JPS5787243A - Signal detecting circuit - Google Patents
Signal detecting circuitInfo
- Publication number
- JPS5787243A JPS5787243A JP16214880A JP16214880A JPS5787243A JP S5787243 A JPS5787243 A JP S5787243A JP 16214880 A JP16214880 A JP 16214880A JP 16214880 A JP16214880 A JP 16214880A JP S5787243 A JPS5787243 A JP S5787243A
- Authority
- JP
- Japan
- Prior art keywords
- envelope
- signal
- output
- circuit
- response speed
- 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)
- Noise Elimination (AREA)
Abstract
PURPOSE:To improve S/N of a detected signal envelope, by using integrating circuits different in response speed and a circuit, which operates their output difference, for detection of the envelope of a signal having a specific frequency generated nonsteadily. CONSTITUTION:When the speed of the variance of the signal level envelope is higher than that of the noise level envelope, an integrating circuit 3 of a low response speed and an integrating circuit 4 of a high response speed are connected to the output of a band pass filter 1, and the difference between them is operated by a circuit 5 which operates the differential output between two integrating circuits 3 and 4, and the noise level variation included in the output of the band pass filter 1 is eliminated, and only the signal level variation appears. Consequently, the signal detection of a high S/N is possible.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16214880A JPS5787243A (en) | 1980-11-18 | 1980-11-18 | Signal detecting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16214880A JPS5787243A (en) | 1980-11-18 | 1980-11-18 | Signal detecting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5787243A true JPS5787243A (en) | 1982-05-31 |
Family
ID=15748944
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16214880A Pending JPS5787243A (en) | 1980-11-18 | 1980-11-18 | Signal detecting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5787243A (en) |
-
1980
- 1980-11-18 JP JP16214880A patent/JPS5787243A/en active Pending
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