JPS5564492A - Automatic phase control circuit - Google Patents

Automatic phase control circuit

Info

Publication number
JPS5564492A
JPS5564492A JP13804178A JP13804178A JPS5564492A JP S5564492 A JPS5564492 A JP S5564492A JP 13804178 A JP13804178 A JP 13804178A JP 13804178 A JP13804178 A JP 13804178A JP S5564492 A JPS5564492 A JP S5564492A
Authority
JP
Japan
Prior art keywords
signal
phase
apc operation
reference signal
semistable
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.)
Granted
Application number
JP13804178A
Other languages
Japanese (ja)
Other versions
JPS6022866B2 (en
Inventor
Shinji Kaneko
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP53138041A priority Critical patent/JPS6022866B2/en
Publication of JPS5564492A publication Critical patent/JPS5564492A/en
Publication of JPS6022866B2 publication Critical patent/JPS6022866B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To prevent APC operation from reaching a semistable point by making a decision on whether a difference in phase between a reference signal and burst signal is within a fixed range and then by inverting a carrier in accordance with the result.
CONSTITUTION: From regenerated signals from head 9, chroma signal SC is extracted by BPF11 and frequency-modulated luminance signals through HPF10 are demodulated 12 and led to adder 13. In reproduction in a certain field period, switch 24 is closed to make phase comparison 19 between burst signal SB extracted from signal SC by gate 18 and reference signal SSC from oscillator 20 and on the basis of its output, APC operation is carried out. With this phase difference between 0°∼-180°, the phase of the reference signal to balanced modulator (BM)22 is inverted to invert the phase of the carrier signal to BM14, and consequently the phase distortion of signal SC is eliminated, so that the APC operation can be prevented from reaching a semistable point.
COPYRIGHT: (C)1980,JPO&Japio
JP53138041A 1978-11-09 1978-11-09 Magnetic recording and reproducing device with automatic phase control circuit Expired JPS6022866B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53138041A JPS6022866B2 (en) 1978-11-09 1978-11-09 Magnetic recording and reproducing device with automatic phase control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53138041A JPS6022866B2 (en) 1978-11-09 1978-11-09 Magnetic recording and reproducing device with automatic phase control circuit

Publications (2)

Publication Number Publication Date
JPS5564492A true JPS5564492A (en) 1980-05-15
JPS6022866B2 JPS6022866B2 (en) 1985-06-04

Family

ID=15212631

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53138041A Expired JPS6022866B2 (en) 1978-11-09 1978-11-09 Magnetic recording and reproducing device with automatic phase control circuit

Country Status (1)

Country Link
JP (1) JPS6022866B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2667265A1 (en) * 2012-05-22 2013-11-27 The Swatch Group Research and Development Ltd. Brazed bi-metal timepiece external component

Also Published As

Publication number Publication date
JPS6022866B2 (en) 1985-06-04

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