JPS6467044A - Synchronizing signal detection circuit - Google Patents

Synchronizing signal detection circuit

Info

Publication number
JPS6467044A
JPS6467044A JP62223372A JP22337287A JPS6467044A JP S6467044 A JPS6467044 A JP S6467044A JP 62223372 A JP62223372 A JP 62223372A JP 22337287 A JP22337287 A JP 22337287A JP S6467044 A JPS6467044 A JP S6467044A
Authority
JP
Japan
Prior art keywords
signal
state
synchronizing signal
noise
under
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
Application number
JP62223372A
Other languages
Japanese (ja)
Inventor
Mitsuaki Nishie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP62223372A priority Critical patent/JPS6467044A/en
Publication of JPS6467044A publication Critical patent/JPS6467044A/en
Pending legal-status Critical Current

Links

Landscapes

  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To enable a synchronizing signal to be obtained by a simple constitution under the state that the signal is not transmitted by obtaining the synchronizing signal based on a noise signal from a noise signal output means under the state that the signal is not transmitted. CONSTITUTION:Under the state that a receiving signal does not exist, only the noise signal is supplied to an AGC amplifier 2 from the noise output circuit 5. Then, as the AGC amplifier 2 is changed to a high gain state under that state, the noise signal is amplified and supplied to a narrow-band filter 3. As a signal of which frequency is nearly the same as that of the synchronizing signal is contained in the noise signal, the signal of which frequency is neraly the same as that of the synchronizing signal is outputted by the narrow-band filter 3. This signal is converted to a digital signal by a comparator 4 and used as the synchronizing signal in a receiving device. Thus the signal corresponding to the synchronizing signal can be obtained under the state that the receiving signal does not exist.
JP62223372A 1987-09-07 1987-09-07 Synchronizing signal detection circuit Pending JPS6467044A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62223372A JPS6467044A (en) 1987-09-07 1987-09-07 Synchronizing signal detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62223372A JPS6467044A (en) 1987-09-07 1987-09-07 Synchronizing signal detection circuit

Publications (1)

Publication Number Publication Date
JPS6467044A true JPS6467044A (en) 1989-03-13

Family

ID=16797111

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62223372A Pending JPS6467044A (en) 1987-09-07 1987-09-07 Synchronizing signal detection circuit

Country Status (1)

Country Link
JP (1) JPS6467044A (en)

Similar Documents

Publication Publication Date Title
JPS5558681A (en) Time base error correcting circuit of video signal
IL133965A (en) Wake-up circuit for an electronic apparatus
JPS6467044A (en) Synchronizing signal detection circuit
JPS6473831A (en) Bidirectional catv system
JPS5585228A (en) Musical sound analyzer
JPS56146381A (en) Television voice receiving device
FR2403702A1 (en) TV receiver circuit with tuner AGC - has comparator for comparing detected video output signal with reference signal to provide AGC signal
JPS54153676A (en) Partial discharge measuring apparatus
JPS5592081A (en) Adjustment unit of television receiver
JPS5440016A (en) Fail soft receiving high frequency amplifier
JPS5470719A (en) Binary coding circuit
JPS558657A (en) Signal delay circuit
JPS5768977A (en) Audio receiving circuit for television
JPS57164605A (en) Amplifier
JPS53118926A (en) Aft circuit
EP0600091A4 (en) Digital signal receiver.
JPS5784690A (en) Automatic gain control circuit in video signal transmission system
JPS5758475A (en) Sound if circuit for television receiver
EP0388552A3 (en) Receiver
JPS5564409A (en) Agc circuit of receiver
JPS551736A (en) Frequency discriminator
JPS6473227A (en) Light quantity detecting device
JPS6473228A (en) Light quantity detecting device
JPS5564444A (en) Radio communication device
JPS5488717A (en) Synchronous separation circuit