JPS57129071A - Field discriminating circuit - Google Patents

Field discriminating circuit

Info

Publication number
JPS57129071A
JPS57129071A JP1456181A JP1456181A JPS57129071A JP S57129071 A JPS57129071 A JP S57129071A JP 1456181 A JP1456181 A JP 1456181A JP 1456181 A JP1456181 A JP 1456181A JP S57129071 A JPS57129071 A JP S57129071A
Authority
JP
Japan
Prior art keywords
period
pulse
field
counter
pulse generator
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
JP1456181A
Other languages
Japanese (ja)
Other versions
JPS6117194B2 (en
Inventor
Yosuke Mazaki
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.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric 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 Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Priority to JP1456181A priority Critical patent/JPS57129071A/en
Publication of JPS57129071A publication Critical patent/JPS57129071A/en
Publication of JPS6117194B2 publication Critical patent/JPS6117194B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals
    • H04N5/10—Separation of line synchronising signal from frame synchronising signal or vice versa

Abstract

PURPOSE:To exactly set a field discriminating period, by using a counter for setting said discriminating period. CONSTITUTION:This circuit is provided with a counter 14 for counting each vertical synchronizing, equivalent and horizontal synchronizing pulse existing in a vertical blanking period, a pulse generator 12 for generating a pulse from starting to count the number prescribed in advance to the end, a pulse generator 15 for generating a pulse in case when a signal whose period is different from a prescribed period has been inputted, a gate circuit 16 to which an output of each pulse generator 12 and 15 is inputted, and an FF17 to which an output of this gate circuit is inputted. In this state, an odd field and an even field are discriminated by an output level of the FF17. In this way, the pulse counter for counting a synchronizing signal is used for setting a field discriminating period, and when this counter counts the prescribed number of pulses, the pulse generator 12 is reset, therefore, the field discriminating period is set exactly.
JP1456181A 1981-02-03 1981-02-03 Field discriminating circuit Granted JPS57129071A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1456181A JPS57129071A (en) 1981-02-03 1981-02-03 Field discriminating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1456181A JPS57129071A (en) 1981-02-03 1981-02-03 Field discriminating circuit

Publications (2)

Publication Number Publication Date
JPS57129071A true JPS57129071A (en) 1982-08-10
JPS6117194B2 JPS6117194B2 (en) 1986-05-06

Family

ID=11864561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1456181A Granted JPS57129071A (en) 1981-02-03 1981-02-03 Field discriminating circuit

Country Status (1)

Country Link
JP (1) JPS57129071A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2658867T3 (en) 2012-06-07 2018-03-12 Institut Curie Methods to detect inactivation of the homologous recombination pathway (BRCA1 / 2) in human tumors
US11149316B2 (en) 2013-12-09 2021-10-19 Institut Curie Methods for detecting inactivation of the homologous recombination pathway (BRCA1/2) in human tumors

Also Published As

Publication number Publication date
JPS6117194B2 (en) 1986-05-06

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