ES489321A1 - Tuner for television receiver - Google Patents

Tuner for television receiver

Info

Publication number
ES489321A1
ES489321A1 ES489321A ES489321A ES489321A1 ES 489321 A1 ES489321 A1 ES 489321A1 ES 489321 A ES489321 A ES 489321A ES 489321 A ES489321 A ES 489321A ES 489321 A1 ES489321 A1 ES 489321A1
Authority
ES
Spain
Prior art keywords
stage
output
tuner
input
filter
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
ES489321A
Other languages
Spanish (es)
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.)
Blaupunkt Werke GmbH
Original Assignee
Blaupunkt Werke 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 Blaupunkt Werke GmbH filed Critical Blaupunkt Werke GmbH
Publication of ES489321A1 publication Critical patent/ES489321A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
    • H03F3/193—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only with field-effect devices
    • 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

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Noise Elimination (AREA)
  • Filters And Equalizers (AREA)

Abstract

The tuner is for a TV receiver and has a tunable input stage and a tunable bandpass filter, but between the output of the filter and the mixer stage is an amplifier to prevent interfering sidebands from the mixer stage feeding back to input stages. This design enables a wider band pass filter and input stage to be used, together with compatible bandwidth in the mixer stage. The tuner comprises antenna input (1) into the tunable input stage and a dual-gate MOS FEt (T1, 3) followed by the tunable bandpass filter (4). The filter output is fed to the amplifying feedback prevention circuit (5) which may be either a dual-gage MOSFET or a high current unregulated transistor. The output of this stage is commoned with the local oscillator (7) output and fed into a further dual-gate MOSFET stage (T3, 6) on the output of which appears the IF (8). The tuner is primarily intended for the reception of signals in the VHF band.
ES489321A 1979-03-09 1980-03-07 Tuner for television receiver Expired ES489321A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2909319A DE2909319C2 (en) 1979-03-09 1979-03-09 tuner

Publications (1)

Publication Number Publication Date
ES489321A1 true ES489321A1 (en) 1980-08-16

Family

ID=6064968

Family Applications (1)

Application Number Title Priority Date Filing Date
ES489321A Expired ES489321A1 (en) 1979-03-09 1980-03-07 Tuner for television receiver

Country Status (6)

Country Link
JP (1) JPS55138930A (en)
DE (1) DE2909319C2 (en)
ES (1) ES489321A1 (en)
FR (1) FR2451133A1 (en)
IT (1) IT1129731B (en)
ZA (1) ZA801348B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3106997A1 (en) * 1981-02-25 1982-09-09 Blaupunkt-Werke Gmbh, 3200 Hildesheim TUNER FOR TELEVISION RECEIVER
FI67980C (en) * 1983-10-13 1985-06-10 Salora Oy KOPPLING FOER ETT FOER MICROVAOGSFREKVENSER AVSTAEMBART FILTERSAMT FOERVERKLIGANDE AV DENSAMMA
US4662001A (en) * 1985-08-15 1987-04-28 Zenith Electronics Corporation Tunable notch filter for image frequency and conducted local oscillator leakage rejection
US4783849A (en) * 1986-11-26 1988-11-08 Rca Licensing Corporation FET tuner
US5428828A (en) * 1992-08-28 1995-06-27 Thomson Consumer Electronics, Inc. Television receiver tuning circuit
JPH0993091A (en) * 1995-09-25 1997-04-04 Alps Electric Co Ltd Input tuning circuit of television tuner
US5767726A (en) * 1996-10-21 1998-06-16 Lucent Technologies Inc. Four terminal RF mixer device
US20090115525A1 (en) * 2004-10-22 2009-05-07 University Of Florida Research Foundation, Inc. Frequency tunable low noise amplifier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1171032B (en) * 1961-11-13 1964-05-27 Telefunken Patent Arrangement for electronic voting and automatic sharpening
DE2701353A1 (en) * 1977-01-14 1978-08-10 Licentia Gmbh Mixing stage linearity increasing circuit - has voltage dependent capacitors connected to oscillator output and mixer input

Also Published As

Publication number Publication date
FR2451133B3 (en) 1981-10-30
ZA801348B (en) 1981-06-24
IT8020429A0 (en) 1980-03-07
DE2909319A1 (en) 1980-09-11
DE2909319C2 (en) 1982-10-14
IT1129731B (en) 1986-06-11
JPS55138930A (en) 1980-10-30
FR2451133A1 (en) 1980-10-03

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