JPS5578638A - Television picture receiver - Google Patents

Television picture receiver

Info

Publication number
JPS5578638A
JPS5578638A JP15242078A JP15242078A JPS5578638A JP S5578638 A JPS5578638 A JP S5578638A JP 15242078 A JP15242078 A JP 15242078A JP 15242078 A JP15242078 A JP 15242078A JP S5578638 A JPS5578638 A JP S5578638A
Authority
JP
Japan
Prior art keywords
frequency
divider
output
reference oscillator
division ratio
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
JP15242078A
Other languages
Japanese (ja)
Inventor
Toshimitsu Fujimori
Hirosuke Yamamoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15242078A priority Critical patent/JPS5578638A/en
Publication of JPS5578638A publication Critical patent/JPS5578638A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/06—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers

Landscapes

  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To simplify the circuit constitution by making one reference oscillator double the PLL channel selection, the local oscillation and the video detecting oscillation each. CONSTITUTION:The output of reference oscillator 18 is applied to dividers 20 and 19. The division ratio of divider 19 can be varied by the indication given from channel selector 21 to be used the input to mixer 15 for obtaining the necessary IF frequency to the reception channel. While divider 20 features a fixed division ratio with its output frequency matched to the IF frequency. Then the video signal is obtained by having the synchronous detection with the division output. Phase control circuits 22 and 23 control divider 19 in case the transmission frequency gets out of position to keep the frequency at the normal IF frequency.
JP15242078A 1978-12-07 1978-12-07 Television picture receiver Pending JPS5578638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15242078A JPS5578638A (en) 1978-12-07 1978-12-07 Television picture receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15242078A JPS5578638A (en) 1978-12-07 1978-12-07 Television picture receiver

Publications (1)

Publication Number Publication Date
JPS5578638A true JPS5578638A (en) 1980-06-13

Family

ID=15540116

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15242078A Pending JPS5578638A (en) 1978-12-07 1978-12-07 Television picture receiver

Country Status (1)

Country Link
JP (1) JPS5578638A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63139409A (en) * 1986-12-02 1988-06-11 Fujitsu Ltd Fm receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63139409A (en) * 1986-12-02 1988-06-11 Fujitsu Ltd Fm receiver

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