JPS5639619A - Automatic controller for tuning frequency - Google Patents

Automatic controller for tuning frequency

Info

Publication number
JPS5639619A
JPS5639619A JP11443379A JP11443379A JPS5639619A JP S5639619 A JPS5639619 A JP S5639619A JP 11443379 A JP11443379 A JP 11443379A JP 11443379 A JP11443379 A JP 11443379A JP S5639619 A JPS5639619 A JP S5639619A
Authority
JP
Japan
Prior art keywords
tuning
circuit
output
implementation
high precision
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
JP11443379A
Other languages
Japanese (ja)
Other versions
JPS5912210B2 (en
Inventor
Yoshiharu Ueki
Yoshiro Kunugi
Shozaburo Sakaguchi
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 JP11443379A priority Critical patent/JPS5912210B2/en
Publication of JPS5639619A publication Critical patent/JPS5639619A/en
Publication of JPS5912210B2 publication Critical patent/JPS5912210B2/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
    • H03J7/18—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 facilitate IC-implementation without the need to provide a temperature compensating circuit with high precision by making digital AFC possible by the tuning-frequency automatic controller of a tuner that provides preset channel selection and automatic search channel selection freely. CONSTITUTION:For example, as the output of window comparator 12 shifts in the positive direction according to the degree and direction of detuning, comparator output 3 falls in level and puts reversible counter 3 into operation so that the counting-down command will be given. Namely, clock signal CK is sent out via AND circuit 6 to permit counter 3 to count down. Subsequently, S-curve output A falls gradually down to the tuning point and when it reaches a fixed level or lower, stop signal E is generated by AND circuit 14 and tuning is attained. To prevent attraction to an adjacent intense-electic-field station in this case, preset reversible counter 4 is set to a specific value. Consequently, digital AFC is made possible and IC-implementation can be facilitated without the need to provide a temparature compensating circuit with high precision.
JP11443379A 1979-09-06 1979-09-06 Tuned frequency automatic control device Expired JPS5912210B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11443379A JPS5912210B2 (en) 1979-09-06 1979-09-06 Tuned frequency automatic control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11443379A JPS5912210B2 (en) 1979-09-06 1979-09-06 Tuned frequency automatic control device

Publications (2)

Publication Number Publication Date
JPS5639619A true JPS5639619A (en) 1981-04-15
JPS5912210B2 JPS5912210B2 (en) 1984-03-21

Family

ID=14637589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11443379A Expired JPS5912210B2 (en) 1979-09-06 1979-09-06 Tuned frequency automatic control device

Country Status (1)

Country Link
JP (1) JPS5912210B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62117836U (en) * 1986-01-14 1987-07-27
JPH01196912A (en) * 1988-02-01 1989-08-08 Maspro Denkoh Corp Satellite broadcast receiver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62117836U (en) * 1986-01-14 1987-07-27
JPH01196912A (en) * 1988-02-01 1989-08-08 Maspro Denkoh Corp Satellite broadcast receiver

Also Published As

Publication number Publication date
JPS5912210B2 (en) 1984-03-21

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