JPS5467301A - Channel selector - Google Patents

Channel selector

Info

Publication number
JPS5467301A
JPS5467301A JP13342477A JP13342477A JPS5467301A JP S5467301 A JPS5467301 A JP S5467301A JP 13342477 A JP13342477 A JP 13342477A JP 13342477 A JP13342477 A JP 13342477A JP S5467301 A JPS5467301 A JP S5467301A
Authority
JP
Japan
Prior art keywords
lpf15
voltage
during
channel
time constant
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
JP13342477A
Other languages
Japanese (ja)
Inventor
Iwao Ayusawa
Tomomitsu Azeyanagi
Michio Masuda
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13342477A priority Critical patent/JPS5467301A/en
Publication of JPS5467301A publication Critical patent/JPS5467301A/en
Pending legal-status Critical Current

Links

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE: To obtain a channel-selection tuning voltage, and to shorten an automatic preset time by making the time constant of a LPF, obtaining a tuning voltage, during channel-selecting operation differ from that during preset operation.
CONSTITUTION: During normal channel-selecting operation, capacitor 31 is interposed between the output terminal of LPF15 and the ground through the operation of switch 30 to increase its time constant, and a mean DC voltage is obtained with the ripple of the input voltage of LPF15 suppressed, thereby supplying a stable tuning voltage to tuner 19. During automatic preset operation, on the other hand, the time constant of LPF15 is decreased through the operation of switch 30 so as to increase the input voltage of LPF15 by a pulse voltage whose pulse width increases continuously with the pulse amplitude constant at the input terminal of LPF15, so that the preset operation can be done in a short time.
COPYRIGHT: (C)1979,JPO&Japio
JP13342477A 1977-11-09 1977-11-09 Channel selector Pending JPS5467301A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13342477A JPS5467301A (en) 1977-11-09 1977-11-09 Channel selector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13342477A JPS5467301A (en) 1977-11-09 1977-11-09 Channel selector

Publications (1)

Publication Number Publication Date
JPS5467301A true JPS5467301A (en) 1979-05-30

Family

ID=15104442

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13342477A Pending JPS5467301A (en) 1977-11-09 1977-11-09 Channel selector

Country Status (1)

Country Link
JP (1) JPS5467301A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188224A (en) * 1983-04-08 1984-10-25 Matsushita Electric Ind Co Ltd Electronic channel selecting circuit
JP2015194690A (en) * 2014-03-21 2015-11-05 日本精機株式会社 Head-up display device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188224A (en) * 1983-04-08 1984-10-25 Matsushita Electric Ind Co Ltd Electronic channel selecting circuit
JPH0225566B2 (en) * 1983-04-08 1990-06-04 Matsushita Electric Ind Co Ltd
JP2015194690A (en) * 2014-03-21 2015-11-05 日本精機株式会社 Head-up display device

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