CN202330554U - Signal generator capable of detecting frequency - Google Patents
Signal generator capable of detecting frequency Download PDFInfo
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- CN202330554U CN202330554U CN2011204673553U CN201120467355U CN202330554U CN 202330554 U CN202330554 U CN 202330554U CN 2011204673553 U CN2011204673553 U CN 2011204673553U CN 201120467355 U CN201120467355 U CN 201120467355U CN 202330554 U CN202330554 U CN 202330554U
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- electric capacity
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Abstract
The utility model discloses a signal generator capable of detecting a frequency, and the signal generator comprises a signal generation circuit and a frequency detection circuit, wherein the frequency detection circuit comprises a mixer circuit and a low-frequency amplification circuit; the mixer circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a third capacitor and a first triode; two ends of the first resistor are respectively connected with two ends of a signal to be detected; one end of the signal to be detected is connected with the base electrode of the first triode through the first capacitor; two ends of the second resistor, which are serially connected with the third capacitor, are respectively connected with the base electrode and collector electrode of the first triode; two ends of the third resistor, which are serially connected with the fourth resistor, are respectively connected with the base electrode and emitter electrode of the first triode; and the emitter electrode of the first triode is connected with the output end of the signal generation circuit through the second capacitor. The signal generator has the advantages of capability of detecting the frequency on the basis of the function of the traditional signal generator, strong functions, convenience for maintenance, and accuracy in frequency measurement.
Description
Technical field
The utility model relates to a kind of signal generator, more relates to a kind of signal generator that detects frequency.
Background technology
General signal generator is the signal that is used for exporting certain frequency, supplies to transfer to survey the maintenance radio and use, and signal generator can not be used for measured frequency, therefore in the process of maintenance, also will use the Frequency tester of specialty, increased burden to maintenance job.
Summary of the invention
But the purpose of the utility model just is to provide in order to address the above problem a kind of signal generator of easy to use, the more working frequency meter of function.
The utility model is realized above-mentioned purpose through following technical scheme:
The utility model comprises signal generating circuit and frequency detection circuit; The output terminal of said signal generating circuit is connected with the input end of frequency detection circuit; Said frequency detection circuit comprises mixting circuit and low-frequency amplifier circuit; Said mixting circuit comprises first resistance, second resistance, the 3rd resistance, the 4th resistance, first electric capacity, second electric capacity, the 3rd electric capacity and first triode; The two ends of said first resistance connect the two ends of measured signal respectively; One end of said measured signal is connected with the base stage of said first triode through said first electric capacity; Two ends after said second resistance and said the 3rd capacitances in series are connected the base stage and the collector of said first triode respectively, and the two ends after said the 3rd resistance and said the 4th resistance series connection are connected the base stage and the emitter of said first triode respectively, and the emitter of said first triode connects the output terminal of said signal generating circuit through second electric capacity.
The said mixting circuit of the utility model also comprises the 4th electric capacity, the 5th electric capacity, the 5th resistance, the 6th resistance and slide rheostat; Two ends after the series connection of said the 4th electric capacity and the 5th resistance are connected the two ends of the 3rd electric capacity respectively; The two ends of said the 4th electric capacity also are parallel with said the 6th resistance, and an end of said the 4th electric capacity is connected with the sliding end of said slide rheostat through said the 5th electric capacity.
The said low-frequency amplifier circuit of the utility model comprises second triode, the 3rd triode, the 6th electric capacity, the 7th resistance, the 8th resistance, the 9th resistance and the tenth resistance; The base stage of said second triode and emitter are connected the two ends of said slide rheostat respectively; The collector of said second triode is connected with the 6th electric capacity with the 7th resistance through the 8th resistance successively; The collector of said second triode also is connected with the base stage of said the 3rd triode; The two ends of said the 9th resistance connect the base stage of said second triode and the emitter of said the 3rd triode respectively; The two ends of said the 9th resistance connect the base stage of said second triode and the emitter of said the 3rd triode respectively, and the emitter of said the 3rd triode also is connected with the emitter of said second triode through the tenth resistance.
The said low-frequency amplifier circuit of the utility model also comprises transformer, the 7th electric capacity and the 8th electric capacity; The high pressure of said transformer is surveyed two ends and is connected the collector of said the 3rd triode and an end of said the 8th resistance respectively; The emitter that the low-pressure side two ends of said transformer connect said the 3rd triode in loudspeaker two ends respectively is connected through the end that the 7th electric capacity and the 8th electric capacity and voltage device high pressure are surveyed successively, and the two ends of said the 7th electric capacity are also parallelly connected with said the tenth resistance.
The beneficial effect of the utility model is:
The utility model can also detect frequency on the basis with signal generator function, simple to operate, and is powerful, bring convenience to maintenance job, and frequency-measurement accuracy is accurate.
Description of drawings
Accompanying drawing is the circuit structure schematic diagram of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Shown in accompanying drawing: the utility model comprises signal generating circuit and frequency detection circuit; The output terminal of said signal generating circuit is connected with the input end of frequency detection circuit; Said frequency detection circuit comprises mixting circuit and low-frequency amplifier circuit; Said mixting circuit comprises first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3 and the first triode BG1; The two ends of first resistance R 1 connect the two ends of measured signal respectively; One end of said measured signal is connected with the base stage of the first triode BG1 through first capacitor C 1; Two ends after second resistance R 2 and the series connection of the 3rd capacitor C 3 are connected base stage and the collector of the first triode BG1 respectively, and the two ends after the 3rd resistance R 3 and 4 series connection of the 4th resistance R are connected base stage and the emitter of the first triode BG1 respectively, and the emitter of the first triode BG1 is through the output terminal of the said signal generating circuit of second capacitor C, 2 connections.
Shown in accompanying drawing: the said mixting circuit of the utility model also comprises the 4th capacitor C 4, the 5th capacitor C 5, the 5th resistance R 5, the 6th resistance R 6 and slide rheostat W; Two ends after the 4th capacitor C 4 and the series connection of the 5th resistance R 5 are connected the two ends of the 3rd capacitor C 3 respectively; The end that the two ends of the 4th capacitor C 4 also are parallel with the 6th resistance R 6, the four capacitor C 4 is connected with the sliding end of slide rheostat W through the 5th capacitor C 5.
Shown in accompanying drawing: the said low-frequency amplifier circuit of the utility model comprises the second triode BG2, the 3rd triode BG3, the 6th capacitor C 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9 and the tenth resistance R 10; The base stage of the second triode BG2 and emitter are connected the two ends of slide rheostat W respectively; The collector of the second triode BG2 is connected with the 6th capacitor C 6 with the 7th resistance R 7 through the 8th resistance R 8 successively; The collector of the second triode BG2 also is connected with the base stage of the 3rd triode BG3; The two ends of the 9th resistance R 9 connect the base stage of the second triode BG2 and the emitter of the 3rd triode BG3 respectively; The two ends of the 9th resistance R 9 connect the base stage of the second triode BG2 and the emitter of the 3rd triode BG3 respectively, and the emitter of the 3rd triode BG3 also is connected with the emitter of the second triode BG2 through the tenth resistance R 10.
Shown in accompanying drawing: the said low-frequency amplifier circuit of the utility model also comprises transformer B, the 7th capacitor C 7 and the 8th capacitor C 8; The high pressure of transformer B is surveyed two ends and is connected the collector of the 3rd triode BG3 and an end of the 8th resistance R 8 respectively; The emitter that the low-pressure side two ends of transformer B connect loudspeaker two ends the 3rd triode BG3 respectively is connected with the end that the 8th capacitor C 8 and transformer B high pressure are surveyed through the 7th electric capacity R7 successively, and the two ends of the 7th electric capacity R7 are also parallelly connected with the tenth resistance R 10.
Shown in accompanying drawing: the utility model is made up of mixting circuit and low-frequency amplifier circuit two parts, the mixting circuit that the first triode BG1 etc. form, and purpose is signal and the measured signal mixing with signal generator output, and takes out their difference frequency signal.This circuit is to utilize non-linear between base stage and the emitter of triode to accomplish mixing; Measured signal is added to the base stage of the first triode BG1; The signal of signal generator output is added to the emitter of the first triode BG1, and the signal after the mixing is then exported by collector.The 3rd capacitor C 3, the 5th resistance R 5 and the 4th capacitor C 4 are formed high frequency filters, with two signals of former input and they with the elimination of frequency composition, remaining difference frequency signal is sent into low-frequency amplifier through the 5th capacitor C 5 and is amplified.In order to be fit to various frequency measurement needs, be provided with two input ends in the base stage of the first triode BG1; " 1 " is the high impedance input end, and " 2 " are the Low ESR input ends.The second triode BG2 and the 3rd triode BG3 form a directly coupling low-frequency amplifier.Transformer is with the output transformer of transistor radio.
The utility model in use, the output signal frequency of signal generator and measured signal frequency near the time, the sound in the loudspeaker also will be by sharp chap, minimum up to sound, at this moment the numeral of indication is exactly the frequency of measured signal on the Frequency Of Signal Generator scale.
Claims (4)
1. signal generator that can detect frequency; Comprise signal generating circuit; It is characterized in that: also comprise frequency detection circuit; The output terminal of said signal generating circuit is connected with the input end of frequency detection circuit; Said frequency detection circuit comprises mixting circuit and low-frequency amplifier circuit, and said mixting circuit comprises first resistance, second resistance, the 3rd resistance, the 4th resistance, first electric capacity, second electric capacity, the 3rd electric capacity and first triode, and the two ends of said first resistance connect the two ends of measured signal respectively; One end of said measured signal is connected with the base stage of said first triode through said first electric capacity; Two ends after said second resistance and said the 3rd capacitances in series are connected the base stage and the collector of said first triode respectively, and the two ends after said the 3rd resistance and said the 4th resistance series connection are connected the base stage and the emitter of said first triode respectively, and the emitter of said first triode connects the output terminal of said signal generating circuit through second electric capacity.
2. the signal generator that detects frequency according to claim 1; It is characterized in that: said mixting circuit also comprises the 4th electric capacity, the 5th electric capacity, the 5th resistance, the 6th resistance and slide rheostat; Two ends after the series connection of said the 4th electric capacity and the 5th resistance are connected the two ends of the 3rd electric capacity respectively; The two ends of said the 4th electric capacity also are parallel with said the 6th resistance, and an end of said the 4th electric capacity is connected with the sliding end of said slide rheostat through said the 5th electric capacity.
3. the signal generator that detects frequency according to claim 1; It is characterized in that: said low-frequency amplifier circuit comprises second triode, the 3rd triode, the 6th electric capacity, the 7th resistance, the 8th resistance, the 9th resistance and the tenth resistance; The base stage of said second triode and emitter are connected the two ends of said slide rheostat respectively; The collector of said second triode is connected with the 6th electric capacity with the 7th resistance through the 8th resistance successively; The collector of said second triode also is connected with the base stage of said the 3rd triode; The two ends of said the 9th resistance connect the base stage of said second triode and the emitter of said the 3rd triode respectively; The two ends of said the 9th resistance connect the base stage of said second triode and the emitter of said the 3rd triode respectively, and the emitter of said the 3rd triode also is connected with the emitter of said second triode through the tenth resistance.
4. the signal generator that detects frequency according to claim 3; It is characterized in that: said low-frequency amplifier circuit also comprises transformer, the 7th electric capacity and the 8th electric capacity; The high pressure of said transformer is surveyed two ends and is connected the collector of said the 3rd triode and an end of said the 8th resistance respectively; The emitter that the low-pressure side two ends of said transformer connect said the 3rd triode in loudspeaker two ends respectively is connected through the end that the 7th electric capacity and the 8th electric capacity and voltage device high pressure are surveyed successively, and the two ends of said the 7th electric capacity are also parallelly connected with said the tenth resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204673553U CN202330554U (en) | 2011-11-23 | 2011-11-23 | Signal generator capable of detecting frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204673553U CN202330554U (en) | 2011-11-23 | 2011-11-23 | Signal generator capable of detecting frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202330554U true CN202330554U (en) | 2012-07-11 |
Family
ID=46442530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204673553U Expired - Fee Related CN202330554U (en) | 2011-11-23 | 2011-11-23 | Signal generator capable of detecting frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202330554U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535871A (en) * | 2015-01-12 | 2015-04-22 | 王志 | Signal tracing generator |
-
2011
- 2011-11-23 CN CN2011204673553U patent/CN202330554U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535871A (en) * | 2015-01-12 | 2015-04-22 | 王志 | Signal tracing generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20121123 |