JPS5578289A - Electronic time knocking circuit - Google Patents
Electronic time knocking circuitInfo
- Publication number
- JPS5578289A JPS5578289A JP15246278A JP15246278A JPS5578289A JP S5578289 A JPS5578289 A JP S5578289A JP 15246278 A JP15246278 A JP 15246278A JP 15246278 A JP15246278 A JP 15246278A JP S5578289 A JPS5578289 A JP S5578289A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- audio
- tone
- inputted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Electric Clocks (AREA)
Abstract
PURPOSE: To correct the dispersion in the sound tone of time knocking tone due to the frequency characteristic deviation of speakers at manufacture, by picking up only required components in the spectrum for the audio synthesis signal through the filter circuit.
CONSTITUTION: The audio signal in frequencies f1 and f2 is inputted to the NOR circuit NOR1 to be audio synthetis signal with synthesis. This signal is inputted to the transfer gate TG3 of the modulation circuit 16 via the filter circuit 23. The circuit 23 consists of the FET active circuit and the circuit time constant is set so that required components only are picked up among the spectrum of audio synthesis signal. On the other hand, the knock tone period pulse signal is inputted to the circuit 16 and attenuation signal to turn on and off the transfer gate TG2. This attenuation signal is integrated with the audio synthesis signal and knock tone signal is obtained when it is modulated with the carrier as the attenuation signal. This signal is amplified at the amplifying circuit 18 to drive the speaker 19 having the frequency performance including the selective spectrum being the output of the circuit 23.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15246278A JPS5578289A (en) | 1978-12-08 | 1978-12-08 | Electronic time knocking circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15246278A JPS5578289A (en) | 1978-12-08 | 1978-12-08 | Electronic time knocking circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5578289A true JPS5578289A (en) | 1980-06-12 |
Family
ID=15541034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15246278A Pending JPS5578289A (en) | 1978-12-08 | 1978-12-08 | Electronic time knocking circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5578289A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102290046A (en) * | 2011-07-15 | 2011-12-21 | 莱州市金声汽车电器有限公司 | Snail electric horn |
-
1978
- 1978-12-08 JP JP15246278A patent/JPS5578289A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102290046A (en) * | 2011-07-15 | 2011-12-21 | 莱州市金声汽车电器有限公司 | Snail electric horn |
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