JPS577623A - Automatic sweeping device - Google Patents

Automatic sweeping device

Info

Publication number
JPS577623A
JPS577623A JP8225580A JP8225580A JPS577623A JP S577623 A JPS577623 A JP S577623A JP 8225580 A JP8225580 A JP 8225580A JP 8225580 A JP8225580 A JP 8225580A JP S577623 A JPS577623 A JP S577623A
Authority
JP
Japan
Prior art keywords
limit value
frequency
reception
sweep
sweeping
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
JP8225580A
Other languages
Japanese (ja)
Other versions
JPS6151809B2 (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 JP8225580A priority Critical patent/JPS577623A/en
Priority to US06/272,088 priority patent/US4476580A/en
Priority to EP81302734A priority patent/EP0042728B1/en
Priority to DE8181302734T priority patent/DE3173106D1/en
Publication of JPS577623A publication Critical patent/JPS577623A/en
Publication of JPS6151809B2 publication Critical patent/JPS6151809B2/ja
Granted 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 lock a reception frequency to an upper or lower-limit value through PLL operation when the reception frequency increases above the upper-limit value or decreases below the lower-limit value, by storing the upper-limit or lower-limit value of a reception band in a storing circuit in an automatic sweeping device. CONSTITUTION:When an automatic sweep mode is set with a switch 32 and an up key 33 is pushed, a sweep control circuit 16 generates a sweep signal with a control signal from a control circuit 17, and a voltage generating means 10 elevates a DC tuning voltage VT to make a going-up sweep. Meanwhile, a local oscillation frequency is counted by a counter 18 through a prescaler 19 and mixed with an intermediate frequency by a frequency converting circuit 27 to be converted into a reception frequency. Even if an S curve signal is not acquired even after the reception frequency reaches the upper-limit or lower-limit value of a reception band stored in a storing circuit 29 during the sweeping operation, it is locked first to the upper limit value through PLL operation and then to the lower-limit value of the reception band and the sweeping channel selection is restarted to stop the sweeping operation with the output of an S comparator 14.
JP8225580A 1980-06-17 1980-06-17 Automatic sweeping device Granted JPS577623A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP8225580A JPS577623A (en) 1980-06-17 1980-06-17 Automatic sweeping device
US06/272,088 US4476580A (en) 1980-06-17 1981-06-10 Automatic continuous tuning control apparatus for a receiver
EP81302734A EP0042728B1 (en) 1980-06-17 1981-06-17 Tuning control apparatus of receiver having electronic tuner
DE8181302734T DE3173106D1 (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
JP8225580A JPS577623A (en) 1980-06-17 1980-06-17 Automatic sweeping device

Publications (2)

Publication Number Publication Date
JPS577623A true JPS577623A (en) 1982-01-14
JPS6151809B2 JPS6151809B2 (en) 1986-11-11

Family

ID=13769329

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8225580A Granted JPS577623A (en) 1980-06-17 1980-06-17 Automatic sweeping device

Country Status (1)

Country Link
JP (1) JPS577623A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01171124U (en) * 1988-05-12 1989-12-04
JPH0241015A (en) * 1988-07-29 1990-02-09 Aiwa Co Ltd Receiver with synthesizer tuner
JPH05211424A (en) * 1992-01-30 1993-08-20 Nec Corp Frequency sweep range controller

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01171124U (en) * 1988-05-12 1989-12-04
JPH0241015A (en) * 1988-07-29 1990-02-09 Aiwa Co Ltd Receiver with synthesizer tuner
JPH05211424A (en) * 1992-01-30 1993-08-20 Nec Corp Frequency sweep range controller

Also Published As

Publication number Publication date
JPS6151809B2 (en) 1986-11-11

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