JPS6478006A - Fm demodulation circuit - Google Patents

Fm demodulation circuit

Info

Publication number
JPS6478006A
JPS6478006A JP62235149A JP23514987A JPS6478006A JP S6478006 A JPS6478006 A JP S6478006A JP 62235149 A JP62235149 A JP 62235149A JP 23514987 A JP23514987 A JP 23514987A JP S6478006 A JPS6478006 A JP S6478006A
Authority
JP
Japan
Prior art keywords
carrier frequency
modulation signal
phase
sideband wave
furthermore
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
JP62235149A
Other languages
Japanese (ja)
Inventor
Masahiro Honjo
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62235149A priority Critical patent/JPS6478006A/en
Publication of JPS6478006A publication Critical patent/JPS6478006A/en
Pending legal-status Critical Current

Links

Landscapes

  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To reduce deterioration in picture quality due to a moire component by displacing displacement relation between an FM carrier frequency and an FM sideband wave larger than that in an ordinary state, and applying distortion. CONSTITUTION:The frequency band area of an FM modulation signal with a carrier frequency fc is limited to 2fc by a low-pass filter 3, and the phase of the lower sideband wave of the FM modulation signal is delayed by a prescribed quantity for the carrier frequency fc by a phase displacement circuit 4, and furthermore, the phase of the upper sideband wave of the FM modulation signal is advanced by the prescribed quantity for the FM carrier frequency fc. In such a way, an unrequired component generated in a demodulator 5 is attenuated, and the moire component generated in a demodulation signal can be attenuated remarkably, thereby, the deterioration in the picture quality due to the moire component can be reduced, and furthermore, the FM carrier frequency fc can be set at a level lower than ever.
JP62235149A 1987-09-18 1987-09-18 Fm demodulation circuit Pending JPS6478006A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62235149A JPS6478006A (en) 1987-09-18 1987-09-18 Fm demodulation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62235149A JPS6478006A (en) 1987-09-18 1987-09-18 Fm demodulation circuit

Publications (1)

Publication Number Publication Date
JPS6478006A true JPS6478006A (en) 1989-03-23

Family

ID=16981778

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62235149A Pending JPS6478006A (en) 1987-09-18 1987-09-18 Fm demodulation circuit

Country Status (1)

Country Link
JP (1) JPS6478006A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5293245A (en) * 1991-05-15 1994-03-08 Victor Company Of Japan, Ltd. Video demodulation apparatus with moire component cancellation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5293245A (en) * 1991-05-15 1994-03-08 Victor Company Of Japan, Ltd. Video demodulation apparatus with moire component cancellation

Similar Documents

Publication Publication Date Title
US6324233B1 (en) Reception of modulated carriers having asymmetrical sidebands
US4600890A (en) Demodulator comprising a phase-locked loop
JPS6478006A (en) Fm demodulation circuit
IE791644L (en) Carrier regeneration
JPS6478005A (en) Fm demodulation circuit
JPS6478007A (en) Fm demodulation circuit
JPS6464480A (en) Emphasis/deemphasis circuit
JPS5514782A (en) Television picture receiver
JPS57105811A (en) Fm demodulation circuit
JPS53140926A (en) Television receiver
JPS5588483A (en) Signal transmission system for composite color television signal
JPS5570917A (en) Video quality correction unit for demodulated video signal
DE3475860D1 (en) Digital demodulation method and circuit for amplitude modulated signal and television receiver comprising such a circuit
JPS5731209A (en) Demodulator of fm signal
JPS6424609A (en) Fm demodulation circuit
JPS55102975A (en) Television receiver
JPS5752207A (en) Frequency modulation demodulating circuit
JPS6460087A (en) Signal processing circuit
JPS55117314A (en) Fm demodulator
JPS57162560A (en) Reproducing circuit of demodulating carrier wave
JPS5840934A (en) Controlling circuit of frequency characteristic
JPS5560391A (en) Photo recorder for low-carrier fm signal
JPS6489821A (en) Am/fm receiver
JPS55134511A (en) Pulse-width modulating-amplifying circuit
JPS57186815A (en) Amplitude modulation radio receiver