JPS5564426A - Television channel selector - Google Patents

Television channel selector

Info

Publication number
JPS5564426A
JPS5564426A JP13757478A JP13757478A JPS5564426A JP S5564426 A JPS5564426 A JP S5564426A JP 13757478 A JP13757478 A JP 13757478A JP 13757478 A JP13757478 A JP 13757478A JP S5564426 A JPS5564426 A JP S5564426A
Authority
JP
Japan
Prior art keywords
phase lock
lock loop
tuning
loop system
frequency
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
JP13757478A
Other languages
Japanese (ja)
Other versions
JPS592204B2 (en
Inventor
Yoichi Sakamoto
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 JP13757478A priority Critical patent/JPS592204B2/en
Priority to US06/037,332 priority patent/US4271434A/en
Priority to DE19792920180 priority patent/DE2920180A1/en
Priority to CA327,829A priority patent/CA1132272A/en
Priority to GB7917152A priority patent/GB2025172B/en
Publication of JPS5564426A publication Critical patent/JPS5564426A/en
Publication of JPS592204B2 publication Critical patent/JPS592204B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE: To perform tuning operation without digital noises by a phase lock loop system which tunes to the video carrier frequency of a desired reception channel and a tuning system which oscillates at a sound carrier frequency corresponding to the frequency.
CONSTITUTION: Corresponding to the video carrier frequency of a desired reception channel, a phase lock loop system oscillates at a local oscillation frequency. The lock state of the phase lock loop system is detected by PLL/search switch 41 to detect oscillations of the phase lock loop system nearly at a desired local oscillation frequency, thereby changing oscillations ober from the phase lock loop system to a search tuning system. Therefore, no digital noise is generated in a reception state. For tuning to a sound carrier, search tuning is operated in a direction in accordance with the sound carrier on the basis of a locak oscillation frequency equivalent to a video carrier.
COPYRIGHT: (C)1980,JPO&Japio
JP13757478A 1978-05-17 1978-11-07 television channel selection device Expired JPS592204B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP13757478A JPS592204B2 (en) 1978-11-07 1978-11-07 television channel selection device
US06/037,332 US4271434A (en) 1978-05-17 1979-05-09 Channel selector
DE19792920180 DE2920180A1 (en) 1978-05-17 1979-05-16 CHANNEL SELECTION
CA327,829A CA1132272A (en) 1978-05-17 1979-05-17 Channel selector
GB7917152A GB2025172B (en) 1978-05-17 1979-05-17 Channel selector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13757478A JPS592204B2 (en) 1978-11-07 1978-11-07 television channel selection device

Publications (2)

Publication Number Publication Date
JPS5564426A true JPS5564426A (en) 1980-05-15
JPS592204B2 JPS592204B2 (en) 1984-01-17

Family

ID=15201892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13757478A Expired JPS592204B2 (en) 1978-05-17 1978-11-07 television channel selection device

Country Status (1)

Country Link
JP (1) JPS592204B2 (en)

Also Published As

Publication number Publication date
JPS592204B2 (en) 1984-01-17

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