JPS55161412A - Tuner unit - Google Patents

Tuner unit

Info

Publication number
JPS55161412A
JPS55161412A JP7043079A JP7043079A JPS55161412A JP S55161412 A JPS55161412 A JP S55161412A JP 7043079 A JP7043079 A JP 7043079A JP 7043079 A JP7043079 A JP 7043079A JP S55161412 A JPS55161412 A JP S55161412A
Authority
JP
Japan
Prior art keywords
voltage
tuning
varactor diode
tuner
constitution
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
JP7043079A
Other languages
Japanese (ja)
Inventor
Isao Fujimoto
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP7043079A priority Critical patent/JPS55161412A/en
Priority to CA000352737A priority patent/CA1173176A/en
Priority to US06/154,234 priority patent/US4466126A/en
Priority to GB8018110A priority patent/GB2052198B/en
Priority to DE3021225A priority patent/DE3021225C2/en
Priority to DE19803046718 priority patent/DE3046718A1/en
Publication of JPS55161412A publication Critical patent/JPS55161412A/en
Priority to CA000439343A priority patent/CA1180831A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To make it possible to receive the highest signal of radio signals except broadcast signals to be received by the tuner, by limiting the voltage of a varactor diode which is a tuning element. CONSTITUTION:A Zener diode to limit the tuning voltage to a fixed voltage is provided in line 2 through which the tuning voltage is supplied to tuning varactor diode D of tuner 1. By this constitution, the voltage supplied to varactor diode D is controlled not to be a fixed value or more, and as a result, the upper limit of the receiving frequency is limited.
JP7043079A 1979-06-04 1979-06-04 Tuner unit Pending JPS55161412A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP7043079A JPS55161412A (en) 1979-06-04 1979-06-04 Tuner unit
CA000352737A CA1173176A (en) 1979-06-04 1980-05-27 Tuner apparatus
US06/154,234 US4466126A (en) 1979-06-04 1980-05-29 Tuner apparatus
GB8018110A GB2052198B (en) 1979-06-04 1980-06-03 Voltage variable capacitor tuning
DE3021225A DE3021225C2 (en) 1979-06-04 1980-06-04 Circuit arrangement for a receiving device to limit its tuning range
DE19803046718 DE3046718A1 (en) 1979-06-04 1980-12-11 Synthesiser type tuning voltage generator - uses pulse signal, having width corresponding to frequency, received by voltage converter and low pass filter
CA000439343A CA1180831A (en) 1979-06-04 1983-10-19 Tuner apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7043079A JPS55161412A (en) 1979-06-04 1979-06-04 Tuner unit

Publications (1)

Publication Number Publication Date
JPS55161412A true JPS55161412A (en) 1980-12-16

Family

ID=13431249

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7043079A Pending JPS55161412A (en) 1979-06-04 1979-06-04 Tuner unit

Country Status (1)

Country Link
JP (1) JPS55161412A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4948241A (en) * 1972-04-19 1974-05-10
JPS5014841A (en) * 1973-06-20 1975-02-17
JPS5029101A (en) * 1973-07-17 1975-03-25

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4948241A (en) * 1972-04-19 1974-05-10
JPS5014841A (en) * 1973-06-20 1975-02-17
JPS5029101A (en) * 1973-07-17 1975-03-25

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