Nothing Special   »   [go: up one dir, main page]

JPS5784695A - Control circuit for transmission frequency - Google Patents

Control circuit for transmission frequency

Info

Publication number
JPS5784695A
JPS5784695A JP16166080A JP16166080A JPS5784695A JP S5784695 A JPS5784695 A JP S5784695A JP 16166080 A JP16166080 A JP 16166080A JP 16166080 A JP16166080 A JP 16166080A JP S5784695 A JPS5784695 A JP S5784695A
Authority
JP
Japan
Prior art keywords
frequency
output
signal
color burst
pll 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
JP16166080A
Other languages
Japanese (ja)
Inventor
Hiroshi Igarashi
Minoru Kidena
Kazuyoshi Ichikawa
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.)
Fujitsu Ltd
Japan Broadcasting Corp
Original Assignee
Fujitsu Ltd
Nippon Hoso Kyokai NHK
Japan Broadcasting 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 Fujitsu Ltd, Nippon Hoso Kyokai NHK, Japan Broadcasting Corp filed Critical Fujitsu Ltd
Priority to JP16166080A priority Critical patent/JPS5784695A/en
Publication of JPS5784695A publication Critical patent/JPS5784695A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0491—Circuits with frequency synthesizers, frequency converters or modulators

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Color Television Systems (AREA)

Abstract

PURPOSE:To achieve highly stable transmission frequency without using high cost and highly stable quartz oscillator, by utilizing a color burst signal of a reception signal. CONSTITUTION:An output of a color burst signal pickup circuit 50 is applied to a frequency divider 54 via the 1st PLL circuit consisting of a phase comparator 51, loop filter 52 and voltage controlled oscillator 53 and frequency divided 63. The frequency-divided output is applied to the 2nd PLL circuit consisting of circuits of 55-58 (the oscillation frequency of a voltage controlled oscillator 57 is 1MHz). The output signal of this PLL circuit is applied to frequency division circuits 59, 65 to output a signal having the frequency in frequency lock to the color burst signal by taking the output of a high order multiplier 61 and a frequency divider 60 by a mixer 62.
JP16166080A 1980-11-17 1980-11-17 Control circuit for transmission frequency Pending JPS5784695A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16166080A JPS5784695A (en) 1980-11-17 1980-11-17 Control circuit for transmission frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16166080A JPS5784695A (en) 1980-11-17 1980-11-17 Control circuit for transmission frequency

Publications (1)

Publication Number Publication Date
JPS5784695A true JPS5784695A (en) 1982-05-27

Family

ID=15739403

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16166080A Pending JPS5784695A (en) 1980-11-17 1980-11-17 Control circuit for transmission frequency

Country Status (1)

Country Link
JP (1) JPS5784695A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6246440B1 (en) 1998-05-14 2001-06-12 Matsushita Electric Industrial Co., Ltd. Circuit for generating a reference signal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52115618A (en) * 1976-03-24 1977-09-28 Mitsubishi Electric Corp Reference signal generator
JPS5313931A (en) * 1976-07-26 1978-02-08 Casio Comput Co Ltd Unsuitable paper information device in recording apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52115618A (en) * 1976-03-24 1977-09-28 Mitsubishi Electric Corp Reference signal generator
JPS5313931A (en) * 1976-07-26 1978-02-08 Casio Comput Co Ltd Unsuitable paper information device in recording apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6246440B1 (en) 1998-05-14 2001-06-12 Matsushita Electric Industrial Co., Ltd. Circuit for generating a reference signal

Similar Documents

Publication Publication Date Title
ES487141A1 (en) Digital phase control circuit with auxiliary circuit.
JPS56158536A (en) Pil oscillation circuit
JPS5784695A (en) Control circuit for transmission frequency
JPS5550191A (en) Electronic timepiece
JPS6436186A (en) Low frequency chrominance signal converter
JPS56110363A (en) Multiplexing circuit using pll
JPS5776930A (en) Frequency shift signal generating system using pll
JPS6412691A (en) Video signal sampling circuit
JPS54154211A (en) Local oscillation circuit
JPS5676640A (en) Receiver of frequency synthesizer system
JPS52127737A (en) Oscillation circuit
GB1495203A (en) Phase locked loop circuits
JPS53148946A (en) Voltage control oscillation circuit
JPS6424632A (en) Phase locked loop circuit
JPS5542050A (en) Electronic watch containing radio receiving function
JPS5732133A (en) Phase-synchronous oscillator
JPS5599886A (en) Frequency modulator
JPS6446319A (en) Phase locked loop circuit
JPS54139317A (en) Am ssb transmitter/receiver
JPS57166740A (en) Phase lock loop frequency synthesizer
JPS56169435A (en) Phase synchronization oscillator
JPS6460021A (en) Phase locked oscillation circuit
BYRNE Automatic frequency control loop including synchronous switching circuits(Automatic frequency control device for providing frequency reference for voltage controlled oscillator)[Patent]
JPS57170619A (en) Pll synthesizer tuner
JPS5745740A (en) Frequency synthesizer