JPS54145411A - Frequency detection system - Google Patents
Frequency detection systemInfo
- Publication number
- JPS54145411A JPS54145411A JP5371778A JP5371778A JPS54145411A JP S54145411 A JPS54145411 A JP S54145411A JP 5371778 A JP5371778 A JP 5371778A JP 5371778 A JP5371778 A JP 5371778A JP S54145411 A JPS54145411 A JP S54145411A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- bpfs
- decoder
- response characteristics
- temperature
- 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)
- Facsimile Transmission Control (AREA)
Abstract
PURPOSE: To enable a system to operate stably even in case of variation in temperature and also to adjust a frequency with rapid response characteristics, by selecting an input signal, applied to a few BPFs different in frequency band, corresponding to a signal applied to a decoder.
CONSTITUTION: Several BPFs 1, having different frequency bands, are applied in common with a received input and their outputs are led to common amplifier 4 via individual switches 2 and then sent to retriggerable monostable multivibrator 6 via waveform shaping unit 5. Here, decoder 3 selects one of output terminals 0 to 7 corresponding to signals applied to input terminals A0 to A2 and E and closes the switch connecting to the selected switch. Consequently, the operation is stabilized against variation in temperature, and a frequency adjustment can be simplified with response characteristics quickened.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5371778A JPS54145411A (en) | 1978-05-08 | 1978-05-08 | Frequency detection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5371778A JPS54145411A (en) | 1978-05-08 | 1978-05-08 | Frequency detection system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54145411A true JPS54145411A (en) | 1979-11-13 |
Family
ID=12950573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5371778A Pending JPS54145411A (en) | 1978-05-08 | 1978-05-08 | Frequency detection system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54145411A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5175308A (en) * | 1974-12-26 | 1976-06-29 | Anritsu Electric Co Ltd | Tashuhajushinkino jibunkatsushutsuryokukairohoshiki |
-
1978
- 1978-05-08 JP JP5371778A patent/JPS54145411A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5175308A (en) * | 1974-12-26 | 1976-06-29 | Anritsu Electric Co Ltd | Tashuhajushinkino jibunkatsushutsuryokukairohoshiki |
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