anode of described tetrode G4 and screen grid are connected on the other end of the input of transformer, the output of described transformer is connected with loudspeaker, described feedback circuit comprises resistance R15 and electric capacity C6, is connected between the output of transformer and the grid of triode G1-A after described resistance R15 serial capacitance C6.In the present embodiment, triode G1-A and G1-B, G2-A and G2-B of prime adopt the double-triode valve 6SL7 that courage taste is denseer, tetrode G3 and G4 of rear class adopts the KT88 that low frequency dint degree is large, like this, both utilized and improved final stage load impedance, extended the linear zone of tetreode KT88, reduce circuit distortion, can utilize double-triode valve 6SL7 again, the courage taste making up KT88 is not enough, and negative electrode input circuit can make up again the dynamically not enough defect of 6SL7 simultaneously.To the power loss that raising load impedance causes, then the mode of available raising supply power voltage makes up.
The course of work of the electron tube power amplifier of the present embodiment is as follows: electric capacity C1 is as input coupling capacitance, jointly high pass filter is formed with resistance R5 and resistance VR2, below 30Hz low frequency signal in the audio signal of decay input, to make up low frequency without the too small defect of resistance Buddhist nun time negative, the definition of deduction low frequency part sound.Signal is leaded up to the grid of triode G1-B after filtering afterwards and has been inputted difference paraphase, another road is inputted by the negative electrode of triode G1-A through resistance R3, feedback is formed by the current mirror of difference channel, reduce input impedance (gain decline), make that input impedance is low reaches 15K, compensate for the defect of the easy induction ambient noise of electronic tube power amplifier high resistant input, simultaneously, difference channel effectively can control the hum that power supply ripple produces, and makes the signal to noise ratio of electronic tube power amplifier accomplish more than 90dB.Signal is delivered to superlinearity push-pull circuit and amplifies after triode G1-A and triode G1-B, now, the amplification task of the waveform signal of each responsible positive-negative half-cycle of triode G2-A and triode G2-B also controls the work of tetrode G3 and tetrode G4 respectively, when triode G2-A conducting, triode G2-B ends, and triode G2-A controls tetrode G3 and amplifies input signal and output to loudspeaker through transformer again; Equally, when triode G2-B conducting, triode G2-A ends, and triode G2-B controls tetrode G4 and amplifies input signal and output to loudspeaker through transformer again.And electric capacity C6 impedance when low frequency is higher, the feedback network formed with resistance R15, designing gain is greater than circuit overall gain, makes it work under equivalence is without negative feedback state, improves low frequency transient intermodulation distortion; Electric capacity C6 impedance when high frequency is lower, the feedback network formed with resistance R15, and designing gain is less than overall gain, and electric capacity C6 is fed back to large loop negative feedback at high frequency, can widen high-end frequency response, and reduce circuit distortion, complete machine frequency response can reach 30Hz-80KHz.
Claims (5)
1. an electron tube power amplifier, it is characterized in that comprising negative electrode input difference phase inverter and superlinearity push-pull circuit, described negative electrode input difference phase inverter comprises high pass filter, triode G1-A and triode G1-B, the output of described high pass filter is connected respectively to the negative electrode of triode G1-A and the grid of triode G1-B, the negative electrode of described triode G1-B is connected to the grid of triode G1-A, the anode of described triode G1-A and triode G1-B is connected to the input of superlinearity push-pull circuit, the output of described superlinearity push-pull circuit is connected with loudspeaker.
2. electron tube power amplifier according to claim 1, it is characterized in that described high pass filter comprises electric capacity C1, resistance R5 and resistance VR2, one end of described electric capacity C1 is connected with signal output part, ground connection after its other end series resistor R5 and resistance VR2, and the other end of described electric capacity C1 is connected to the negative electrode of triode G1-A and the grid of triode G1-B.
3. electron tube power amplifier according to claim 1 and 2, it is characterized in that described superlinearity push-pull circuit comprises triode G2-A, triode G2-B, tetrode G3, tetrode G4 and transformer, the grid of described triode G2-A is connected with the anode of triode G1-B, its negative electrode is connected with the negative electrode of G2-B and ground connection, its anode is connected with the control gate of tetrode G3, the grid of described triode G2-B is connected with the anode of triode G1-A, its anode is connected with the control gate of tetrode G4, the anode of described tetrode G3 and screen grid are connected on one end of the input of transformer, its negative electrode is connected with the negative electrode of tetrode G4 and ground connection, the anode of described tetrode G4 and screen grid are connected on the other end of the input of transformer, the output of described transformer is connected with loudspeaker.
4. electron tube power amplifier according to claim 3, characterized by further comprising feedback circuit, and described feedback circuit is connected between the output of transformer and the grid of triode G1-A.
5. electron tube power amplifier according to claim 4, is characterized in that described feedback circuit comprises resistance R15 and electric capacity C6, is connected between the output of transformer and the grid of triode G1-A after described resistance R15 serial capacitance C6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420838336.0U CN204304937U (en) | 2014-12-22 | 2014-12-22 | electron tube power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420838336.0U CN204304937U (en) | 2014-12-22 | 2014-12-22 | electron tube power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204304937U true CN204304937U (en) | 2015-04-29 |
Family
ID=53110441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420838336.0U Active CN204304937U (en) | 2014-12-22 | 2014-12-22 | electron tube power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204304937U (en) |
-
2014
- 2014-12-22 CN CN201420838336.0U patent/CN204304937U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510000, Guangzhou, Guangdong province Huadu District charcoal step Feida Industrial Park Patentee after: GUANGZHOU FEIDA SOUND CO., LTD. Address before: 510000, Guangzhou, Guangdong province Huadu District charcoal step Feida Industrial Park Patentee before: Guangzhou Fidek Professional Audio Equipment Co., Ltd. |