JPS5542430A - Automatic channel selection device - Google Patents

Automatic channel selection device

Info

Publication number
JPS5542430A
JPS5542430A JP11537678A JP11537678A JPS5542430A JP S5542430 A JPS5542430 A JP S5542430A JP 11537678 A JP11537678 A JP 11537678A JP 11537678 A JP11537678 A JP 11537678A JP S5542430 A JPS5542430 A JP S5542430A
Authority
JP
Japan
Prior art keywords
circuit
carrier frequency
counter
detection output
sweep
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
JP11537678A
Other languages
Japanese (ja)
Inventor
Yasunari Ikeda
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 JP11537678A priority Critical patent/JPS5542430A/en
Publication of JPS5542430A publication Critical patent/JPS5542430A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To avoid the malfunction in an assured way by introducing the video detection output to the sweep control circuit, detecting the best signal between the video carrier frequency of the upper channel and the aural carrier frequency of the lower side and then continuing the sweep while the detection output exists.
CONSTITUTION: The clock pulse given from clock pulse generating circuit 12 is supplied to counter 11 via AND circuit 13, and the start/stop of counter 11 is controlled by FF14. Then the counter output receives D-A conversion 16 and is then applied to tuner 1 as the preset voltage. On the other hand, the AFT output given from AFT circuit 17 is sent to formation circuit 18, where the AFT command pulse is formed in accordance with the reception pulse to control counter 11. Then the video detection output is led to sweep control circuit 20 to detect the beat signal between the video carrier frequency of the upper channel and the aural carrier frequency of the lower channel. And the sweep is continued while the detection output exists, thus avoiding the malfunction assuredly.
COPYRIGHT: (C)1980,JPO&Japio
JP11537678A 1978-09-20 1978-09-20 Automatic channel selection device Pending JPS5542430A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11537678A JPS5542430A (en) 1978-09-20 1978-09-20 Automatic channel selection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11537678A JPS5542430A (en) 1978-09-20 1978-09-20 Automatic channel selection device

Publications (1)

Publication Number Publication Date
JPS5542430A true JPS5542430A (en) 1980-03-25

Family

ID=14660986

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11537678A Pending JPS5542430A (en) 1978-09-20 1978-09-20 Automatic channel selection device

Country Status (1)

Country Link
JP (1) JPS5542430A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58521U (en) * 1981-06-26 1983-01-05 クラリオン株式会社 Receiving machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58521U (en) * 1981-06-26 1983-01-05 クラリオン株式会社 Receiving machine

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