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JPS55124320A - Afc reference voltage correction circuit of receiver - Google Patents

Afc reference voltage correction circuit of receiver

Info

Publication number
JPS55124320A
JPS55124320A JP3192679A JP3192679A JPS55124320A JP S55124320 A JPS55124320 A JP S55124320A JP 3192679 A JP3192679 A JP 3192679A JP 3192679 A JP3192679 A JP 3192679A JP S55124320 A JPS55124320 A JP S55124320A
Authority
JP
Japan
Prior art keywords
filter
turned
reference voltage
voltage
receiver
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
JP3192679A
Other languages
Japanese (ja)
Other versions
JPS5920284B2 (en
Inventor
Junji Hamada
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP3192679A priority Critical patent/JPS5920284B2/en
Publication of JPS55124320A publication Critical patent/JPS55124320A/en
Publication of JPS5920284B2 publication Critical patent/JPS5920284B2/en
Expired 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

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To always obtain the best receiving state by providing the circuit which corrects the deterioration with age for the IF filter to the AFC circuit and thus fitting the oscillation frequency of VCO to the best point of the IF filter. CONSTITUTION:Switches 2 and 11 are turned off and on respectively when the characteristics of IF filter 5 varies, and thus voltage DELTAV corresponding to the central frequency of filter 5 is generated at the output of detector 6 and then supplied to reference voltage generator 12 via LPF9 to be then stored. This voltage DELTAV is turned into the non-inverse input of differential amplifier 10 to be used for the reference voltage. Then switch 2 is turned on with switch 11 turned off each, and as a result the servo lock circuit leads in the oscillation frequency of VCO8 toward point A. Accordingly, the coincidence is secured between the S characteristics of detector 6 given with the correction of voltage DELTAV and the characteristics of filter 5, thus minimizing occurrence of the distortion.
JP3192679A 1979-03-19 1979-03-19 Receiver AFC reference voltage correction circuit Expired JPS5920284B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3192679A JPS5920284B2 (en) 1979-03-19 1979-03-19 Receiver AFC reference voltage correction circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3192679A JPS5920284B2 (en) 1979-03-19 1979-03-19 Receiver AFC reference voltage correction circuit

Publications (2)

Publication Number Publication Date
JPS55124320A true JPS55124320A (en) 1980-09-25
JPS5920284B2 JPS5920284B2 (en) 1984-05-12

Family

ID=12344569

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3192679A Expired JPS5920284B2 (en) 1979-03-19 1979-03-19 Receiver AFC reference voltage correction circuit

Country Status (1)

Country Link
JP (1) JPS5920284B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658438A (en) * 1984-09-17 1987-04-14 Alps Electric Co., Ltd. Receiver for satellite broadcasting service
JPS62167426U (en) * 1986-04-11 1987-10-23

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03110480U (en) * 1990-02-27 1991-11-13

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658438A (en) * 1984-09-17 1987-04-14 Alps Electric Co., Ltd. Receiver for satellite broadcasting service
JPS62167426U (en) * 1986-04-11 1987-10-23

Also Published As

Publication number Publication date
JPS5920284B2 (en) 1984-05-12

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