JPS5583331A - Reception frequency setter of receiver - Google Patents

Reception frequency setter of receiver

Info

Publication number
JPS5583331A
JPS5583331A JP16034178A JP16034178A JPS5583331A JP S5583331 A JPS5583331 A JP S5583331A JP 16034178 A JP16034178 A JP 16034178A JP 16034178 A JP16034178 A JP 16034178A JP S5583331 A JPS5583331 A JP S5583331A
Authority
JP
Japan
Prior art keywords
oscillator
output frequency
output
less
circuit
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
JP16034178A
Other languages
Japanese (ja)
Inventor
Tetsuo Takahashi
Takashi Yamanouchi
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.)
TRIO KENWOOD CORP
Kenwood KK
Original Assignee
TRIO KENWOOD CORP
Kenwood KK
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 TRIO KENWOOD CORP, Kenwood KK filed Critical TRIO KENWOOD CORP
Priority to JP16034178A priority Critical patent/JPS5583331A/en
Publication of JPS5583331A publication Critical patent/JPS5583331A/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
    • H03J7/18—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
    • H03J7/22—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element in which an automatic frequency control circuit is brought into action after the scanning action has been stopped

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To make it possible to set digitally a reception frequency even by a tuner circuit using a variable capacitor by controlling the output frequency of a local oscillator by making a comparison between its count value and digital set value. CONSTITUTION:For example, when the output frequency of local oscillator 3 should be 69.3MHz, set value N0 of digital setter 10 has three high-order digits 6, 9 and 3 in sequence. Now, when the output frequency of oscillator 3 is not less than 69.4MHz, output N1 of counter 9 is not less than 694 and the comparison value of digital comparator 11 results in N1>N0. For the purpose, AFC operation of AFC circuit 8 is turned OFF and motor 13 is driven to reduce the output frequency of oscillator 3. On the other hand, when the output frequency of oscillator 3 is less than 69.3MHz, the output frequency of oscillator 3 is increased. Next, when the output frequency of oscillator 3 is between 69.30 and 69.39MHz, the output of counter 9 is 693, resulting in N1=N0. Therefore, motor 13 is stopped and circuit 8 is put into AFC operation. Consequently, the output frequency of oscillator 3 is adjusted.
JP16034178A 1978-12-20 1978-12-20 Reception frequency setter of receiver Pending JPS5583331A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16034178A JPS5583331A (en) 1978-12-20 1978-12-20 Reception frequency setter of receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16034178A JPS5583331A (en) 1978-12-20 1978-12-20 Reception frequency setter of receiver

Publications (1)

Publication Number Publication Date
JPS5583331A true JPS5583331A (en) 1980-06-23

Family

ID=15712880

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16034178A Pending JPS5583331A (en) 1978-12-20 1978-12-20 Reception frequency setter of receiver

Country Status (1)

Country Link
JP (1) JPS5583331A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6139616A (en) * 1984-07-30 1986-02-25 Koden Electronics Co Ltd Automatic tuning device
JPS6454422U (en) * 1988-01-20 1989-04-04
US8419407B2 (en) 2007-10-05 2013-04-16 Nok Corporation Extruder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6139616A (en) * 1984-07-30 1986-02-25 Koden Electronics Co Ltd Automatic tuning device
JPS6454422U (en) * 1988-01-20 1989-04-04
US8419407B2 (en) 2007-10-05 2013-04-16 Nok Corporation Extruder

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