JPS568972A - Automatic sweep channel selector - Google Patents

Automatic sweep channel selector

Info

Publication number
JPS568972A
JPS568972A JP8463279A JP8463279A JPS568972A JP S568972 A JPS568972 A JP S568972A JP 8463279 A JP8463279 A JP 8463279A JP 8463279 A JP8463279 A JP 8463279A JP S568972 A JPS568972 A JP S568972A
Authority
JP
Japan
Prior art keywords
counter
output
signal
control part
tuning
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
JP8463279A
Other languages
Japanese (ja)
Other versions
JPS6111026B2 (en
Inventor
Minoru Ueda
Kazumi Kawashima
Sadahiro Takuhara
Hirosuke Yamamoto
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 JP8463279A priority Critical patent/JPS568972A/en
Publication of JPS568972A publication Critical patent/JPS568972A/en
Publication of JPS6111026B2 publication Critical patent/JPS6111026B2/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
    • H03J7/18—Automatic scanning over a band of frequencies
    • H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element
    • H03J7/28—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element using counters or frequency dividers

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To attain accurate tuning to a center frequency by inverting a sweep direction when a discrimination output in an automatic sweep exceeds a center voltage. CONSTITUTION:With switch ASW, search control part 11 is placed in automatic sweep mode and then signal RE resets selecting circuit 3 and counter 6. Next, counter 6 starts count-up operation with signal CU. Tuner 10 starts tuning operation by the output of counter 10 and control part 11 supervises a tuning discrimination output from AFC circuit part 18. Control part 11, when the output reaches a certain value exceeding a center voltage, uses horizontal and vertical synchronizing signals Hs and Vs and flyback pulse FBP from synchronous separating circuit 20 to find that broadcast signals are received properly and then makes counter 6 count down at a low speed with signal CU. When the discrimination output is equalized again to the center voltage, the value of the counter is stored in memory part 5 and then used for repetitive time channel selection.
JP8463279A 1979-07-04 1979-07-04 Automatic sweep channel selector Granted JPS568972A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8463279A JPS568972A (en) 1979-07-04 1979-07-04 Automatic sweep channel selector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8463279A JPS568972A (en) 1979-07-04 1979-07-04 Automatic sweep channel selector

Publications (2)

Publication Number Publication Date
JPS568972A true JPS568972A (en) 1981-01-29
JPS6111026B2 JPS6111026B2 (en) 1986-04-01

Family

ID=13836053

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8463279A Granted JPS568972A (en) 1979-07-04 1979-07-04 Automatic sweep channel selector

Country Status (1)

Country Link
JP (1) JPS568972A (en)

Also Published As

Publication number Publication date
JPS6111026B2 (en) 1986-04-01

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