CN105323675B - A kind of signal generator - Google Patents
A kind of signal generator Download PDFInfo
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- CN105323675B CN105323675B CN201410239168.8A CN201410239168A CN105323675B CN 105323675 B CN105323675 B CN 105323675B CN 201410239168 A CN201410239168 A CN 201410239168A CN 105323675 B CN105323675 B CN 105323675B
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- signal
- circuit
- selecting switch
- output terminal
- terminal connection
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Abstract
The present invention relates to physical experiment apparatus technical fields, specially a kind of signal generator, it can realize electroacoustic, conversion between acoustic-electric, be conducive to increase the intuitive auditory perception to different frequency signals, waveform is converted sound into be observed, improve experiment effect, it includes local signal circuit and signal output port, it is characterized in that, it further includes FM amplitude modulation circuit, outer signal tuning circuit, signal selecting switch, the input terminal of the output terminal connection FM amplitude modulation circuit of local signal circuit, one movable contact of the output terminal connection signal selecting switch of FM amplitude modulation circuit, the input terminal connection microphone input ports of outer signal tuning circuit, another movable contact of output terminal connection signal selecting switch, the fixed contact connection signal output port of signal selecting switch, loudspeaker, digital frequency meter.
Description
Technical field
The present invention relates to physical experiment apparatus technical field, specially a kind of signal generator.
Background technology
Oscillograph is often used in Physical Experiment, when using oscillograph, needs to export telecommunications with function signal instrument
It number is observed to oscillograph.General bashertron can only generate the electric signal of various frequencies, without electro-acoustic, sound-electric conversion work(
Can, when the electric signal of output is in the range of human auditory system, experimenter can not hear its corresponding sound, therefore lack to signal
Direct feel, meanwhile, voice signal can not be also converted into input oscillograph after electric signal and observed by bashertron.
Invention content
To solve the above-mentioned problems, the present invention provides a kind of signal generator, can realize electro-acoustic, it is sound-electric between
Conversion, be conducive to increase the intuitive auditory perception to different frequency signals, convert sound into waveform and observed, improved
Experiment effect.
Its technical solution is such：A kind of signal generator, including local signal circuit and signal output port,
It is characterized in that, further includes FM amplitude modulation circuit, outer signal tuning circuit, signal selecting switch, the local signal circuit
Output terminal connection FM amplitude modulation circuit input terminal, the output terminal of the FM amplitude modulation circuit connects the signal selecting switch
A movable contact, input terminal connection microphone input ports, the output terminal of the outer signal tuning circuit connect the letter
Another movable contact of number selecting switch, the fixed contact of the signal selecting switch connect the signal output port, loudspeaker, number
Word frequency meter.
It is further characterized by the signal selecting switch is single-pole double-throw switch (SPDT)；
Horn switch is set between the fixed contact of the signal selecting switch and the loudspeaker.
After adopting the structure of the invention, when signal selecting switch gets to the output terminal side of FM amplitude modulation circuit, the machine letter
The signal that number circuit generates is realized by FM amplitude modulation circuit and is made a sound by loudspeaker after electro-acoustic conversion, works as signal selecting switch
The output terminal side of outer signal tuning circuit is got to, the voice signal of microphone input ports input is tuned by outer signal
By signal output port output signal after the sound-electric conversion of circuit realization, pass through oscillograph and carry out waveform observation, digital frequency meter is used
To show the frequency of output signal, this signal generator can realize electro-acoustic, it is sound-electric between conversion, be conducive to increase to not
The intuitive auditory perception of same frequency signal, converts sound into waveform and is observed, improve experiment effect.
Description of the drawings
Fig. 1 is the schematic circuit of the present invention；
Fig. 2 is the control panel schematic diagram of the present invention.
Specific embodiment
See Fig. 1, a kind of signal generator including local signal circuit 1 and signal output port 4, further includes frequency modulation
Modulation circuit 2, outer signal tuning circuit 6, signal selecting switch 7, the output terminal connection FM amplitude modulation electricity of local signal circuit 1
The input terminal on road 2, a movable contact of the output terminal connection signal selecting switch 7 of FM amplitude modulation circuit 2, outer signal tuning electricity
The input terminal connection microphone input ports 5 on road 6, another movable contact of output terminal connection signal selecting switch 7, signal behavior
Fixed contact connection signal output port 4, loudspeaker 8, the digital frequency meter 3 of switch 7；Signal selecting switch 7 is single-pole double-throw switch (SPDT)；
Horn switch 9 between the fixed contact of signal selecting switch 7 and loudspeaker 8 is set, can control whether to export by horn switch 9
Sound.
As shown in Fig. 2, on control panel, frequency adjusting knob 21, amplitude adjusted knob 22 act on FM amplitude modulation in Fig. 1
Circuit 2 acts on to adjust the signal frequency of the output of local signal circuit 1 and voltage amplitude, outer signal tuning knob 51
External signal tuning circuit 6 in Fig. 1, to adjust the gain size of the signal of the output of local signal circuit 1, signal output port
4 to connect oscillograph, and waveform is observed by oscillograph, and microphone input ports 5 are to connect microphone, convenient for inputting sound
Signal, digital frequency meter 3 show output signal frequency, signal selecting switch 7 to select local signal or outer signal,
Loudspeaker 8 are used for the sound of play signal, and horn switch 9 is used to be turned on and off loudspeaker 8.
Claims (1)
1. a kind of signal generator, including local signal circuit and signal output port, which is characterized in that it further includes frequency modulation
Modulation circuit, outer signal tuning circuit, signal selecting switch, the output terminal connection FM amplitude modulation electricity of the local signal circuit
The input terminal on road, the output terminal of the FM amplitude modulation circuit connects a movable contact of the signal selecting switch, described external
Input terminal connection microphone input ports, the output terminal of signal tuning circuit connect the signal selecting switch another dynamic touch
Point, the fixed contact of the signal selecting switch connect the signal output port, loudspeaker, digital frequency meter, the signal behavior
It switchs as single-pole double-throw switch (SPDT), horn switch is set between the fixed contact of the signal selecting switch and the loudspeaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410239168.8A CN105323675B (en) | 2014-06-03 | 2014-06-03 | A kind of signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410239168.8A CN105323675B (en) | 2014-06-03 | 2014-06-03 | A kind of signal generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105323675A CN105323675A (en) | 2016-02-10 |
| CN105323675B true CN105323675B (en) | 2018-06-19 |
Family
ID=55250122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410239168.8A Active CN105323675B (en) | 2014-06-03 | 2014-06-03 | A kind of signal generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105323675B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2206949Y (en) * | 1994-09-21 | 1995-09-06 | 西安交通大学 | Multifunction sound wave parameter surveying instrument |
| CN1211155A (en) * | 1997-06-24 | 1999-03-17 | 松下电器产业株式会社 | Electro-mechanical-acoustic transducing device |
| CN2485911Y (en) * | 2001-06-12 | 2002-04-10 | 中华人民共和国厦门出入境检验检疫局 | Electric sound signal tester for computer acoustic card |
| JP2008082809A (en) * | 2006-09-27 | 2008-04-10 | Funai Electric Co Ltd | Electronic equipment |
| CN202513889U (en) * | 2012-04-13 | 2012-10-31 | 江南大学 | Dual-frequency signal generator |
| CN203929214U (en) * | 2014-06-03 | 2014-11-05 | 无锡科技职业学院 | A kind of acoustoelectric signal instrument |
-
2014
- 2014-06-03 CN CN201410239168.8A patent/CN105323675B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2206949Y (en) * | 1994-09-21 | 1995-09-06 | 西安交通大学 | Multifunction sound wave parameter surveying instrument |
| CN1211155A (en) * | 1997-06-24 | 1999-03-17 | 松下电器产业株式会社 | Electro-mechanical-acoustic transducing device |
| CN2485911Y (en) * | 2001-06-12 | 2002-04-10 | 中华人民共和国厦门出入境检验检疫局 | Electric sound signal tester for computer acoustic card |
| JP2008082809A (en) * | 2006-09-27 | 2008-04-10 | Funai Electric Co Ltd | Electronic equipment |
| CN202513889U (en) * | 2012-04-13 | 2012-10-31 | 江南大学 | Dual-frequency signal generator |
| CN203929214U (en) * | 2014-06-03 | 2014-11-05 | 无锡科技职业学院 | A kind of acoustoelectric signal instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105323675A (en) | 2016-02-10 |
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