GB1095605A - Improvements in or relating to frequency modulating circuit arrangements - Google Patents

Improvements in or relating to frequency modulating circuit arrangements

Info

Publication number
GB1095605A
GB1095605A GB1417766A GB1417766A GB1095605A GB 1095605 A GB1095605 A GB 1095605A GB 1417766 A GB1417766 A GB 1417766A GB 1417766 A GB1417766 A GB 1417766A GB 1095605 A GB1095605 A GB 1095605A
Authority
GB
United Kingdom
Prior art keywords
branch
capacitors
relating
capacitance
frequency modulating
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.)
Expired
Application number
GB1417766A
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.)
Telefunken Patentverwertungs GmbH
Original Assignee
Telefunken Patentverwertungs 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 Telefunken Patentverwertungs GmbH filed Critical Telefunken Patentverwertungs GmbH
Publication of GB1095605A publication Critical patent/GB1095605A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
    • H03C3/22—Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode

Landscapes

  • Filters And Equalizers (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

1,095,605. Frequency modulation. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. March 30, 1966 [April 24, 1965], No. 14177/66. Heading H3R. A tuned circuit comprises an inductance 1 in parallel with two capacitance branches 3 and 5, each of the capacitance branches comprising an even number of voltage variable capacitors (e.g. diodes), tuning means being connected to terminal 4 for varying the capacitance of all the capacitors 3 in the first branch and half of those in the second branch 5a, and frequency modulating means are connected to terminal 6 for varying the other half of the capacitors 5b in the second branch. The frequency sweep produced by a given modulating voltage remains substantially the same over the whole range of tuning.
GB1417766A 1965-04-24 1966-03-30 Improvements in or relating to frequency modulating circuit arrangements Expired GB1095605A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1965T0028452 DE1265238B (en) 1965-04-24 1965-04-24 Parallel resonant circuit for a frequency modulation device

Publications (1)

Publication Number Publication Date
GB1095605A true GB1095605A (en) 1967-12-20

Family

ID=7554181

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1417766A Expired GB1095605A (en) 1965-04-24 1966-03-30 Improvements in or relating to frequency modulating circuit arrangements

Country Status (2)

Country Link
DE (1) DE1265238B (en)
GB (1) GB1095605A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120886A (en) * 1982-05-24 1983-12-07 Rca Corp A resonant circuit and/or oscillator
GB2408400A (en) * 2003-11-24 2005-05-25 Zarlink Semiconductor Ltd A varactor circuit with a linearised capacitance vs. control voltage characteristic
US7102437B2 (en) 2003-10-01 2006-09-05 Zarlink Semiconductor Limited Integrated circuit device
US7187247B2 (en) 2003-11-24 2007-03-06 Intel Corporation Variable capacitance circuit arrangement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3211803C2 (en) * 1982-03-30 1987-03-12 Siemens AG, 1000 Berlin und 8000 München Electronically tunable or modulable resonance circuit
US4503402A (en) * 1982-08-19 1985-03-05 General Electric Company Voltage controlled oscillator having approximately constant modulation sensitivity

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120886A (en) * 1982-05-24 1983-12-07 Rca Corp A resonant circuit and/or oscillator
US4494081A (en) * 1982-05-24 1985-01-15 Rca Corporation Variable frequency U. H. F. local oscillator for a television receiver
US7102437B2 (en) 2003-10-01 2006-09-05 Zarlink Semiconductor Limited Integrated circuit device
GB2408400A (en) * 2003-11-24 2005-05-25 Zarlink Semiconductor Ltd A varactor circuit with a linearised capacitance vs. control voltage characteristic
GB2408400B (en) * 2003-11-24 2006-05-03 Zarlink Semiconductor Ltd A circuit arrangement
US7187247B2 (en) 2003-11-24 2007-03-06 Intel Corporation Variable capacitance circuit arrangement
US7209016B2 (en) 2003-11-24 2007-04-24 Intel Corporation Variable capacitance circuit arrangement
US7358825B2 (en) 2003-11-24 2008-04-15 Intel Corporation Variable capacitance circuit arrangement
US7358824B2 (en) 2003-11-24 2008-04-15 Intel Corporation Variable capacitance circuit arrangement
US7411469B2 (en) 2003-11-24 2008-08-12 Intel Corporation Circuit arrangement

Also Published As

Publication number Publication date
DE1265238B (en) 1968-04-04

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