CN220273644U - Push-pull electron tube power amplifier circuit - Google Patents
Push-pull electron tube power amplifier circuit Download PDFInfo
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- CN220273644U CN220273644U CN202321879258.4U CN202321879258U CN220273644U CN 220273644 U CN220273644 U CN 220273644U CN 202321879258 U CN202321879258 U CN 202321879258U CN 220273644 U CN220273644 U CN 220273644U
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- triode
- power amplifier
- amplifier circuit
- electron tube
- resistor
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- 239000003990 capacitor Substances 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims description 11
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Abstract
The utility model discloses a push-pull electron tube power amplifier circuit, comprising: the input end is used for connecting an input signal; the electron tube power amplifier circuit module is used for amplifying signals and generating sound; the pushing stage circuit module is used for receiving signals of an input end and providing negative bias voltage to drive the valve power amplifier circuit module to work; the boost stage circuit module comprises a triode T5 and a triode T6, and the triode T5 and the triode T6 are PNP triodes; the base of the triode T5 is connected with the input end, the base of the triode T6 is grounded after being sequentially connected with a resistor Rf2 and a capacitor C2, the collector of the triode T5 is connected with the collector of the triode T6 and externally connected with a negative voltage source, the emitter of the triode T5 is connected with the emitter of the triode T6 and externally connected with a positive voltage source, the input end is connected on the base of the triode T5, and the triode power amplifier circuit module is connected with the collector of the triode T5 and the collector of the triode T6. The technical scheme does not need a coupling capacitor, and has low cost and low efficacy.
Description
Technical Field
The utility model relates to the technical field of electron tube power amplifier circuits, in particular to a push-pull electron tube power amplifier circuit.
Background
In audio amplifiers and audio box systems, it is often necessary to use a valve power amplifier circuit, which is capable of producing a warm and harmonious tone, with a high praise from music lovers. The electron tube needs to be driven by negative bias, and many existing schemes are realized by adding a group of negative bias power supplies, but the cost is increased by adopting the mode, and some manufacturers directly adopt the final stage electron tube cathode resistance self-bias to drive, however, the power consumption is larger in the mode, and the output power is greatly reduced.
Disclosure of Invention
In view of the above, it is necessary to provide a push-pull valve power amplifier circuit to solve the problem of higher cost or higher power consumption of the existing valve power amplifier circuit.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: a push-pull valve power amplifier circuit comprising:
the input end is used for connecting an input signal;
the electron tube power amplifier circuit module is used for amplifying signals and generating sound;
the pushing stage circuit module is used for receiving signals of an input end and providing negative bias voltage to drive the valve power amplifier circuit module to work;
the boost stage circuit module comprises a triode T5 and a triode T6, and the triode T5 and the triode T6 are PNP triodes;
the base electrode of the triode T5 is connected with the input end, the base electrode of the triode T6 is grounded after being sequentially connected with a resistor Rf2 and a capacitor C2, the collector electrode of the triode T5 is connected with the collector electrode of the triode T6 and externally connected with a negative voltage source, and the emitter electrode of the triode T5 is connected with the emitter electrode of the triode T6 and externally connected with a positive voltage source;
the input end is connected to the base electrode of the triode T5, and the electron tube power amplifier circuit module is connected with the collector electrode of the triode T5 and the collector electrode of the triode T6.
In the push-pull electron tube power amplifier circuit, an electron tube power amplifier circuit module comprises an electron tube T1, an electron tube T2, a transformer T and a loudspeaker SP1;
the grid of the electron tube T1 and the grid of the electron tube T2 are respectively connected to the collector of the triode T6 and the collector of the triode T5;
the cathode of the electron tube T1 and the cathode of the electron tube T2 are respectively grounded after being connected with a resistor Rk1 and a resistor Rk 2;
the anode of the electron tube T1 and the anode of the electron tube T2 are respectively connected to two ends of a primary winding of the transformer T, the loudspeaker SP1 is connected to two ends of a secondary winding of the transformer T, and the anode of the secondary winding of the loudspeaker SP1 is also connected with the base electrode of the electron tube T6.
In the push-pull electron tube power amplifier circuit, an emitter of a triode T5 and an emitter of a triode T6 are respectively connected through a resistor Re1 and a resistor Re2 and then connected to a positive voltage source through a resistor R1.
In the push-pull electron tube power amplifier circuit, the collector of the triode T5 and the collector of the triode T6 are respectively connected with a resistor Rc1 and a resistor Rc2 and then connected with a negative voltage source.
The push-pull electron tube power amplifier circuit further comprises a capacitor C3, wherein the positive electrode of the capacitor C3 is respectively connected with the base electrode of the triode T5 and the base electrode of the triode T6, and the negative electrode of the capacitor C3 is respectively connected with the collector electrode of the triode T5 and the collector electrode of the triode T6.
In the push-pull electron tube power amplifier circuit, a long-load resistor Rin is also connected between an input end and a base electrode of a triode T5.
In the push-pull valve power amplifier circuit, the anode of the secondary winding of the loudspeaker SP1 is connected with the base electrode of the valve T6 through an RC feedback circuit, and the RC feedback circuit comprises a capacitor Cf and a resistor Rf1 which are connected in parallel.
Through the technical scheme, the utility model has the beneficial effects that:
1. the differential amplifying circuit is formed by the triode T5 and the triode T6, and because the triode T5 and the triode T6 are PNP triodes, amplified signals can be directly coupled with the electron tube power amplifier circuit module to drive the electron tube to work without coupling capacitance, and meanwhile, adverse effects caused by the fact that a negative bias power supply is required to be added or self-bias driving is adopted by the cathode resistance of the final stage electron tube in the existing scheme are avoided;
2. according to the utility model, the triode T5 and the triode T6 are adopted as the pushing stage circuit modules, so that the size is small, the power consumption is low, and the inconvenience that the whole size of a product is large and special power supply is required to a filament due to the fact that the electron tube is adopted as the pushing stage in the existing schemes is avoided.
Drawings
FIG. 1 is a schematic circuit diagram of an embodiment of the present utility model;
fig. 2 is a functional block diagram of an embodiment of the present utility model.
100. An input end; 200. a boost stage circuit module; 300. and the electron tube power amplifier circuit module.
Detailed Description
In order to make the objects, technical schemes and advantages of the present utility model more apparent, the following describes a push-pull valve power amplifier circuit in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1-2, a push-pull valve power amplifier circuit includes: an input terminal 100 for connecting an input signal; a valve power amplifier circuit module 300 for amplifying signals and generating sounds; the boost stage circuit module 200 is configured to receive the signal from the input terminal 100 and provide a negative bias voltage to drive the valve power amplifier circuit module 300 to operate; the boost stage circuit module 200 includes a triode T5 and a triode T6, where the triode T5 and the triode T6 are PNP triodes; the base of the triode T5 is connected with the input end, the base of the triode T6 is grounded after being sequentially connected with a resistor Rf2 and a capacitor C2, the collector of the triode T5 is connected with the collector of the triode T6 and externally connected with a negative voltage source, the emitter of the triode T5 is connected with the emitter of the triode T6 and externally connected with a positive voltage source, the input end 100 is connected to the base of the triode T5, and the electron tube power amplifier circuit module 300 is connected with the collector of the triode T5 and the collector of the triode T6. Preferably, the negative voltage source is-150V and the positive voltage source is +50V.
According to the technical scheme, the triode T5 and the triode T6 form a differential amplifying circuit, and because the triode T5 and the triode T6 are PNP triodes, amplified signals can be directly coupled with the electron tube power amplifier circuit module 300 to drive the electron tube to work without coupling capacitance, and meanwhile adverse effects caused by the fact that a negative bias power supply is required to be added or self-bias driving is adopted by the cathode resistance of the final stage electron tube in the existing scheme are avoided; in addition, the triode T5 and the triode T6 are adopted as the pushing stage circuit module 200, so that the size is small, the power consumption is low, and the inconvenience that the whole size of a product is large and special power supply to a filament is needed due to the fact that the electron tube is adopted as the pushing stage in the existing schemes is avoided.
In the present embodiment, the valve power amplifier circuit module 300 includes a valve T1, a valve T2, a transformer T, and a speaker SP1; the grid of the electron tube T1 and the grid of the electron tube T2 are respectively connected to the collector of the triode T6 and the collector of the triode T5; the cathode of the valve T1 and the cathode of the valve T2 are respectively connected with the resistor Rk1 and the resistor Rk2 and then grounded, and specifically, the resistor Rk1 and the resistor Rk2 mainly balance static working current under the condition that the valve T1 and the valve T2 are not perfectly matched. If the power amplifier sub-tubes are well-matched, both resistors can be omitted. The positive pole of electron tube T1, the positive pole of electron tube T2 are connected at transformer T's primary winding both ends respectively, and loudspeaker SP1 connects at transformer T's secondary winding both ends, and it can be understood that loudspeaker can produce warm, soft tone after the electron tube amplifier for the music is more active and the sense of reality. The push-stage circuit module formed by the triode T5 and the triode T6 can directly provide negative bias to drive the electron tube T1 and the electron tube T2.
In this embodiment, the emitter of the triode T5 and the emitter of the triode T6 are connected through the resistor Re1 and the resistor Re2 respectively, and then connected to the positive voltage source through the resistor R1, the resistor Re1 and the resistor Re2 are differential equalization resistors, and by selecting appropriate resistance values, the linearity and the common mode rejection ratio of the differential amplifier circuit can be maintained.
In this embodiment, the collector of the transistor T5 and the collector of the transistor T6 are connected to the resistor Rc1 and the resistor Rc2, respectively, and then to the negative voltage source. The resistors Rc1 and Rc2 are load resistors, and are used for adjusting current.
In this embodiment, the filter further includes a capacitor C3, where the positive electrode of the capacitor C3 is connected to the base electrode of the triode T5 and the base electrode of the triode T6 respectively, the negative electrode of the capacitor C3 is connected to the collector electrode of the triode T5 and the collector electrode of the triode T6 respectively, and the capacitor C3 can play a role in filtering.
In this embodiment, a long load resistor Rin is further connected between the input terminal 100 and the base of the transistor T5.
In this embodiment, the positive pole of the secondary winding of the horn SP1 is connected to the base of the valve T6 through an RC feedback circuit comprising a capacitor Cf and a resistor Rf1 in parallel to provide negative feedback.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. A push-pull valve power amplifier circuit, comprising:
an input (100) for connecting an input signal;
a valve power amplifier circuit module (300) for amplifying signals and generating sound;
a boost stage circuit module (200) for receiving the signal from the input terminal (100) and providing a negative bias voltage to drive the valve power amplifier circuit module (300) to operate;
the boost stage circuit module (200) comprises a triode T5 and a triode T6, wherein the triode T5 and the triode T6 are PNP triodes;
the base of triode T5 with input (100) are connected, the base of triode T6 is through connecting resistance Rf2, electric capacity C2 back ground in proper order, triode T5's collecting electrode with triode T6's collecting electrode is connected and is externally connected to the negative voltage source, triode T5's projecting pole with triode T6's projecting pole is connected and is externally connected to positive voltage source, input (100) are connected on triode T5's the base, electron tube power amplifier circuit module (300) with triode T5's collecting electrode the collecting electrode is connected.
2. The push-pull valve power amplifier circuit according to claim 1, wherein the valve power amplifier circuit module comprises a valve T1, a valve T2, a transformer T and a speaker SP1;
the grid electrode of the electron tube T1 and the grid electrode of the electron tube T2 are respectively connected to the collector electrode of the triode T6 and the collector electrode of the triode T5;
the cathode of the electron tube T1 and the cathode of the electron tube T2 are respectively grounded after being connected with a resistor Rk1 and a resistor Rk 2;
the anode of the electron tube T1 and the anode of the electron tube T2 are respectively connected to two ends of a primary winding of the transformer T, the loudspeaker SP1 is connected to two ends of a secondary winding of the transformer T, and the anode of the secondary winding of the loudspeaker SP1 is also connected with a base electrode of the electron tube T6.
3. The push-pull valve power amplifier circuit according to claim 1, wherein the emitter of the triode T5 and the emitter of the triode T6 are connected to the positive voltage source through a resistor R1 after being connected through a resistor Re1 and a resistor Re2, respectively.
4. The push-pull valve power amplifier circuit according to claim 1, wherein the collector of the triode T5 and the collector of the triode T6 are connected to the negative voltage source after being connected to a resistor Rc1 and a resistor Rc2, respectively.
5. The push-pull valve power amplifier circuit according to claim 1, further comprising a capacitor C3, wherein an anode of the capacitor C3 is connected to the base of the triode T5 and the base of the triode T6, respectively, and a cathode of the capacitor C3 is connected to the collector of the triode T5 and the collector of the triode T6, respectively.
6. A push-pull valve power amplifier circuit according to claim 1, characterized in that a long load resistor Rin is further connected between the input terminal (100) and the base of the transistor T5.
7. A push-pull valve power amplifier circuit according to claim 2, wherein the positive pole of the secondary winding of the horn SP1 is connected to the base of the valve T6 by an RC feedback circuit comprising a capacitor Cf and a resistor Rf1 in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321879258.4U CN220273644U (en) | 2023-07-17 | 2023-07-17 | Push-pull electron tube power amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321879258.4U CN220273644U (en) | 2023-07-17 | 2023-07-17 | Push-pull electron tube power amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220273644U true CN220273644U (en) | 2023-12-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321879258.4U Active CN220273644U (en) | 2023-07-17 | 2023-07-17 | Push-pull electron tube power amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220273644U (en) |
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2023
- 2023-07-17 CN CN202321879258.4U patent/CN220273644U/en active Active
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