JPS5553918A - Channel selection device - Google Patents

Channel selection device

Info

Publication number
JPS5553918A
JPS5553918A JP12771078A JP12771078A JPS5553918A JP S5553918 A JPS5553918 A JP S5553918A JP 12771078 A JP12771078 A JP 12771078A JP 12771078 A JP12771078 A JP 12771078A JP S5553918 A JPS5553918 A JP S5553918A
Authority
JP
Japan
Prior art keywords
band
selection
channel selection
amplifier
input
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
JP12771078A
Other languages
Japanese (ja)
Inventor
Tetsuo Hori
Hiroshi Sobashima
Tomoyuki Yamaguchi
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.)
Fujitsu General Ltd
Gen Co Ltd
Original Assignee
Fujitsu General Ltd
Gen 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 Fujitsu General Ltd, Gen Co Ltd filed Critical Fujitsu General Ltd
Priority to JP12771078A priority Critical patent/JPS5553918A/en
Publication of JPS5553918A publication Critical patent/JPS5553918A/en
Pending legal-status Critical Current

Links

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE: To ensure the channel selection covering the FM band to the TV and by selecting two electronic tuners with the output of the DC voltage generator.
CONSTITUTION: With selection of channel A through channel selection circuit 1, voltage Va is generated from voltage generator 2 to be applied to DC amplifier 6 and comparator 7 via diode 3 and integrating circuit 5. In this case, optional set value V0 is secured to define the FM band with the level under V0 and the TV band at the level over V0 respectively. Then the input of amplifier 6 is compared at comparator 7, and amplifier 6 features the gain and the shift amount for the FM band when the input is less than V0. At the same time, power change-over circuit 8 supplies the power to FM tuner 9 for selection of the FM band. In the same way, the TV band is selected in case the input is higher than the set value. Thus an automatic switching is secured between the FM and TV bands to carry out the channel selection through selection circuit 1.
COPYRIGHT: (C)1980,JPO&Japio
JP12771078A 1978-10-17 1978-10-17 Channel selection device Pending JPS5553918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12771078A JPS5553918A (en) 1978-10-17 1978-10-17 Channel selection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12771078A JPS5553918A (en) 1978-10-17 1978-10-17 Channel selection device

Publications (1)

Publication Number Publication Date
JPS5553918A true JPS5553918A (en) 1980-04-19

Family

ID=14966786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12771078A Pending JPS5553918A (en) 1978-10-17 1978-10-17 Channel selection device

Country Status (1)

Country Link
JP (1) JPS5553918A (en)

Similar Documents

Publication Publication Date Title
JPS55102932A (en) Electronic tuner
JPS54154922A (en) Television tuner circuit
JPS5553918A (en) Channel selection device
JPS5534507A (en) Electronic tuning television picture receiver
JPS5539443A (en) Converter for catv
JPS5467301A (en) Channel selector
JPS5715522A (en) Channel selector for catv
JPS558106A (en) D-a converting device for channel selector
JPS5438701A (en) Automatic channel selector for electronic tuner
JPS5533353A (en) Channel selection device for receiver
JPS5525279A (en) Automatic frequency tuning defeat device
JPS5568774A (en) Blooming preventing device
JPS55143821A (en) Automatic frequency control unit
JPS57208775A (en) Afc circuit for tv tuner
JPS5310202A (en) Automatic channel selector
JPS554112A (en) Recorder used combining with television receiver
JPS55112026A (en) Control voltage converter
JPS5723334A (en) Tuning circuit equipped with vco
JPS6460087A (en) Signal processing circuit
JPS5563186A (en) Television picture receiver
JPS5396613A (en) Automatic controller for local oscillation frequency
JPS56117419A (en) Channel selector
JPS5737980A (en) Automatic tuning circuit
JPS5418221A (en) Agc circuit formed into integrated circuit
JPS51142216A (en) Bidirectional catv system