JPS5621424A - Receiving frequency display system - Google Patents

Receiving frequency display system

Info

Publication number
JPS5621424A
JPS5621424A JP9800879A JP9800879A JPS5621424A JP S5621424 A JPS5621424 A JP S5621424A JP 9800879 A JP9800879 A JP 9800879A JP 9800879 A JP9800879 A JP 9800879A JP S5621424 A JPS5621424 A JP S5621424A
Authority
JP
Japan
Prior art keywords
generated
frequency
notation
rounding
receiving frequency
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
JP9800879A
Other languages
Japanese (ja)
Inventor
Yasuhiko Okuyama
Hiroshi Koyama
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.)
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Original Assignee
Tokyo Sanyo Electric Co Ltd
Sanyo 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 Tokyo Sanyo Electric Co Ltd, Sanyo Electric Co Ltd filed Critical Tokyo Sanyo Electric Co Ltd
Priority to JP9800879A priority Critical patent/JPS5621424A/en
Publication of JPS5621424A publication Critical patent/JPS5621424A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/02—Indicating arrangements
    • H03J1/04—Indicating arrangements with optical indicating means
    • H03J1/045—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like
    • H03J1/047—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like using electronic means, e.g. LED's
    • H03J1/048—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like using electronic means, e.g. LED's with digital indication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To make a receiving frequency accurate and easy to read, by displaying the frequency which is not subjected to rounding for every N notation at a tuning operation time but is subjected to rounding of N notation when the operator lets go his hold of the knob. CONSTITUTION:When the tuning knob is turned, a control pulse is generated and flip-flop 12 is reset to correct the count of local oscillation frequency f0 and the IF preset value. At this time, display equipment 5 displays the frequency by 1Hz unit. Outputs of latch circuit 2 and counter 1 are input to coincidence detecting circuit 8; and if they coincide with each other, ''H'' is generated; and if not, ''L'' is generated. When the tuning operation is stopped, ''H'' is generated. As a result, the IF preset value changes from ''455'' to ''459'', and counter 1 performs rounding for every 9 notation. Consequently, an accurate receiving frequency is displayed on display equipment 5.
JP9800879A 1979-07-31 1979-07-31 Receiving frequency display system Pending JPS5621424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9800879A JPS5621424A (en) 1979-07-31 1979-07-31 Receiving frequency display system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9800879A JPS5621424A (en) 1979-07-31 1979-07-31 Receiving frequency display system

Publications (1)

Publication Number Publication Date
JPS5621424A true JPS5621424A (en) 1981-02-27

Family

ID=14207697

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9800879A Pending JPS5621424A (en) 1979-07-31 1979-07-31 Receiving frequency display system

Country Status (1)

Country Link
JP (1) JPS5621424A (en)

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