JPS55162620A - Electronic tuning type receiver - Google Patents

Electronic tuning type receiver

Info

Publication number
JPS55162620A
JPS55162620A JP6990979A JP6990979A JPS55162620A JP S55162620 A JPS55162620 A JP S55162620A JP 6990979 A JP6990979 A JP 6990979A JP 6990979 A JP6990979 A JP 6990979A JP S55162620 A JPS55162620 A JP S55162620A
Authority
JP
Japan
Prior art keywords
frequency
counter
variation
signal
output
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
JP6990979A
Other languages
Japanese (ja)
Inventor
Michiaki Kurosawa
Ichiro Hondo
Tadashi Sakikawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6990979A priority Critical patent/JPS55162620A/en
Publication of JPS55162620A publication Critical patent/JPS55162620A/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
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/06—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To enable stabilization of reception frequency, even with ambient temperature and power supply voltage in variation, by correcting the variation of local oscillating frequency. CONSTITUTION:When the local oscillating frequency of the local oscillator 13 of the reception circuit 10 is changed due to change in ambient temperature, the output signal B of the frequency counter 33 is changed to B', the comparison signal of the comparator 53 is in the state of A B, and the channel selection control signal according to the difference is appeared at the output. This signal is fed to the code signal generator 2 via the tuning control signal generator 22. This output changes DC analog value of the D/A converter 24, controls the local oscillator 13, and frequency control is continued until the counter output signal of the counter 33 is in agreement with the content stored in the first memory circuit 511, before the frequency variation in the control loop of the oscillator 13 counter 20 frequency correector 50 channel selector 20, allowing to correct the local oscillating frequency into the frequency before variation.
JP6990979A 1979-06-06 1979-06-06 Electronic tuning type receiver Pending JPS55162620A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6990979A JPS55162620A (en) 1979-06-06 1979-06-06 Electronic tuning type receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6990979A JPS55162620A (en) 1979-06-06 1979-06-06 Electronic tuning type receiver

Publications (1)

Publication Number Publication Date
JPS55162620A true JPS55162620A (en) 1980-12-18

Family

ID=13416288

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6990979A Pending JPS55162620A (en) 1979-06-06 1979-06-06 Electronic tuning type receiver

Country Status (1)

Country Link
JP (1) JPS55162620A (en)

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