JPS5732191A - Signal discriminating circuit - Google Patents

Signal discriminating circuit

Info

Publication number
JPS5732191A
JPS5732191A JP10809580A JP10809580A JPS5732191A JP S5732191 A JPS5732191 A JP S5732191A JP 10809580 A JP10809580 A JP 10809580A JP 10809580 A JP10809580 A JP 10809580A JP S5732191 A JPS5732191 A JP S5732191A
Authority
JP
Japan
Prior art keywords
discrimination
intervals
circuit
discrimination signals
output currents
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
JP10809580A
Other languages
Japanese (ja)
Other versions
JPS6225317B2 (en
Inventor
Kazuo Tokuda
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP10809580A priority Critical patent/JPS5732191A/en
Publication of JPS5732191A publication Critical patent/JPS5732191A/en
Publication of JPS6225317B2 publication Critical patent/JPS6225317B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/44—Colour synchronisation
    • H04N9/47—Colour synchronisation for sequential signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To obtain sufficient discrimination sensitivity and color killer sensitivity, by advantageously considering that a SECAM color signal has different-frequency discrimination signals which alternate at intervals of one line. CONSTITUTION:To an input terminal 2, a color signal input containing discrimination signals is applied as an FM detection input. To a gate termial 3, a gate pulse for extracting the discrimination signals is applied. Then, an FM detecting circuit 1 extracts detection output currents IO1 and IO2 only during a gate pulse period. Transistors 5-8, on the other hand, alternate the detection output currents of the circuit at intervals of one horizontal period and are driven by an FF circuit driving a SECAM switch. Therefore, a discrimination output current flowing from an output terminal 12 is extracted by being inverted in polarity at intervals of one line as the detection output currents of the discrimination signals obtained by the FM detecting circuit 1.
JP10809580A 1980-08-06 1980-08-06 Signal discriminating circuit Granted JPS5732191A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10809580A JPS5732191A (en) 1980-08-06 1980-08-06 Signal discriminating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10809580A JPS5732191A (en) 1980-08-06 1980-08-06 Signal discriminating circuit

Publications (2)

Publication Number Publication Date
JPS5732191A true JPS5732191A (en) 1982-02-20
JPS6225317B2 JPS6225317B2 (en) 1987-06-02

Family

ID=14475739

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10809580A Granted JPS5732191A (en) 1980-08-06 1980-08-06 Signal discriminating circuit

Country Status (1)

Country Link
JP (1) JPS5732191A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60103794A (en) * 1983-11-10 1985-06-08 Matsushita Electric Ind Co Ltd Recording and reproducing device
JPS60134590A (en) * 1983-12-22 1985-07-17 Fuji Photo Film Co Ltd Line sequential discriminating circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50146259A (en) * 1974-05-14 1975-11-22
JPS5475981A (en) * 1977-11-30 1979-06-18 Hitachi Ltd Electronic switching circuit
JPS54100625A (en) * 1978-01-26 1979-08-08 Toshiba Corp Phase detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50146259A (en) * 1974-05-14 1975-11-22
JPS5475981A (en) * 1977-11-30 1979-06-18 Hitachi Ltd Electronic switching circuit
JPS54100625A (en) * 1978-01-26 1979-08-08 Toshiba Corp Phase detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60103794A (en) * 1983-11-10 1985-06-08 Matsushita Electric Ind Co Ltd Recording and reproducing device
JPS60134590A (en) * 1983-12-22 1985-07-17 Fuji Photo Film Co Ltd Line sequential discriminating circuit

Also Published As

Publication number Publication date
JPS6225317B2 (en) 1987-06-02

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