JPS5552687A - Synchronous signal generating device - Google Patents

Synchronous signal generating device

Info

Publication number
JPS5552687A
JPS5552687A JP12494678A JP12494678A JPS5552687A JP S5552687 A JPS5552687 A JP S5552687A JP 12494678 A JP12494678 A JP 12494678A JP 12494678 A JP12494678 A JP 12494678A JP S5552687 A JPS5552687 A JP S5552687A
Authority
JP
Japan
Prior art keywords
counter
division ratio
horizontal
featuring
output
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
JP12494678A
Other languages
Japanese (ja)
Inventor
Mitsushige Tadami
Kunihiro Kuroyanagi
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 JP12494678A priority Critical patent/JPS5552687A/en
Publication of JPS5552687A publication Critical patent/JPS5552687A/en
Pending legal-status Critical Current

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  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE: To obtain the horizontal frequency signals of the same frequency via the common counter circuit from the frequency signals featuring the frequencies of the integar multiplication of the chrominance subcarrier frequencies of both the TV NTSC and PAL systems.
CONSTITUTION: The horizontal frequencies feature same fH, and the chrominance subcarrier frequency features fsc1=5/4×182×fH in the NTSC system and fsc2= 5/4×(182-1/5)×fh in the PAL system each. Oscillators 20 and 21 of 4fsc1 and 4fsc2 are connected to dividing counter 42 featuring the 1/5 division ratio via switch 22. The output of counter 42 is supplied to dividing counter 43 featuring the 1/182 division ratio, and the output is supplied to the circuit consisting of PLL2 and synchronous signal generator circuit 3 to obtain the output of horizontal driving signals or the like through terminals 7∼11. When oscillator 21 of the PAL system is selected, contact 31 is connected to contact 32 with supply of the control signal from IC47 to IC44. Thus counter 42 operates as a divider which features the constant division ratio of 1/5 which changes once to division ratio of 1/4 with every horizontal cycle.
COPYRIGHT: (C)1980,JPO&Japio
JP12494678A 1978-10-11 1978-10-11 Synchronous signal generating device Pending JPS5552687A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12494678A JPS5552687A (en) 1978-10-11 1978-10-11 Synchronous signal generating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12494678A JPS5552687A (en) 1978-10-11 1978-10-11 Synchronous signal generating device

Publications (1)

Publication Number Publication Date
JPS5552687A true JPS5552687A (en) 1980-04-17

Family

ID=14898103

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12494678A Pending JPS5552687A (en) 1978-10-11 1978-10-11 Synchronous signal generating device

Country Status (1)

Country Link
JP (1) JPS5552687A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5923995A (en) * 1982-07-30 1984-02-07 Nec Home Electronics Ltd Device for outputting display signal
JPS62104393A (en) * 1985-10-31 1987-05-14 Fuji Photo Film Co Ltd Pulse generating circuit of video signal reproducing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5923995A (en) * 1982-07-30 1984-02-07 Nec Home Electronics Ltd Device for outputting display signal
JPS62104393A (en) * 1985-10-31 1987-05-14 Fuji Photo Film Co Ltd Pulse generating circuit of video signal reproducing device

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