JPS57113687A - Frequency synthesizer - Google Patents

Frequency synthesizer

Info

Publication number
JPS57113687A
JPS57113687A JP56000327A JP32781A JPS57113687A JP S57113687 A JPS57113687 A JP S57113687A JP 56000327 A JP56000327 A JP 56000327A JP 32781 A JP32781 A JP 32781A JP S57113687 A JPS57113687 A JP S57113687A
Authority
JP
Japan
Prior art keywords
signal
frequency
circuit
fsc
pll
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
JP56000327A
Other languages
Japanese (ja)
Inventor
Yoji Tanii
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP56000327A priority Critical patent/JPS57113687A/en
Publication of JPS57113687A publication Critical patent/JPS57113687A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/22—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop
    • H03L7/23—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop with pulse counters or frequency dividers

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To achieve frequency synthesis without using BPF, by obtaining the signal of frequency sum between the 1st continuous wave signal synchronized with the 1st synchronizing signal and the 2nd continuous wave signal synchronized with the 2nd synchronizing signal, and picking it up via a PLL circuit. CONSTITUTION:An AFC circuit 8 of phase locked loop PLL constitution locking to a horizontal synchronizing signal (frequency in fH) in a video signal, and an APC circuit 9 locking to a chroma synchronizing signal Bst in the video signal, are provided. In the circuit 8, a low conversion chrominance subcarrier signal f1 and signal in double frequency 2f1 are formed, and in the circuit 9, a chrominance subcarrier signal fSC and a signal in double frequency 2fSC are formed. Based on the frequencies, a signal of synthesized frequency between the frequency f1 and the frequency fSC is generated at a f1+fSC generating circuit 10, the synthesized signal is applied to a PLL circuit, and the output of the PLL circuit is made for the frequency conversion carrier Crr from a voltage controlled oscillation circuit 37.
JP56000327A 1981-01-07 1981-01-07 Frequency synthesizer Pending JPS57113687A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56000327A JPS57113687A (en) 1981-01-07 1981-01-07 Frequency synthesizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56000327A JPS57113687A (en) 1981-01-07 1981-01-07 Frequency synthesizer

Publications (1)

Publication Number Publication Date
JPS57113687A true JPS57113687A (en) 1982-07-15

Family

ID=11470805

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56000327A Pending JPS57113687A (en) 1981-01-07 1981-01-07 Frequency synthesizer

Country Status (1)

Country Link
JP (1) JPS57113687A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60219887A (en) * 1984-04-16 1985-11-02 Matsushita Electric Ind Co Ltd Processor of chrominance signal
JP2003534700A (en) * 2000-05-25 2003-11-18 ブロードバンド・イノベーションズ・インコーポレイテッド Rotation frequency synthesizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60219887A (en) * 1984-04-16 1985-11-02 Matsushita Electric Ind Co Ltd Processor of chrominance signal
JP2003534700A (en) * 2000-05-25 2003-11-18 ブロードバンド・イノベーションズ・インコーポレイテッド Rotation frequency synthesizer

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