JPS5715526A - Signal detecting circuit - Google Patents

Signal detecting circuit

Info

Publication number
JPS5715526A
JPS5715526A JP9025580A JP9025580A JPS5715526A JP S5715526 A JPS5715526 A JP S5715526A JP 9025580 A JP9025580 A JP 9025580A JP 9025580 A JP9025580 A JP 9025580A JP S5715526 A JPS5715526 A JP S5715526A
Authority
JP
Japan
Prior art keywords
output
signal detecting
high level
low level
level
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
JP9025580A
Other languages
Japanese (ja)
Other versions
JPS6144412B2 (en
Inventor
Kazumi Kawashima
Sadahiro Takuhara
Masaaki Fujita
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP9025580A priority Critical patent/JPS5715526A/en
Publication of JPS5715526A publication Critical patent/JPS5715526A/en
Publication of JPS6144412B2 publication Critical patent/JPS6144412B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control

Landscapes

  • Television Receiver Circuits (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To reduce number of pins and to make circuit integration easy, by making signal detecting output terminals requiring 4 output terminals into one signal output terminal through the use of a tri-state output. CONSTITUTION:A detected output A of an AFC is applied to 5 comparators 26- 30, where 5-level comparison is made to obtain one input and the 1st-5th reference voltages H, I, J, K, L are applied to the other input. When the output V of comparator 20 is at a low level and the presence of television signal is detected, if the output S of an OR gate 38 is at a high level, a transistor (TR) 41 is conductive, and if the output U of an OR gate 40 is at high level, a TR42 is conductive. The output W to an output terminal 43 is at low level, and if the output U is at low level, the output W is at high level.
JP9025580A 1980-07-01 1980-07-01 Signal detecting circuit Granted JPS5715526A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9025580A JPS5715526A (en) 1980-07-01 1980-07-01 Signal detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9025580A JPS5715526A (en) 1980-07-01 1980-07-01 Signal detecting circuit

Publications (2)

Publication Number Publication Date
JPS5715526A true JPS5715526A (en) 1982-01-26
JPS6144412B2 JPS6144412B2 (en) 1986-10-02

Family

ID=13993377

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9025580A Granted JPS5715526A (en) 1980-07-01 1980-07-01 Signal detecting circuit

Country Status (1)

Country Link
JP (1) JPS5715526A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5051270A (en) * 1988-02-03 1991-09-24 Otsuka Pharmaceutical Co., Ltd. High protein nutritive food and process for preparing same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5051270A (en) * 1988-02-03 1991-09-24 Otsuka Pharmaceutical Co., Ltd. High protein nutritive food and process for preparing same

Also Published As

Publication number Publication date
JPS6144412B2 (en) 1986-10-02

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