CN204214908U - 300kHz sine wave high-frequency signal generator - Google Patents
300kHz sine wave high-frequency signal generator Download PDFInfo
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- CN204214908U CN204214908U CN201420665079.5U CN201420665079U CN204214908U CN 204214908 U CN204214908 U CN 204214908U CN 201420665079 U CN201420665079 U CN 201420665079U CN 204214908 U CN204214908 U CN 204214908U
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Abstract
The utility model is that its feature comprises about a kind of 300kHz sine wave high-frequency signal generator: described Voltage Controlled LC Oscillator is made up of high-frequency transformer T1 winding L 1, NPN type triode VT1, resistance R1, resistance R3, electrochemical capacitor C1, resistance R2 and voltage stabilizing diode DW; Reverse-biased and the resonant tank of described varactor is made up of high-frequency transformer T1 winding L 2, high-frequency transformer T1 winding L 3, high-frequency transformer T1 winding L 4, varactor D1, electric capacity C2, electric capacity C3, trimming capacitor C P, switching diode D2 and resistance R4, resistance R5; Described sine wave signal output port is that the two ends of high-frequency transformer T1 winding L 5 connect two lead-out terminals respectively.The utility model can export the sine wave signal of 300kHz, and its oscillation frequency can regulate, and the oscillation frequency stability of output signal is suitable with crystal oscillator, and it can meet general high speed circuit debugging needs.
Description
Technical field
The utility model belongs to circuit signal technical field of measurement and test, is about a kind of 300kHz sine wave high-frequency signal generator.
Background technology
The instrument of every generation test signal is referred to as signal source, also signal generator is referred to as, signal source can according to the difference of output waveform, be divided into the four large classes such as sine wave signal generator, rectangular pulse signal generator, function signal generator and random signal generator, wherein: sine wave signal is most popular test signal.
A kind of Amplitude Modulation High Frequency/FM signal instrumentation that high frequency signal generator can be tested the components and parts performance of the household electrical appliance such as radio, sound-track engraving apparatus, televisor and debug.Not only can the frequency band of test transistor amplifier, the intermediate-freuqncy signal in debugging radio frequency selection network, observes the high frequency characteristics of inductance, capacitor, also can in the whole radio of tracking, short-wave band frequency range.
At present, the signal generator that laboratory uses, they can only produce below 300kHz medium and low frequency sine wave, square wave and triangular wave, but its frequency and dutycycle is many can not regulate separately, very big inconvenience is brought to user, can not meet the needs of high speed circuit debugging, and it is quite expensive to buy a professional high frequency signal generator price.Therefore be necessary to develop that a kind of circuit structure is simple and direct, stable work in work, cheap, handy high frequency signal generator.
300kHz sine wave high-frequency signal generator described in the utility model can export 300kHz sine wave signal, its oscillation frequency can regulate, the oscillation frequency stability that signal exports is suitable with crystal oscillator, this design can meet general high speed circuit debugging needs, can be used as again the basic configuration of common laboratory.
Utility model content
Goal of the invention and beneficial effect: at present, the signal generator that laboratory uses, they can produce below 300kHz medium and low frequency sine wave, square wave and triangular wave, but its frequency and dutycycle is many can not regulate separately, very big inconvenience is brought to user, can not meet the needs of high speed circuit debugging, and it is quite expensive to buy a professional high frequency signal generator price.Therefore be necessary to develop that a kind of circuit structure is simple and direct, stable work in work, cheap, handy high frequency signal generator.300kHz sine wave high-frequency signal generator described in the utility model can export 300kHz sine wave signal, its oscillation frequency can regulate, the oscillation frequency stability that signal exports is suitable with crystal oscillator, this design can meet general high speed circuit debugging needs, can be used as again the basic configuration of common laboratory.
Circuit working principle: 300kHz sine wave high-frequency signal generator forms voltage controlled oscillator by NPN type triode VT1, high-frequency transformer T1, varactor D1 and related elements, voltage controlled oscillator adopts LC and transistor collector tuning manner.NPN type triode VT1 is oscillating tube, resonant tank is formed by winding L 2 ~ L4 inductance of varactor D1, electric capacity C2, electric capacity C3, trimming capacitor C P and high-frequency transformer T1, varactor D1 is reverse-biased work, the negative terminal of varactor D1 is added on, to change the electric capacity of varactor D1 from control voltage.Oscillator signal is by the winding L 5 sine wave output signal of high-frequency transformer T1.Wherein, trimming capacitor C P is used for oscillation frequency fine setting, and voltage stabilizing diode DW is used for the operating voltage of stable oscillation stationary vibration level, and burning voltage is set to 6.8V.
The amplitude > 1000mV of sound signal that frequency is 1kHz, sound signal can be obtained at the output terminal of audio signal generator.
Accompanying drawing explanation
Accompanying drawing 1 is the embodiment circuit working schematic diagram that the utility model provides a 300kHz sine wave high-frequency signal generator; The pore on winding L 2 ~ L4 side of accompanying drawing 1 medium/high frequency transformer T1 is Same Name of Ends.
Embodiment
According to the 300kHz sine wave high-frequency signal generator circuit fundamental diagram shown in accompanying drawing 1 and accompanying drawing explanation, and according to annexation between components and parts in each several part circuit described in utility model content, and components and parts technical parameter described in embodiment requires and circuit production main points are carried out enforcement and can be realized the utility model, is further described correlation technique of the present utility model below in conjunction with embodiment.
Technical characteristic: 300kHz sine wave high-frequency signal generator, it comprises 18V direct supply, Voltage Controlled LC Oscillator, varactor reverse-biased and resonant tank, sine wave signal output port, it is characterized in that:
Voltage Controlled LC Oscillator: it is by high-frequency transformer T1 winding L 1, NPN type triode VT1, resistance R1, resistance R3, electrochemical capacitor C1, resistance R2 and voltage stabilizing diode DW forms, base stage connecting resistance R3 one end of NPN type triode VT1 and the negative pole of electrochemical capacitor C1 and resistance R2 one end, the positive pole of another termination voltage stabilizing diode of resistance R2 DW, the positive pole of electrochemical capacitor C1 and the negative pole connection circuit positive pole GND of voltage stabilizing diode DW, the emitter of NPN type triode VT1 is by high-frequency transformer T1 winding L 1 and resistance R1 connection circuit negative pole VCC, the collector of NPN type triode VT1 connects the Same Name of Ends of high-frequency transformer T1 winding L 3,
Reverse-biased and the resonant tank of varactor: it is by high-frequency transformer T1 winding L 2, high-frequency transformer T1 winding L 3, high-frequency transformer T1 winding L 4, varactor D1, electric capacity C2, electric capacity C3, trimming capacitor C P, switching diode D2 and resistance R4, resistance R5 forms, the stator of high-frequency transformer T1 winding L 2 different name termination capacitor C2 one end and electric capacity C3 one end and trimming capacitor C P, the negative terminal of another termination varactor of electric capacity C2 D1, the positive termination circuit negative pole VCC of varactor D1, the termination capacitor C3 other end of the same name of high-frequency transformer T1 winding L 4 and the moving plate of trimming capacitor C P, the negative pole of the termination switching diode D2 of the same name of high-frequency transformer T1 winding L 2, positive pole connecting resistance R4 one end of switching diode D2 and resistance R5 one end, resistance R4 other end connection circuit negative pole VCC, resistance R5 other end connection circuit positive pole GND,
Sine wave signal output port: the two ends of high-frequency transformer T1 winding L 5 connect two lead-out terminals respectively;
The negative pole connection circuit negative pole VCC of 18V direct supply, the positive pole connection circuit positive pole GND of 18V direct supply.
The technical parameter of components and parts and selection requirement
VT1 is NPN type triode, and the model selected is 2SC9013, requires β >=150, also can select the NPN type triode such as penetrating current is little, the domestic model 3DG6C of working stability;
The model that voltage stabilizing diode DW selects is 2CWl4, and voltage stabilizing value is 6.8V; The model that varactor D1 selects is 2CC5; The model that switching diode D2 selects is 1N4148 or selects domestic model 2CK18;
Resistance all selects 1/8 metalfilmresistor, and the resistance of resistance R1 is 1.2K Ω, and the resistance of resistance R2 is 3.3K Ω, and the resistance of resistance R3 is 5.1K Ω, and the resistance of resistance R4 is 3.9K Ω, and the resistance of resistance R5 is 3K Ω;
The capacity of electrochemical capacitor C1 is the capacity of 4.7 μ F/50V, electric capacity C2 is 51PF/l00V, and the capacity of electric capacity C3 is 820PF/l00V, and the capacity of trimming capacitor C P is 5 ~ 20PF;
High-frequency transformer T1: use high frequency ferrite core, all windings all use ￠ 0.29mm enameled wire, and winding L 1 is flat around 7 circles, winding L 2 is flat around l8 circle, and winding L 3 is flat around 9 circles, and winding L 4 is flat around 27 circles, winding L 5 is flat around 6 circles, notes the mark of winding L 2 ~ L4 Same Name of Ends of high-frequency transformer T1.
DC is direct supply, and its DC voltage is 18V.
Circuit production main points and circuit debugging
Because the circuit structure of 300kHz sine wave high-frequency signal generator is fairly simple, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation to specifications in accompanying drawing 1 is welded, physical connection line and welding quality, through carefully checking correctly, can normally work as long as circuit of the present utility model carries out simple debugging;
If circuit can not normally starting of oscillation, can the two ends of high-frequency transformer T1 winding L 1 be exchanged;
When circuit debugging, the collector current of test NPN type triode VT1 near 6mA, if do not meet, can the suitably resistance of adjusting resistance R1 or the resistance of resistance R3.
It not the guardian technique making the utility model necessity as the outward appearance of circuit components layout of the present utility model, board design, utility model and size etc.; and do not affect normal making; they neither the claimed scope of the utility model technical characteristic, therefore illustrates no longer one by one in the description.
Claims (1)
1. a 300kHz sine wave high-frequency signal generator, it comprises 18V direct supply, Voltage Controlled LC Oscillator, varactor reverse-biased and resonant tank, sine wave signal output port, it is characterized in that:
Described Voltage Controlled LC Oscillator is by high-frequency transformer T1 winding L 1, NPN type triode VT1, resistance R1, resistance R3, electrochemical capacitor C1, resistance R2 and voltage stabilizing diode DW forms, base stage connecting resistance R3 one end of NPN type triode VT1 and the negative pole of electrochemical capacitor C1 and resistance R2 one end, the positive pole of another termination voltage stabilizing diode of resistance R2 DW, the positive pole of electrochemical capacitor C1 and the negative pole connection circuit positive pole GND of voltage stabilizing diode DW, the emitter of NPN type triode VT1 is by high-frequency transformer T1 winding L 1 and resistance R1 connection circuit negative pole VCC, the collector of NPN type triode VT1 connects the Same Name of Ends of high-frequency transformer T1 winding L 3,
Reverse-biased and the resonant tank of described varactor is by high-frequency transformer T1 winding L 2, high-frequency transformer T1 winding L 3, high-frequency transformer T1 winding L 4, varactor D1, electric capacity C2, electric capacity C3, trimming capacitor C P, switching diode D2 and resistance R4, resistance R5 forms, the stator of high-frequency transformer T1 winding L 2 different name termination capacitor C2 one end and electric capacity C3 one end and trimming capacitor C P, the negative terminal of another termination varactor of electric capacity C2 D1, the positive termination circuit negative pole VCC of varactor D1, the termination capacitor C3 other end of the same name of high-frequency transformer T1 winding L 4 and the moving plate of trimming capacitor C P, the negative pole of the termination switching diode D2 of the same name of high-frequency transformer T1 winding L 2, positive pole connecting resistance R4 one end of switching diode D2 and resistance R5 one end, resistance R4 other end connection circuit negative pole VCC, resistance R5 other end connection circuit positive pole GND,
Described sine wave signal output port is that the two ends of high-frequency transformer T1 winding L 5 connect two lead-out terminals respectively;
The negative pole connection circuit negative pole VCC of described 18V direct supply, the positive pole connection circuit positive pole GND of 18V direct supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420665079.5U CN204214908U (en) | 2014-11-07 | 2014-11-07 | 300kHz sine wave high-frequency signal generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420665079.5U CN204214908U (en) | 2014-11-07 | 2014-11-07 | 300kHz sine wave high-frequency signal generator |
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| Publication Number | Publication Date |
|---|---|
| CN204214908U true CN204214908U (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420665079.5U Expired - Fee Related CN204214908U (en) | 2014-11-07 | 2014-11-07 | 300kHz sine wave high-frequency signal generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485949A (en) * | 2014-11-07 | 2015-04-01 | 吴圣铎 | 300KHz sine wave high frequency signal generator |
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2014
- 2014-11-07 CN CN201420665079.5U patent/CN204214908U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485949A (en) * | 2014-11-07 | 2015-04-01 | 吴圣铎 | 300KHz sine wave high frequency signal generator |
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| 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 |
Granted publication date: 20150318 Termination date: 20151107 |
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| EXPY | Termination of patent right or utility model |