JPS54145425A - Controller for carrier frequency of fm signal - Google Patents

Controller for carrier frequency of fm signal

Info

Publication number
JPS54145425A
JPS54145425A JP5387778A JP5387778A JPS54145425A JP S54145425 A JPS54145425 A JP S54145425A JP 5387778 A JP5387778 A JP 5387778A JP 5387778 A JP5387778 A JP 5387778A JP S54145425 A JPS54145425 A JP S54145425A
Authority
JP
Japan
Prior art keywords
circuit
signal
carrier frequency
normal
output
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
JP5387778A
Other languages
Japanese (ja)
Other versions
JPS6219111B2 (en
Inventor
Satoru Komurasaki
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP5387778A priority Critical patent/JPS54145425A/en
Publication of JPS54145425A publication Critical patent/JPS54145425A/en
Publication of JPS6219111B2 publication Critical patent/JPS6219111B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Television Systems (AREA)

Abstract

PURPOSE: To control a normal carrier frequency over a wide range without using a crystal oscillator by coding a carrier frequency of the normal part of a sampled FM signal, by comparing it with a coded normal carrier frequency and by controlling the level of the normal modulation part which corresponds to the comparison deviation.
CONSTITUTION: This controller is equipped with separator circuit 8 which gates input FM signal (b) when receiving sampling signal (c) synchronizing with a horizontal synchronizing signal and frequency detection circuit 9 which codes the carrier frequency of the normal part of a FM signal sampled by this circuit 8. Then, digital comparator circuit 11 is provided which compares the output of circuit 9 with the coded normal carrier frequency of digital input circuit 10 so as to send out a deviation output. The output of this circuit 11 is converted by DA converter circuit 12 into an analog signal, which is applied to modulation circuit 6 via clamping circuit 5, thereby controlling the level of the normal modulation part equivalent to the comparison deviation.
COPYRIGHT: (C)1979,JPO&Japio
JP5387778A 1978-05-06 1978-05-06 Controller for carrier frequency of fm signal Granted JPS54145425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5387778A JPS54145425A (en) 1978-05-06 1978-05-06 Controller for carrier frequency of fm signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5387778A JPS54145425A (en) 1978-05-06 1978-05-06 Controller for carrier frequency of fm signal

Publications (2)

Publication Number Publication Date
JPS54145425A true JPS54145425A (en) 1979-11-13
JPS6219111B2 JPS6219111B2 (en) 1987-04-27

Family

ID=12954966

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5387778A Granted JPS54145425A (en) 1978-05-06 1978-05-06 Controller for carrier frequency of fm signal

Country Status (1)

Country Link
JP (1) JPS54145425A (en)

Also Published As

Publication number Publication date
JPS6219111B2 (en) 1987-04-27

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