JPS5486210A - Multi-frequency signal receiver - Google Patents
Multi-frequency signal receiverInfo
- Publication number
- JPS5486210A JPS5486210A JP15419277A JP15419277A JPS5486210A JP S5486210 A JPS5486210 A JP S5486210A JP 15419277 A JP15419277 A JP 15419277A JP 15419277 A JP15419277 A JP 15419277A JP S5486210 A JPS5486210 A JP S5486210A
- Authority
- JP
- Japan
- Prior art keywords
- bpf
- circuit
- signal
- agc
- delay time
- 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)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PURPOSE: To prevent error detection caused by the transient response voltage of a BPF by providing an analog gate circuit to the output of an AGC circuit for multi- frequency signal reception and by equipping a circuit which outputs a control signal allowing the gate to open after the operation delay time of the AGC.
CONSTITUTION: When a multi-frequency signal is applied to the AGC circuit, time response TIM applies a signal to gates of field effect transistors FET of analog gate circuits G1 to Gn after operation delay time (t) of the AGC circuit. As a result, FETs turn OFF, it is prevented that BPF1 to BPFn are applied with an excessive input within the operation delay time of the AGC circuit, and the transient response time becomes slight, so that it will not malfunction. Further, when a shortperiod signal such as a noise arrives, the signal attenuates before the gate circuit opens and, in cosequence, the shortperiod noise is not applied to BPF1 to BPFn, so that stable operation can be obtained.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15419277A JPS5486210A (en) | 1977-12-21 | 1977-12-21 | Multi-frequency signal receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15419277A JPS5486210A (en) | 1977-12-21 | 1977-12-21 | Multi-frequency signal receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5486210A true JPS5486210A (en) | 1979-07-09 |
Family
ID=15578839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15419277A Pending JPS5486210A (en) | 1977-12-21 | 1977-12-21 | Multi-frequency signal receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5486210A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5675754A (en) * | 1979-11-27 | 1981-06-23 | Hitachi Denshi Ltd | Synchronizing signal pickup system |
JPS6471292A (en) * | 1987-08-14 | 1989-03-16 | Mitel Corp | Dial tone detector |
-
1977
- 1977-12-21 JP JP15419277A patent/JPS5486210A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5675754A (en) * | 1979-11-27 | 1981-06-23 | Hitachi Denshi Ltd | Synchronizing signal pickup system |
JPS6471292A (en) * | 1987-08-14 | 1989-03-16 | Mitel Corp | Dial tone detector |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS53114651A (en) | Electronic circuit | |
JPS57109089A (en) | Initial value resetting circuit for operational amplifier | |
JPS5324766A (en) | Driving circuit for electronic device | |
JPS5711527A (en) | Chattering prevention circuit for electronic wrist watch | |
KR900002552A (en) | Output circuit | |
JPS5486210A (en) | Multi-frequency signal receiver | |
SE8301708L (en) | TEMPERATURE-INDEPENDENT, AMPLIFYING CONTROL CIRCUIT | |
JPS6446979A (en) | Analogue switch and sample-and-hold circuit with analogue switch | |
JPS5733493A (en) | Semiconductor storage device | |
JPS56112666A (en) | Semiconductor integrated circuit | |
SE8103279L (en) | SAMPLING AND HALLAR CIRCUITS WITH OFFSET ELIMINATION | |
JPS5315040A (en) | Automatic unit | |
JPS51111042A (en) | Gate circuit | |
JPS52117086A (en) | Semiconductor device for touch type switch | |
GB926420A (en) | Improvements in and relating to electrical pulse circuits | |
SE8001392L (en) | FORDROJNINGSKRETS | |
JPS5479676A (en) | Electronic wristwatch | |
JPS5384636A (en) | Sense amplifier circuit | |
JPS5624977A (en) | Semiconductor device | |
JPS51150955A (en) | Phase comparison circuit | |
JPS5434740A (en) | Automatic gain control circuit | |
JPS5651682A (en) | Unnecessary-reflected-wave eliminator of radar device | |
CA609125A (en) | Electronic signal delay circuits | |
JPS5258446A (en) | Flip frop circuit | |
JPS5420641A (en) | Automatic gain control circuit |