FR2336828A1 - Oscillator frequency range switching circuit - uses disconnection of impedance by diode and creates supply voltage for transistor - Google Patents

Oscillator frequency range switching circuit - uses disconnection of impedance by diode and creates supply voltage for transistor

Info

Publication number
FR2336828A1
FR2336828A1 FR7638923A FR7638923A FR2336828A1 FR 2336828 A1 FR2336828 A1 FR 2336828A1 FR 7638923 A FR7638923 A FR 7638923A FR 7638923 A FR7638923 A FR 7638923A FR 2336828 A1 FR2336828 A1 FR 2336828A1
Authority
FR
France
Prior art keywords
diode
supply voltage
transistor
frequency range
impedance
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
FR7638923A
Other languages
French (fr)
Other versions
FR2336828B1 (en
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of FR2336828A1 publication Critical patent/FR2336828A1/en
Application granted granted Critical
Publication of FR2336828B1 publication Critical patent/FR2336828B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
    • H03J5/244—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

The switching circuit applies supply voltage for an amplifier and/or oscillator. One single diode (9) is a parallel with the impedance (6) for the lower frequency range (eg VHF band I) to be short-circuited for hf. Switching voltage (US) for reception of the lower frequency band (VHF) band I) is applied to the diode (9) cathode and to transistor (4) as supply voltage. In order to receive the higher frequency range (eg VHF band III) switching voltage (US) is applied to the diode (9) anode, and through it as supply voltage for transistor (4).
FR7638923A 1975-12-23 1976-12-23 Oscillator frequency range switching circuit - uses disconnection of impedance by diode and creates supply voltage for transistor Granted FR2336828A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752558121 DE2558121C2 (en) 1975-12-23 1975-12-23 Circuit arrangement for frequency range switching by switching an impedance on and off

Publications (2)

Publication Number Publication Date
FR2336828A1 true FR2336828A1 (en) 1977-07-22
FR2336828B1 FR2336828B1 (en) 1980-07-18

Family

ID=5965350

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7638923A Granted FR2336828A1 (en) 1975-12-23 1976-12-23 Oscillator frequency range switching circuit - uses disconnection of impedance by diode and creates supply voltage for transistor

Country Status (3)

Country Link
DE (1) DE2558121C2 (en)
FR (1) FR2336828A1 (en)
IT (1) IT1065023B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5815218A (en) * 1995-01-04 1998-09-29 Funai Electric., Ltd Circuit device including RF converter, tuner and if amplifier
JP3264811B2 (en) * 1995-11-20 2002-03-11 アルプス電気株式会社 Voltage control variable tuning circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1551681A (en) * 1967-07-13 1968-12-27
FR2160866A1 (en) * 1971-11-26 1973-07-06 Blaupunkt Werke Gmbh
US3813615A (en) * 1972-07-28 1974-05-28 Alps Electric Co Ltd Local oscillator for television tuner having reduced oscillation voltage variation between high and low frequency bands

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1551681A (en) * 1967-07-13 1968-12-27
FR2160866A1 (en) * 1971-11-26 1973-07-06 Blaupunkt Werke Gmbh
US3813615A (en) * 1972-07-28 1974-05-28 Alps Electric Co Ltd Local oscillator for television tuner having reduced oscillation voltage variation between high and low frequency bands

Also Published As

Publication number Publication date
DE2558121C2 (en) 1982-08-26
FR2336828B1 (en) 1980-07-18
DE2558121A1 (en) 1977-06-30
IT1065023B (en) 1985-02-25

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Legal Events

Date Code Title Description
ST Notification of lapse