JPS5479015A - Sampling pulse generating circuit - Google Patents

Sampling pulse generating circuit

Info

Publication number
JPS5479015A
JPS5479015A JP14608377A JP14608377A JPS5479015A JP S5479015 A JPS5479015 A JP S5479015A JP 14608377 A JP14608377 A JP 14608377A JP 14608377 A JP14608377 A JP 14608377A JP S5479015 A JPS5479015 A JP S5479015A
Authority
JP
Japan
Prior art keywords
synchronizing signal
horizontal synchronizing
sampling
pulse
pulses
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
JP14608377A
Other languages
Japanese (ja)
Inventor
Eiji Matsuda
Masabumi Onishi
Kazunori Nonaka
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.)
Hitachi Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone 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 Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP14608377A priority Critical patent/JPS5479015A/en
Publication of JPS5479015A publication Critical patent/JPS5479015A/en
Pending legal-status Critical Current

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  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE: To obtain sampling pulses stable to horizontal synchronizing signal by always taking the phase synchronization of sampling with the horizontal synchronizing signal thereby generating clock pulses.
CONSTITUTION: A monostable multi 13 outputs the pulse signal of negative characteristics of a pulse width longer than 1/2 of the period of the horizontal synchronizing signal and shorter than 1 at the pulse fall of the TV composite synchronizing signal. This is to make the period of the vertical and horizontal equalization pulses the same as the period of the horizontal synchronizing signal and the fall frequency of each pulse coincides with that of the horizontal synchronizing signal. When the VCO 17 of a frequency multiplier generates the clock pulses necessary for sampling and flows the same to a clock control circuit 10 and frequency dividing counter 18, the circuit 10 makes the same to the output of a sampling pulse generating circuit at the time necessary for sampling and the counter 18 makes them the same frequency as that of the horizontal synchronizing signal and supplies these to a PD 15 thereby making the clock pulses free from any phase difference. Hence, the sampling pulses stable to the horizontal synchronizing signal may be obtained.
COPYRIGHT: (C)1979,JPO&Japio
JP14608377A 1977-12-07 1977-12-07 Sampling pulse generating circuit Pending JPS5479015A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14608377A JPS5479015A (en) 1977-12-07 1977-12-07 Sampling pulse generating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14608377A JPS5479015A (en) 1977-12-07 1977-12-07 Sampling pulse generating circuit

Publications (1)

Publication Number Publication Date
JPS5479015A true JPS5479015A (en) 1979-06-23

Family

ID=15399724

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14608377A Pending JPS5479015A (en) 1977-12-07 1977-12-07 Sampling pulse generating circuit

Country Status (1)

Country Link
JP (1) JPS5479015A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5789140A (en) * 1980-11-25 1982-06-03 Yokogawa Hokushin Electric Corp Hard copying machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50138721A (en) * 1974-04-23 1975-11-05
JPS511024A (en) * 1974-06-21 1976-01-07 Sony Corp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50138721A (en) * 1974-04-23 1975-11-05
JPS511024A (en) * 1974-06-21 1976-01-07 Sony Corp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5789140A (en) * 1980-11-25 1982-06-03 Yokogawa Hokushin Electric Corp Hard copying machine
JPS6143731B2 (en) * 1980-11-25 1986-09-29 Yokogawa Hokushin Electric

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