JPS5720020A - Receiver - Google Patents

Receiver

Info

Publication number
JPS5720020A
JPS5720020A JP9450180A JP9450180A JPS5720020A JP S5720020 A JPS5720020 A JP S5720020A JP 9450180 A JP9450180 A JP 9450180A JP 9450180 A JP9450180 A JP 9450180A JP S5720020 A JPS5720020 A JP S5720020A
Authority
JP
Japan
Prior art keywords
output
switch
closed
down counter
100khz
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.)
Pending
Application number
JP9450180A
Other languages
Japanese (ja)
Inventor
Toshiki Murakami
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 JP9450180A priority Critical patent/JPS5720020A/en
Publication of JPS5720020A publication Critical patent/JPS5720020A/en
Pending 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 speed receiving operation by making a sweep speed higher fast feeding than in step feeding. CONSTITUTION:When an up switch 2 is closed within 500ms, a switch 4 is also closed and an FF10 is set, so that an output Q is at a lever H for 500ms from this point in time. Consequently, an output pulse is applied from a reference oscillator 1 to the up the up input of an up-down counter via an AND gate 11 to increase the frequency in steps of 100kHz. Then, the output is supplied to a PLL circuit 9, so the reception frequency is swept by only 100kHz. When the switch 2 is pushed continuously for >=500ms, the FF10 is inverted 500ms later, so AND gates 10 and 11 are closed while AND gates 13 and 14 are opened. Consequently, the output of an oscillator 1 is applied to the up-down counter 7 via the gate 13, so that the up- down counter 7 goes up in steps of 300kHz from the reception frequency, set by step feeding, as a preset value.
JP9450180A 1980-07-09 1980-07-09 Receiver Pending JPS5720020A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9450180A JPS5720020A (en) 1980-07-09 1980-07-09 Receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9450180A JPS5720020A (en) 1980-07-09 1980-07-09 Receiver

Publications (1)

Publication Number Publication Date
JPS5720020A true JPS5720020A (en) 1982-02-02

Family

ID=14112052

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9450180A Pending JPS5720020A (en) 1980-07-09 1980-07-09 Receiver

Country Status (1)

Country Link
JP (1) JPS5720020A (en)

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