JPS5573184A - Reference signal production circuit for color picture receiver of beam index system - Google Patents

Reference signal production circuit for color picture receiver of beam index system

Info

Publication number
JPS5573184A
JPS5573184A JP14633678A JP14633678A JPS5573184A JP S5573184 A JPS5573184 A JP S5573184A JP 14633678 A JP14633678 A JP 14633678A JP 14633678 A JP14633678 A JP 14633678A JP S5573184 A JPS5573184 A JP S5573184A
Authority
JP
Japan
Prior art keywords
signal
frequency
comparison
reference signal
supplied
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
JP14633678A
Other languages
Japanese (ja)
Other versions
JPS6247396B2 (en
Inventor
Fusao Ishii
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 JP14633678A priority Critical patent/JPS5573184A/en
Publication of JPS5573184A publication Critical patent/JPS5573184A/en
Publication of JPS6247396B2 publication Critical patent/JPS6247396B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE: To increase the response speed of the PLL by giving a phase comparison between the comparison signal and the reference signal of the reference signal production circuit comprised the PLL and then increasing the signal frequency to receive the phase comparison.
CONSTITUTION: For reference signal S0 given from VCO21, reference frequency f0 is given subtraction through counter 26 to 1/n (n: integer), and the output is supplied to 1st mixer 27 along with signal S0 for mixture. This mixture output SM1 is supplied to 2nd mixer 28 along with index signal S1 for mixture, and this mixture output SM2 is supplied to BPF29 for extraction and isolation of comparison signal SM0 equal to frequency f0. Thus comparison signal SM0 featuring the phase error with frequency of f0 is obtained. Accordignly, the control voltage according to the phase error can be obtained through a comparison between signal SM0 and signal S0. In this case, cut-off frequency fc of LPF24 can be selected up to maximum 2nfi. In such way, the response speed can be increased by increasing the signal frequency supplied to pahse comparator 23.
COPYRIGHT: (C)1980,JPO&Japio
JP14633678A 1978-11-27 1978-11-27 Reference signal production circuit for color picture receiver of beam index system Granted JPS5573184A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14633678A JPS5573184A (en) 1978-11-27 1978-11-27 Reference signal production circuit for color picture receiver of beam index system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14633678A JPS5573184A (en) 1978-11-27 1978-11-27 Reference signal production circuit for color picture receiver of beam index system

Publications (2)

Publication Number Publication Date
JPS5573184A true JPS5573184A (en) 1980-06-02
JPS6247396B2 JPS6247396B2 (en) 1987-10-07

Family

ID=15405377

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14633678A Granted JPS5573184A (en) 1978-11-27 1978-11-27 Reference signal production circuit for color picture receiver of beam index system

Country Status (1)

Country Link
JP (1) JPS5573184A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6413816A (en) * 1987-06-26 1989-01-18 Hewlett Packard Yokogawa Signal generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6413816A (en) * 1987-06-26 1989-01-18 Hewlett Packard Yokogawa Signal generator

Also Published As

Publication number Publication date
JPS6247396B2 (en) 1987-10-07

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