JPS5521668A - Tone detection system - Google Patents
Tone detection systemInfo
- Publication number
- JPS5521668A JPS5521668A JP9509078A JP9509078A JPS5521668A JP S5521668 A JPS5521668 A JP S5521668A JP 9509078 A JP9509078 A JP 9509078A JP 9509078 A JP9509078 A JP 9509078A JP S5521668 A JPS5521668 A JP S5521668A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- fed
- counter
- gate
- 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
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
PURPOSE: To simplify the circuit and to make easy for circuit integration, by ensuring to detect the incoming of a given tone signal with a simple digital processing.
CONSTITUTION: The tone signal outputted from the reception circuit 1 is wave- shaped at the wave shape circuit 2 into output, the rectangular wave output wave- shaped is fed to the waveform processing circuit 3 to produce the timing pulse of leading of the rectangular waves. The timing pulse produced at the circuit 3 is fed to the counter circuit 4 consisting of the first and second delay circuits 7, 8, OR gates 9, 10, FF11 and the counter 12, and the counter 12 is controlled with the clock signal from the reference clock generating circuit 5 fed to the counter 12 and the gate activation signal to detect the specified tone signal is outputted. This gate activating signal is fed to the detected gate circuit 6 inputting the output pulse of the circuit 3 to output the specified tone signal to the output of the gate circuit 6.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9509078A JPS5521668A (en) | 1978-08-04 | 1978-08-04 | Tone detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9509078A JPS5521668A (en) | 1978-08-04 | 1978-08-04 | Tone detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5521668A true JPS5521668A (en) | 1980-02-15 |
Family
ID=14128210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9509078A Pending JPS5521668A (en) | 1978-08-04 | 1978-08-04 | Tone detection system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5521668A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58132431A (en) * | 1982-01-27 | 1983-08-06 | Tsugami Corp | Double-shaft indexing apparatus of machine tool |
| US4888828A (en) * | 1987-10-26 | 1989-12-26 | Mont-Bell Co., Ltd. | Sleeping bag device |
| JPH0356244U (en) * | 1990-06-20 | 1991-05-30 |
-
1978
- 1978-08-04 JP JP9509078A patent/JPS5521668A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58132431A (en) * | 1982-01-27 | 1983-08-06 | Tsugami Corp | Double-shaft indexing apparatus of machine tool |
| JPS6153183B2 (en) * | 1982-01-27 | 1986-11-17 | Tsugami Kk | |
| US4888828A (en) * | 1987-10-26 | 1989-12-26 | Mont-Bell Co., Ltd. | Sleeping bag device |
| JPH0356244U (en) * | 1990-06-20 | 1991-05-30 |
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