FI83006B - Bandavhaengigt inkopplingsbar vhf-blandarkopplingsanordning. - Google Patents

Bandavhaengigt inkopplingsbar vhf-blandarkopplingsanordning. Download PDF

Info

Publication number
FI83006B
FI83006B FI853349A FI853349A FI83006B FI 83006 B FI83006 B FI 83006B FI 853349 A FI853349 A FI 853349A FI 853349 A FI853349 A FI 853349A FI 83006 B FI83006 B FI 83006B
Authority
FI
Finland
Prior art keywords
resistor
mixer
band
frequency
transistor
Prior art date
Application number
FI853349A
Other languages
English (en)
Finnish (fi)
Other versions
FI853349A0 (fi
FI83006C (sv
FI853349L (fi
Inventor
Gerhard Maier
Bertram Fischer
Erich Kirschner
Original Assignee
Thomson Brandt 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 Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Publication of FI853349A0 publication Critical patent/FI853349A0/fi
Publication of FI853349L publication Critical patent/FI853349L/fi
Publication of FI83006B publication Critical patent/FI83006B/fi
Application granted granted Critical
Publication of FI83006C publication Critical patent/FI83006C/sv

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/12—Transference of modulation from one carrier to another, e.g. frequency-changing by means of semiconductor devices having more than two electrodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Error Detection And Correction (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Noise Elimination (AREA)
  • Filters And Equalizers (AREA)
  • Picture Signal Circuits (AREA)

Claims (2)

1. Mixerkoppling för VHF-frekvensband I och III i en television, som är kopplad bandberoende och uppvisar en transistor (1) som styr via ett kollektormotständ (2) ett 30 tväkrets-MF-bandpassfilter (13), varvid kollektorspänningen tillförs till transistorn (1) via bandpassfiltret (13) och motständet (4), kännetecknad av att i kopplingen har lik-strömsförhällanden, som beror pä den bandberoende ändringen hos mixertransistorns (1) operationspunkt, anordnats sälun-35 da, att mellan förbindningspunkten av bandpassfiltret (13) och motständet (4) och basen av transistorn (1) har tillagts ett motständ (3) som tillsammans med transistorns (1) bas-motständ (10) bildar en spänningsdelare som är dimensionerad 7 83006 sä att mixerströmmen är sänkt pä sä sätt att självstörningar blir dämpade i bandet I, medan vld operation i bandet III förändras av koppiingsspänningen för bandet III via en seriekoppling av en diod (6) och ett motständ (5) basnivän 5 av samma transistor (1) sälunda att mixerströmmen väsentli-gen höjes i jäin för el se med mixerströmmen i bandet I.
2. Mixerkoppling enligt patentkravet 1, kännetecknad av att mixerströmmen sänker vid operation i bandet I tili ett 10 värde mellan 0,3 - 0,6 mA.
FI853349A 1984-01-20 1985-08-30 Bandavhängigt inkopplingsbar VHF-blandarkopplingsanordning FI83006C (sv)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3401863 1984-01-20
DE3401863A DE3401863C2 (de) 1984-01-20 1984-01-20 Bandabhängig schaltbare VHF-Mischerschaltungsanordnung
EP8500013 1985-01-16
PCT/EP1985/000013 WO1985003393A1 (fr) 1984-01-20 1985-01-16 Circuit de melange vhf commutable en fonction de la bande

Publications (4)

Publication Number Publication Date
FI853349A0 FI853349A0 (fi) 1985-08-30
FI853349L FI853349L (fi) 1985-08-30
FI83006B true FI83006B (fi) 1991-01-31
FI83006C FI83006C (sv) 1991-05-10

Family

ID=6225434

Family Applications (1)

Application Number Title Priority Date Filing Date
FI853349A FI83006C (sv) 1984-01-20 1985-08-30 Bandavhängigt inkopplingsbar VHF-blandarkopplingsanordning

Country Status (8)

Country Link
US (1) US4731876A (sv)
EP (1) EP0150037B1 (sv)
JP (1) JPH0638566B2 (sv)
AT (1) ATE36100T1 (sv)
DE (2) DE3401863C2 (sv)
DK (1) DK164348C (sv)
FI (1) FI83006C (sv)
WO (1) WO1985003393A1 (sv)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3939740C2 (de) * 1989-12-01 1996-11-28 Telefunken Microelectron Mischstufe
US6147543A (en) * 1996-01-19 2000-11-14 Motorola, Inc. Method and apparatus for selecting from multiple mixers

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL238713A (sv) * 1958-05-01
US3064197A (en) * 1960-09-20 1962-11-13 Collins Radio Co Automatic noise limiter circuit
US3458819A (en) * 1966-10-05 1969-07-29 Hazeltine Research Inc Uhf-if or vhf-if converter
FR2008640A1 (sv) * 1968-05-16 1970-01-23 Rca Corp
JPS5115315A (en) * 1974-07-29 1976-02-06 Hitachi Ltd Vhf terebichuunano kongokairo
ZA764974B (en) * 1975-08-25 1977-07-27 Rca Corp Mixer bias circuit for varactor television tuners
JPS5424513A (en) * 1977-07-27 1979-02-23 Sony Corp Tuner
DE2849178A1 (de) * 1978-11-13 1980-05-29 Philips Patentverwaltung Schaltungsanordnung fuer die anpassungs- und frequenzbereichsumschaltung der frequenzbestimmenden elemente und der verstaerkerelemente in einer abstimmeinrichtung, d.h. sogenanntem tuner, eines fernsehempfaengers
JPS5831122B2 (ja) * 1979-01-19 1983-07-04 仁 伊藤 混合回路
US4361910A (en) * 1981-06-15 1982-11-30 Teller Jr Howard S Ground loop injection VHF tuner

Also Published As

Publication number Publication date
WO1985003393A1 (fr) 1985-08-01
FI853349A0 (fi) 1985-08-30
JPH0638566B2 (ja) 1994-05-18
DE3401863A1 (de) 1985-08-01
DK428385A (da) 1985-09-20
DE3564066D1 (en) 1988-09-01
EP0150037B1 (de) 1988-07-27
DK164348B (da) 1992-06-09
ATE36100T1 (de) 1988-08-15
JPS61500945A (ja) 1986-05-08
FI83006C (sv) 1991-05-10
DK164348C (da) 1992-11-16
EP0150037A2 (de) 1985-07-31
FI853349L (fi) 1985-08-30
DK428385D0 (da) 1985-09-20
EP0150037A3 (en) 1985-08-14
US4731876A (en) 1988-03-15
DE3401863C2 (de) 1986-01-30

Similar Documents

Publication Publication Date Title
US5390345A (en) Method for preventing desensitization and radio interference of radio receivers
US4126828A (en) Intermodulation antiinterference device for superheterodyne receiver
US5073976A (en) Signal-to-noise ratio indicating circuit for fm receivers
JP2011254521A (ja) チューナ
US4761828A (en) Radio receiver
US5483694A (en) Radio receiver with an intermodulation detector
US3072849A (en) Radio receiver having voltage-controlled resonant circuit coupling means between stages
US4580288A (en) Receiver input circuit
JPH09162766A (ja) 衛星放送受信チューナ
US4817198A (en) Radio receiver
FI83006B (fi) Bandavhaengigt inkopplingsbar vhf-blandarkopplingsanordning.
US4792992A (en) Radio receiver
US3243708A (en) Vehicular radio receiver for both amplitude and frequency modulation reception
US3679979A (en) Am, fm, and fm stereo tuner having simplified am to fm switching means
US6791626B2 (en) Input switching circuit for a television tuner immune to interference due to FM broadcasting signal
GB2277650A (en) High frequency amplifier
KR100420092B1 (ko) 라디오수신기
US4556990A (en) Tuner
US4206412A (en) Trap circuit for blocking spurious signals from a T.V. intermediate frequency amplifier
GB2266422A (en) Attenuators
CA1269454A (en) Transistor mixer
KR0177676B1 (ko) 자동이득 제어 지연점 조정회로
US3548090A (en) Signal translating system which rejects a particular frequency
US20090170462A1 (en) Method for Attenuating a High Frequency Emission From a Clocked System
KR960011410B1 (ko) 튜너의 고주파 입력신호 강도 조절회로

Legal Events

Date Code Title Description
MM Patent lapsed
MM Patent lapsed

Owner name: DEUTSCHE THOMSON-BRANDT GMBH