JPS56143728A - Detecting circuit for out-band signal or noise - Google Patents
Detecting circuit for out-band signal or noiseInfo
- Publication number
- JPS56143728A JPS56143728A JP4711880A JP4711880A JPS56143728A JP S56143728 A JPS56143728 A JP S56143728A JP 4711880 A JP4711880 A JP 4711880A JP 4711880 A JP4711880 A JP 4711880A JP S56143728 A JPS56143728 A JP S56143728A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- filter
- circuits
- detecting circuit
- constitution
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Diaphragms For Cameras (AREA)
- Noise Elimination (AREA)
Abstract
PURPOSE:To detect precisely the existence of a frequency component outside of a specific band, by managing with only one filter when the filter requires complicate constitution, by constituting simply a detecting circuit by using one filter and a few peripheral circuits. CONSTITUTION:An input signal is led out from both the input terminal and output terminal of by-pass filter 1 and applied to rectifying circuits 2 and 3, respectively. Then, adding circuit 4 adds together outputs of circuits 2 and 3 to obtain voltages which are to cancel mutually. Integral network 5 extracts the mean DC voltage of the output voltage of circuit 4. The comparison potential of circuit 5 (discriminating circuit) is determined and if a signal containing out-band components exceeding some amount is inputted and surpasses the comparison potential, it can be detected by comparing circuit 6. Thus, the detecting circuit or discriminating circuit can be composed of one filter and simple peripheral circuits only.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4711880A JPS56143728A (en) | 1980-04-10 | 1980-04-10 | Detecting circuit for out-band signal or noise |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4711880A JPS56143728A (en) | 1980-04-10 | 1980-04-10 | Detecting circuit for out-band signal or noise |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56143728A true JPS56143728A (en) | 1981-11-09 |
Family
ID=12766242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4711880A Pending JPS56143728A (en) | 1980-04-10 | 1980-04-10 | Detecting circuit for out-band signal or noise |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56143728A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61154526U (en) * | 1985-03-18 | 1986-09-25 | ||
JP2006025273A (en) * | 2004-07-09 | 2006-01-26 | Hitachi Kokusai Denki Engineering:Kk | Noise squelch circuit |
JP2008058401A (en) * | 2006-08-29 | 2008-03-13 | Canon Inc | Controller and imaging apparatus |
JP2008058402A (en) * | 2006-08-29 | 2008-03-13 | Canon Inc | Control device and imaging apparatus |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5533335A (en) * | 1978-08-31 | 1980-03-08 | Fujitsu Ltd | Signaling signal detection system |
-
1980
- 1980-04-10 JP JP4711880A patent/JPS56143728A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5533335A (en) * | 1978-08-31 | 1980-03-08 | Fujitsu Ltd | Signaling signal detection system |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61154526U (en) * | 1985-03-18 | 1986-09-25 | ||
JP2006025273A (en) * | 2004-07-09 | 2006-01-26 | Hitachi Kokusai Denki Engineering:Kk | Noise squelch circuit |
JP4625278B2 (en) * | 2004-07-09 | 2011-02-02 | 株式会社五洋電子 | Noise squelch circuit |
JP2008058401A (en) * | 2006-08-29 | 2008-03-13 | Canon Inc | Controller and imaging apparatus |
JP2008058402A (en) * | 2006-08-29 | 2008-03-13 | Canon Inc | Control device and imaging apparatus |
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