JPS558146A - Automatic frequency adjuster - Google Patents

Automatic frequency adjuster

Info

Publication number
JPS558146A
JPS558146A JP8085478A JP8085478A JPS558146A JP S558146 A JPS558146 A JP S558146A JP 8085478 A JP8085478 A JP 8085478A JP 8085478 A JP8085478 A JP 8085478A JP S558146 A JPS558146 A JP S558146A
Authority
JP
Japan
Prior art keywords
correct value
circuit
case
clock signal
counter
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
JP8085478A
Other languages
Japanese (ja)
Other versions
JPS5842652B2 (en
Inventor
Masahiro Fujita
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP53080854A priority Critical patent/JPS5842652B2/en
Publication of JPS558146A publication Critical patent/JPS558146A/en
Publication of JPS5842652B2 publication Critical patent/JPS5842652B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To secure a quick correction to the correct value in case the tuning voltage has a shift by counting the time from the 1st to 2nd genration of the stop signal and then adding the half of the counted time to the counter.
CONSTITUTION: In case a certain channel is received and the synchronism has a shift, AFT deciding pulse signal generation circuit 52 operates. As a result, the syncronous circuit is corrected to be changed toward the correct value. In this case, the tuning voltage stops its change by the delay of the answer of the AFT signal when the voltage passes through the correct value, and then changes again toward the correct value. In this instant, the clock signal different from the clock which is given from clock signal generation circuit 15 is applied to the counter of one side of clock signal control circuit 55 via the stop signal delivered from circuit 44, and the tuning voltage passes away the correct value and stops to begin to be corrected backward. In this case, the clock signal of double frequency is supplied concurrently to the other counter. And when an agreement is obtained for the count value between both counters, the supply of the colck signals is stopped to circuit 52 to complete the correction.
COPYRIGHT: (C)1980,JPO&Japio
JP53080854A 1978-07-05 1978-07-05 automatic frequency adjustment device Expired JPS5842652B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53080854A JPS5842652B2 (en) 1978-07-05 1978-07-05 automatic frequency adjustment device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53080854A JPS5842652B2 (en) 1978-07-05 1978-07-05 automatic frequency adjustment device

Publications (2)

Publication Number Publication Date
JPS558146A true JPS558146A (en) 1980-01-21
JPS5842652B2 JPS5842652B2 (en) 1983-09-21

Family

ID=13729926

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53080854A Expired JPS5842652B2 (en) 1978-07-05 1978-07-05 automatic frequency adjustment device

Country Status (1)

Country Link
JP (1) JPS5842652B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5224019A (en) * 1975-08-19 1977-02-23 Meguro Denpa Sokki Kk Tuning receive system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5224019A (en) * 1975-08-19 1977-02-23 Meguro Denpa Sokki Kk Tuning receive system

Also Published As

Publication number Publication date
JPS5842652B2 (en) 1983-09-21

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