JPS6473865A - Horizontal synchronizing waveform generating device - Google Patents

Horizontal synchronizing waveform generating device

Info

Publication number
JPS6473865A
JPS6473865A JP23020387A JP23020387A JPS6473865A JP S6473865 A JPS6473865 A JP S6473865A JP 23020387 A JP23020387 A JP 23020387A JP 23020387 A JP23020387 A JP 23020387A JP S6473865 A JPS6473865 A JP S6473865A
Authority
JP
Japan
Prior art keywords
frequency division
2fsc
width
division circuit
circuit
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
JP23020387A
Other languages
Japanese (ja)
Other versions
JP2657917B2 (en
Inventor
Hisao Sato
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.)
Seiko Epson Corp
Hudson Soft Co Ltd
Original Assignee
Seiko Epson Corp
Hudson Soft 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 Seiko Epson Corp, Hudson Soft Co Ltd filed Critical Seiko Epson Corp
Priority to JP62230203A priority Critical patent/JP2657917B2/en
Publication of JPS6473865A publication Critical patent/JPS6473865A/en
Application granted granted Critical
Publication of JP2657917B2 publication Critical patent/JP2657917B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Synchronizing For Television (AREA)

Abstract

PURPOSE:To simplify a frequency division circuit, by realizing 455-frequency division required for the generation of one horizontal period by performing the frequency division of the prime factors 5, 7, and 13 of 455. CONSTITUTION:The frequency division circuit 3 outputs frequency division output 4 by a 5-frequency division circuit. The frequency division circuit 5 outputs frequency division output 6 by the frequency division circuit which performs 13-frequency division. The frequency division circuit 7 is the frequency division circuit which performs 7-frequency division. A signal 22 of 2fsc is frequency-divided to one-455th by the frequency division circuits 3, 5, and 7, and one horizontal period 455/2fsc is generated. Therefore, width from the start of a blank signal to that of a synchronizing pulse goes to 10/2fsc, synchronizing pulse width becomes 34/2fsc, the width from the trailing edge of the synchronizing pulse to the start of a burst gate goes to 5/2fsc, the width of the burst gate becomes 20/2fsc, and the width from the trailing edge of the burst gate to that of the blank signal goes to 10/2fsc. A cycle is 455/2fsc.
JP62230203A 1987-09-14 1987-09-14 Horizontal sync waveform generator Expired - Lifetime JP2657917B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62230203A JP2657917B2 (en) 1987-09-14 1987-09-14 Horizontal sync waveform generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62230203A JP2657917B2 (en) 1987-09-14 1987-09-14 Horizontal sync waveform generator

Publications (2)

Publication Number Publication Date
JPS6473865A true JPS6473865A (en) 1989-03-20
JP2657917B2 JP2657917B2 (en) 1997-09-30

Family

ID=16904192

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62230203A Expired - Lifetime JP2657917B2 (en) 1987-09-14 1987-09-14 Horizontal sync waveform generator

Country Status (1)

Country Link
JP (1) JP2657917B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6230477A (en) * 1985-07-31 1987-02-09 Toshiba Corp Synchronous connecting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6230477A (en) * 1985-07-31 1987-02-09 Toshiba Corp Synchronous connecting device

Also Published As

Publication number Publication date
JP2657917B2 (en) 1997-09-30

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