CN204795596U - Broadcasting recording signal amplifier - Google Patents
Broadcasting recording signal amplifier Download PDFInfo
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- CN204795596U CN204795596U CN201520562257.6U CN201520562257U CN204795596U CN 204795596 U CN204795596 U CN 204795596U CN 201520562257 U CN201520562257 U CN 201520562257U CN 204795596 U CN204795596 U CN 204795596U
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Abstract
The utility model discloses a broadcasting recording signal amplifier, including microphone Y, potentiometre RP, electric capacity C1, resistance R1, triode VT1, transformer T and diode D1, potentiometre RP one end is connected to microphone Y one end, the microphone Y other end is connected respectively to the potentiometre RP other end, electric capacity C1, resistance R2, resistance R4, electric capacity C3, resistance R6, resistance R8, electric capacity C5, resistance R10, resistance R12, electric capacity C8, transformer T coil L2, anodal and the ground connection of electric capacity C10 and diode D2. The utility model discloses broadcasting recording signal amplifier audio signal with to transformer T coil L1, sends audio signal to recording head through the coupling of transformer T and records behind VT1-VT3 three -stage amplifier, and transformer T coil L2 and electric capacity C10 are parallelly connected for promoting high frequency signal, compensateing the high -frequency loss of the in -process of recording, diode D1 and D2 can arrive safe value, promotion circuit stability because of the spike voltage clamper that the leakage inductance produced with transformer T coil.
Description
Technical field
The utility model relates to a kind of signal amplifier, specifically a kind of sound program recording signal amplifier.
Background technology
A kind of means that recording is commonly used as broadcast medium, ensure that the grace of its tonequality is stablized is the emphasis that industry is paid close attention to always, but traditional sound program recording signal amplifier also exists following deficiency when processing small-signal: 1. the high-end instability of signal amplifier frequency; 2. circuit structure is complicated, and cost is high; 3. energy consumption is high.
Summary of the invention
The purpose of this utility model is to provide a kind of sound program recording signal amplifier, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of sound program recording signal amplifier, comprises microphone Y, potentiometer RP, electric capacity C1, resistance R1, triode VT1, transformer T and diode D1, described microphone Y one end connects potentiometer RP one end, and the potentiometer RP other end connects the microphone Y other end respectively, electric capacity C1, resistance R2, resistance R4, electric capacity C3, resistance R6, resistance R8, electric capacity C5, resistance R10, resistance R12, electric capacity C8, transformer T coil L2, electric capacity C10 and diode D2 positive pole ground connection, described potentiometer RP slide plate connects the electric capacity C1 other end and electric capacity C2 respectively, and the electric capacity C2 other end is contact resistance R1 respectively, resistance R2, resistance R11 and triode VT1 base stage, the resistance R11 other end connects electric capacity C7, the electric capacity C7 other end is connection transformer T coil L1 and triode VT3 collector electrode respectively, and triode VT3 emitter is the contact resistance R12 other end and the electric capacity C8 other end respectively, and triode VT3 base stage is contact resistance R9 respectively, electric capacity C6 and the resistance R10 other end, the electric capacity C6 other end is connecting triode VT2 collector electrode and resistance R7, the triode VT2 emitter contact resistance R8 other end and the electric capacity C5 other end respectively respectively, and triode VT2 base stage is contact resistance R5 respectively, electric capacity C4 and the resistance R6 other end, the electric capacity C4 other end is contact resistance R3 and triode VT1 collector electrode respectively, and triode VT1 emitter is the contact resistance R4 other end and the electric capacity C3 other end respectively, and the described resistance R1 other end is the contact resistance R3 other end respectively, the resistance R5 other end, the resistance R7 other end, the resistance R9 other end, the transformer T coil L1 other end and power supply VCC, the transformer T coil L2 other end connects the electric capacity C10 other end and diode D1 positive pole respectively, and diode D1 negative pole connects magnetic recording head and diode D2 negative pole respectively.
As further program of the utility model: described power supply VCC voltage is 3V.
As the utility model further scheme: described diode D2 is voltage stabilizing didoe.
Compared with prior art, the beneficial effects of the utility model are: the utility model sound program recording signal amplifier audio signal is added on transformer T coil L1 after VT1 ~ VT3 tri-grades amplifies, through transformer T coupling, audio signal is delivered to magnetic recording head to record, L2 is in parallel with electric capacity C10 for transformer T coil, in order to promote high-frequency signal, make up the high-frequency loss in Recording Process, the peak voltage clamper that transformer T coil can produce because of leakage inductance by diode D1 and D2, to safety value, promotes circuit stability; The collector electrode output feedack of VT3 is to the base stage of VT1, and for improving the frequency characteristic of amplifier, the output of this amplifier adopts the mode of transformer T transformation to compensate high-frequency signal, and circuit, by 3V low-voltage power supply, has the feature of little power consumption; Circuit structure is simple in addition, and cost is low, and volume is little, is applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of sound program recording signal amplifier.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of sound program recording signal amplifier, comprises microphone Y, potentiometer RP, electric capacity C1, resistance R1, triode VT1, transformer T and diode D1, microphone Y one end connects potentiometer RP one end, and the potentiometer RP other end connects the microphone Y other end respectively, electric capacity C1, resistance R2, resistance R4, electric capacity C3, resistance R6, resistance R8, electric capacity C5, resistance R10, resistance R12, electric capacity C8, transformer T coil L2, electric capacity C10 and diode D2 positive pole ground connection, potentiometer RP slide plate connects the electric capacity C1 other end and electric capacity C2 respectively, and the electric capacity C2 other end is contact resistance R1 respectively, resistance R2, resistance R11 and triode VT1 base stage, the resistance R11 other end connects electric capacity C7, the electric capacity C7 other end is connection transformer T coil L1 and triode VT3 collector electrode respectively, and triode VT3 emitter is the contact resistance R12 other end and the electric capacity C8 other end respectively, and triode VT3 base stage is contact resistance R9 respectively, electric capacity C6 and the resistance R10 other end, the electric capacity C6 other end is connecting triode VT2 collector electrode and resistance R7, the triode VT2 emitter contact resistance R8 other end and the electric capacity C5 other end respectively respectively, and triode VT2 base stage is contact resistance R5 respectively, electric capacity C4 and the resistance R6 other end, the electric capacity C4 other end is contact resistance R3 and triode VT1 collector electrode respectively, and triode VT1 emitter is the contact resistance R4 other end and the electric capacity C3 other end respectively, and the resistance R1 other end is the contact resistance R3 other end respectively, the resistance R5 other end, the resistance R7 other end, the resistance R9 other end, the transformer T coil L1 other end and power supply VCC, the transformer T coil L2 other end connects the electric capacity C10 other end and diode D1 positive pole respectively, and diode D1 negative pole connects magnetic recording head and diode D2 negative pole respectively.
Power supply VCC voltage is 3V.
Diode D2 is voltage stabilizing didoe.
Operation principle of the present utility model is: refer to Fig. 1, microphone Y-signal is added to transistor VT1 after potentiometer RP adjusts, it is a common-emitter amplifier, be connected on the electronic component of the emitter of VT1 all as Current Negative Three-Point Capacitance resistor, for stable DC working point, C3 is decoupling capacitor, VT1 ac gain is improved, audio signal is added on transformer T coil L1 after VT1 ~ VT3 tri-grades amplifies, through transformer T coupling, audio signal is delivered to magnetic recording head to record, L2 is in parallel with electric capacity C10 for transformer T coil, in order to promote high-frequency signal, make up the high-frequency loss in Recording Process, the peak voltage clamper that transformer T coil can produce because of leakage inductance by diode D1 and D2 is to safety value, promote circuit stability, the collector electrode output feedack of VT3 is to the base stage of VT1, and for improving the frequency characteristic of amplifier, the output of this amplifier adopts the mode of transformer T transformation to compensate high-frequency signal, and circuit, by 3V low-voltage power supply, has the feature of little power consumption.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (3)
1. a sound program recording signal amplifier, comprises microphone Y, potentiometer RP, electric capacity C1, resistance R1, triode VT1, transformer T and diode D1, is characterized in that, described microphone Y one end connects potentiometer RP one end, and the potentiometer RP other end connects the microphone Y other end respectively, electric capacity C1, resistance R2, resistance R4, electric capacity C3, resistance R6, resistance R8, electric capacity C5, resistance R10, resistance R12, electric capacity C8, transformer T coil L2, electric capacity C10 and diode D2 positive pole ground connection, described potentiometer RP slide plate connects the electric capacity C1 other end and electric capacity C2 respectively, and the electric capacity C2 other end is contact resistance R1 respectively, resistance R2, resistance R11 and triode VT1 base stage, the resistance R11 other end connects electric capacity C7, the electric capacity C7 other end is connection transformer T coil L1 and triode VT3 collector electrode respectively, and triode VT3 emitter is the contact resistance R12 other end and the electric capacity C8 other end respectively, and triode VT3 base stage is contact resistance R9 respectively, electric capacity C6 and the resistance R10 other end, the electric capacity C6 other end is connecting triode VT2 collector electrode and resistance R7, the triode VT2 emitter contact resistance R8 other end and the electric capacity C5 other end respectively respectively, and triode VT2 base stage is contact resistance R5 respectively, electric capacity C4 and the resistance R6 other end, the electric capacity C4 other end is contact resistance R3 and triode VT1 collector electrode respectively, and triode VT1 emitter is the contact resistance R4 other end and the electric capacity C3 other end respectively, and the described resistance R1 other end is the contact resistance R3 other end respectively, the resistance R5 other end, the resistance R7 other end, the resistance R9 other end, the transformer T coil L1 other end and power supply VCC, the transformer T coil L2 other end connects the electric capacity C10 other end and diode D1 positive pole respectively, and diode D1 negative pole connects magnetic recording head and diode D2 negative pole respectively.
2. sound program recording signal amplifier according to claim 1, is characterized in that, described power supply VCC voltage is 3V.
3. sound program recording signal amplifier according to claim 1, is characterized in that, described diode D2 is voltage stabilizing didoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520562257.6U CN204795596U (en) | 2015-07-30 | 2015-07-30 | Broadcasting recording signal amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520562257.6U CN204795596U (en) | 2015-07-30 | 2015-07-30 | Broadcasting recording signal amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204795596U true CN204795596U (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520562257.6U Expired - Fee Related CN204795596U (en) | 2015-07-30 | 2015-07-30 | Broadcasting recording signal amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204795596U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792316A (en) * | 2017-01-10 | 2017-05-31 | 南京航空航天大学 | A kind of industrial active noise reduction earmuff |
| CN107623651A (en) * | 2017-06-30 | 2018-01-23 | 中国建筑第七工程局有限公司 | A kind of intelligence community |
-
2015
- 2015-07-30 CN CN201520562257.6U patent/CN204795596U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792316A (en) * | 2017-01-10 | 2017-05-31 | 南京航空航天大学 | A kind of industrial active noise reduction earmuff |
| CN107623651A (en) * | 2017-06-30 | 2018-01-23 | 中国建筑第七工程局有限公司 | A kind of intelligence community |
| CN107623651B (en) * | 2017-06-30 | 2018-08-03 | 中国建筑第七工程局有限公司 | A kind of intelligence community |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20160730 |