CN204481765U - A kind of low impedance power amplifying circuit - Google Patents
A kind of low impedance power amplifying circuit Download PDFInfo
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- CN204481765U CN204481765U CN201520098800.1U CN201520098800U CN204481765U CN 204481765 U CN204481765 U CN 204481765U CN 201520098800 U CN201520098800 U CN 201520098800U CN 204481765 U CN204481765 U CN 204481765U
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Abstract
The utility model relates to a kind of low impedance power amplifying circuit, comprise input, second transformer, field effect transistor, resonant circuit and output, the primary coil of described second transformer is connected with described input, the secondary coil of described second transformer and resistance R1 parallel with one another, resistance R3 and resistance R4 connects, the secondary coil of described second transformer is in parallel with resistance R2, the grid of described field effect transistor is connected with the secondary coil of described second transformer respectively with source electrode, described resonant circuit comprises the first transformer, first resonant inductance and the second resonant inductance, the drain electrode of described field effect transistor is connected with the primary coil of the first transformer, the secondary coil of described first transformer is in parallel with described first resonant inductance, the secondary coil of described first transformer is connected with output.The beneficial effects of the utility model are, the utility model provides a kind of stable output power and output power value low impedance power amplifying circuit accurately.
Description
Technical field
The utility model relates to a kind of low impedance power amplifying circuit.
Background technology
Due to blood contain a large amount of molecules of salt so impedance is very low general at about 5 Ω.General electric knife exports more than hectowatt and is difficult to accomplish under Low ESR like this.So just first require that high frequency power amplifier can export the power of more than 100W in low-impedance situation.Then continuous being adopted in the machine of getting back to by human body signal is calculated by CPU, then result of calculation is being fed back in power output.It is made to ensure, in the scope of 5 Ω, to export at more than 100W power.This process we be referred to as trunk closed-loop control system.
Utility model content
In view of the above-mentioned problems in the prior art, main purpose of the present utility model is to address the deficiencies of the prior art, and the utility model provides a kind of stable output power and output power value low impedance power amplifying circuit accurately.
The utility model provides a kind of low impedance power amplifying circuit, comprise input, second transformer T2, field effect transistor Q1, resonant circuit and output, the primary coil of described second transformer is connected with described input, the secondary coil of described second transformer and resistance R1 parallel with one another, resistance R3 and resistance R4 connects, the secondary coil of described second transformer T2 is in parallel with resistance R2, the grid of described field effect transistor is connected with the secondary coil of described second transformer T2 respectively with source electrode, described resonant circuit comprises the first transformer T1, first resonant inductance L1 and the second resonant inductance L2, the drain electrode of described field effect transistor Q1 is connected with the primary coil of the first transformer T1, the secondary coil of described first transformer T1 is in parallel with described first resonant inductance L1, the secondary coil of described first transformer T1 is connected with output, described second resonant inductance L2 connects with the secondary coil of described first transformer T1, also comprise electric capacity C1 in parallel with described first resonant inductance L1 respectively and electric capacity C2, electric capacity C3 parallel with one another is in series with between the secondary coil of described first transformer T1 and output, electric capacity C4 and electric capacity C5, electric capacity C6 parallel with one another and electric capacity C7 is also in series with between the secondary coil of described first transformer T1 and output, the secondary coil of described second transformer T2 is in series with two diodes.
Optionally, also comprise electric capacity C9 parallel with one another, electric capacity C10 and electric capacity C11, and described electric capacity C9, electric capacity C10 and electric capacity C11 parallel with one another are in parallel respectively with described two diodes.
The utility model has the following advantages and beneficial effect: the utility model provides a kind of low impedance power amplifying circuit, can when high frequency power at load 5 Ω export the power of 150W, so just need the coupling of output impedance, by the first transformer T1 and output power transformer that output is arranged, first resonant inductance L1 and the second resonant inductance L2, and described first transformer and output power transformer T1, first resonant inductance L1 and the second resonant inductance L2 constitutes string, resonant tank in parallel, adjust their inductance value, reach the coupling of power output, and then guarantee the high frequency power exporting 150W when 5 Ω load, stable output power and power output is accurate, improve operating efficiency.
Accompanying drawing explanation
The schematic diagram of a kind of low impedance power amplifying circuit that Fig. 1 provides for the utility model.
Embodiment
With specific embodiment, the utility model is further described below with reference to accompanying drawings.
As shown in Figure 1: a kind of low impedance power amplifying circuit of the utility model embodiment, comprise input, second transformer T2, field effect transistor Q1, resonant circuit 100 and output, the primary coil of described second transformer T2 is connected with described input, the secondary coil of described second transformer T2 and resistance R1 parallel with one another, resistance R3 and resistance R4 connects, the secondary coil of described second transformer T2 is in parallel with resistance R2, the grid of described field effect transistor Q1 is connected with the secondary coil of described second transformer T2 respectively with source electrode, described resonant circuit 100 comprises the first transformer T1, first resonant inductance L1 and the second resonant inductance L2, the drain electrode of described field effect transistor Q1 is connected with the primary coil of the first transformer T1, the secondary coil of described first transformer T1 is in parallel with described first resonant inductance L1, the secondary coil of described first transformer T1 is connected with output, described second resonant inductance L2 connects with the secondary coil of described first transformer T1, also comprise electric capacity C1 in parallel with described first resonant inductance L1 respectively and electric capacity C2, electric capacity C3 parallel with one another is in series with between the secondary coil of described first transformer T1 and output, electric capacity C4 and electric capacity C5, electric capacity C6 parallel with one another and electric capacity C7 is also in series with between the secondary coil of described first transformer T1 and output, the secondary coil of described second transformer T2 is in series with two diode D1, due to blood contain a large amount of molecules of salt so impedance is very low general at about 5 Ω, describedly require the power that high frequency power amplifier can export more than 100W in low-impedance situation, then continuous being adopted in the machine of getting back to by human body signal is calculated by CPU, again result of calculation is being fed back in power output, a kind of low impedance power amplifying circuit that the utility model provides, can when high frequency power at load 5 Ω export the power of 150W, so just need the coupling of output impedance, by the first transformer that output is arranged and output power transformer T1, first resonant inductance L1 and the second resonant inductance L2, and described first transformer T1 and output power transformer, first resonant inductance L1 and the second resonant inductance L2 constitutes string, resonant tank in parallel, adjust their inductance value, reach the coupling of power output, and then guarantee the high frequency power exporting 150W when 5 Ω load, stable output power and power output is accurate, improve operating efficiency.
As the preferred implementation of above-described embodiment, also comprise electric capacity C9 parallel with one another, electric capacity C10 and electric capacity C11, and described electric capacity C9, electric capacity C10 and electric capacity C11 parallel with one another are in parallel respectively with described two diodes.
Last it is noted that above-described each embodiment is only for illustration of the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in previous embodiment, or to wherein partly or entirely technical characteristic carry out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (2)
1. a low impedance power amplifying circuit, it is characterized in that: comprise input, second transformer T2, field effect transistor Q1, resonant circuit and output, the primary coil of described second transformer is connected with described input, the secondary coil of described second transformer and resistance R1 parallel with one another, resistance R3 and resistance R4 connects, the secondary coil of described second transformer T2 is in parallel with resistance R2, the grid of described field effect transistor is connected with the secondary coil of described second transformer T2 respectively with source electrode, described resonant circuit comprises the first transformer T1, first resonant inductance L1 and the second resonant inductance L2, the drain electrode of described field effect transistor Q1 is connected with the primary coil of the first transformer T1, the secondary coil of described first transformer T1 is in parallel with described first resonant inductance L1, the secondary coil of described first transformer T1 is connected with output, described second resonant inductance L2 connects with the secondary coil of described first transformer T1, also comprise electric capacity C1 in parallel with described first resonant inductance L1 respectively and electric capacity C2, electric capacity C3 parallel with one another is in series with between the secondary coil of described first transformer T1 and output, electric capacity C4 and electric capacity C5, electric capacity C6 parallel with one another and electric capacity C7 is also in series with between the secondary coil of described first transformer T1 and output, the secondary coil of described second transformer T2 is in series with two diodes.
2. low impedance power amplifying circuit according to claim 1, is characterized in that, also comprises electric capacity C9 parallel with one another, electric capacity C10 and electric capacity C11, and described electric capacity C9, electric capacity C10 and electric capacity C11 parallel with one another are in parallel respectively with described two diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520098800.1U CN204481765U (en) | 2015-02-11 | 2015-02-11 | A kind of low impedance power amplifying circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520098800.1U CN204481765U (en) | 2015-02-11 | 2015-02-11 | A kind of low impedance power amplifying circuit |
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| CN204481765U true CN204481765U (en) | 2015-07-15 |
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| CN201520098800.1U Active CN204481765U (en) | 2015-02-11 | 2015-02-11 | A kind of low impedance power amplifying circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900871A (en) * | 2020-07-22 | 2020-11-06 | 湖南华鑫晶造电气科技有限公司 | Switch hybrid resonance circuit and switch hybrid resonator |
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2015
- 2015-02-11 CN CN201520098800.1U patent/CN204481765U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900871A (en) * | 2020-07-22 | 2020-11-06 | 湖南华鑫晶造电气科技有限公司 | Switch hybrid resonance circuit and switch hybrid resonator |
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Addressee: BEIJING KANGWEI ELECTRONICS & TECHNOLOGY Co.,Ltd. Person in charge of patentsThe principal of patent Document name: payment instructions |
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