JPS577622A - Electronic tuner - Google Patents

Electronic tuner

Info

Publication number
JPS577622A
JPS577622A JP8225480A JP8225480A JPS577622A JP S577622 A JPS577622 A JP S577622A JP 8225480 A JP8225480 A JP 8225480A JP 8225480 A JP8225480 A JP 8225480A JP S577622 A JPS577622 A JP S577622A
Authority
JP
Japan
Prior art keywords
signal
sweep
frequency
division
ratio data
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
JP8225480A
Other languages
Japanese (ja)
Other versions
JPS6049375B2 (en
Inventor
Hiroshi Tanaka
Osamu Ikeda
Yoshiro Nakayama
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 JP8225480A priority Critical patent/JPS6049375B2/en
Priority to US06/272,088 priority patent/US4476580A/en
Priority to DE8181302734T priority patent/DE3173106D1/en
Priority to EP81302734A priority patent/EP0042728B1/en
Publication of JPS577622A publication Critical patent/JPS577622A/en
Publication of JPS6049375B2 publication Critical patent/JPS6049375B2/en
Expired 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
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H03J1/0041—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers
    • H03J1/005—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers in a loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To sweep any broadcast frequency while improving tuning precision by applying a voltage synthesizer system, utilizing an S curve signal for acquiring a right tuning point and stopping the sweep during sweeping channel selection, to an electronic tuner. CONSTITUTION:When a changeover switch 28 is placed at an automatic sweep mode position and an up-key 29 is pushed, a high-speed sweep is started with a control signal from a control circuit 17. When an S curve signal Sin decreases below a low threshold level VSL, a wind comparator 14 generates an SL signal and a control circuit 17 generates a signal H/L signal for a low-speed sweep; when the S curve signal increases above a high threshold level VSH, the sweep is stopped with an SH signal from the comparator 14. A local oscillation frequency, on the other hand, is counted by an up-counter 19 and, during an AFC operation period, converted by a frequency-division-ratio data converting circuit 24 into frequency- division-ratio data for a programmable divider, and the local oscillation frequency of the best tuning point is converted into the frequency-division ratio data, which is used for reception by PLL operation.
JP8225480A 1980-06-17 1980-06-17 electronic tuning device Expired JPS6049375B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP8225480A JPS6049375B2 (en) 1980-06-17 1980-06-17 electronic tuning device
US06/272,088 US4476580A (en) 1980-06-17 1981-06-10 Automatic continuous tuning control apparatus for a receiver
DE8181302734T DE3173106D1 (en) 1980-06-17 1981-06-17 Tuning control apparatus of receiver having electronic tuner
EP81302734A EP0042728B1 (en) 1980-06-17 1981-06-17 Tuning control apparatus of receiver having electronic tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8225480A JPS6049375B2 (en) 1980-06-17 1980-06-17 electronic tuning device

Publications (2)

Publication Number Publication Date
JPS577622A true JPS577622A (en) 1982-01-14
JPS6049375B2 JPS6049375B2 (en) 1985-11-01

Family

ID=13769300

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8225480A Expired JPS6049375B2 (en) 1980-06-17 1980-06-17 electronic tuning device

Country Status (1)

Country Link
JP (1) JPS6049375B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59152824U (en) * 1983-03-29 1984-10-13 パイオニア株式会社 Electronic tuner tuning device
JPH0241015A (en) * 1988-07-29 1990-02-09 Aiwa Co Ltd Receiver with synthesizer tuner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59152824U (en) * 1983-03-29 1984-10-13 パイオニア株式会社 Electronic tuner tuning device
JPH0241015A (en) * 1988-07-29 1990-02-09 Aiwa Co Ltd Receiver with synthesizer tuner

Also Published As

Publication number Publication date
JPS6049375B2 (en) 1985-11-01

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