GB1115843A - Improvements in or relating to mixer circuits - Google Patents

Improvements in or relating to mixer circuits

Info

Publication number
GB1115843A
GB1115843A GB3496365A GB3496365A GB1115843A GB 1115843 A GB1115843 A GB 1115843A GB 3496365 A GB3496365 A GB 3496365A GB 3496365 A GB3496365 A GB 3496365A GB 1115843 A GB1115843 A GB 1115843A
Authority
GB
United Kingdom
Prior art keywords
mixer
transistor
signals
switch
emitter
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
GB3496365A
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 GB1115843A publication Critical patent/GB1115843A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/28—Continuous tuning of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D9/00—Demodulation or transference of modulation of modulated electromagnetic waves
    • H03D9/06—Transference of modulation using distributed inductance and capacitance
    • H03D9/0658—Transference of modulation using distributed inductance and capacitance by means of semiconductor devices having more than two electrodes
    • H03D9/0666—Transference of modulation using distributed inductance and capacitance by means of semiconductor devices having more than two electrodes using bipolar transistors

Abstract

1,115,843. Radio receivers; transistor mixer and amplifier circuits. TELEFUNKEN PATENTVERWERTUNG G.m.b.H. 16 Aug., 1965 [18 Sept., 1964], No. 34963/65. Headings H3Q and H3T. A mixer valve or transistor 9, for a multiband radio or T.V. receiver, is connected to operate as a self-oscillating mixer in one waveband and is switched to operate as an additive mixer in another waveband. As shown, in the V.H.F. position of switch 13, V.H.F. signals are fed via the V.H.F. radio frequency amplifier 32 to the emitter of transistor 9 together with signals from the V.H.F. oscillator 16 so that additive mixing occurs to produce an I.F. output at 15. In the U.H.F. position of switch 13, an oscillator feedback loop 10 is coupled to the emitter by lead 12 so that transistor 9 acts as a self-oscillating mixer. U.H.F. signals are received via an input filter 25 and a U.H.F. radiofrequency amplifier 26. The output resonant circuit 28, of the amplifier 26, is formed by an inner conductor 27, and is coupled via an aperture 3 in a wall 4 to the inner conductor 5 which forms the input resonant circuit I of the mixer transistor 9. Change from Band I, III, or U.H.F. is effected by switch 23. In another mixer circuit (Fig. 2, not shown), U.H.F. signals are fed to the emitter of a common base connected self-oscillating mixer 9 in one switch position, and in the other switch position V.H.F. signals are fed to the base together with a local oscillator signal and the transistor is connected as a common emitter additive mixer.
GB3496365A 1964-09-18 1965-08-16 Improvements in or relating to mixer circuits Expired GB1115843A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET27032A DE1209153B (en) 1964-09-18 1964-09-18 Channel selector for televisions

Publications (1)

Publication Number Publication Date
GB1115843A true GB1115843A (en) 1968-05-29

Family

ID=7553213

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3496365A Expired GB1115843A (en) 1964-09-18 1965-08-16 Improvements in or relating to mixer circuits

Country Status (2)

Country Link
DE (1) DE1209153B (en)
GB (1) GB1115843A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52124109U (en) * 1976-03-17 1977-09-21
US4633188A (en) * 1984-11-21 1986-12-30 Alps Electric Co., Ltd. Mixer/amplifier circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3458819A (en) * 1966-10-05 1969-07-29 Hazeltine Research Inc Uhf-if or vhf-if converter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52124109U (en) * 1976-03-17 1977-09-21
JPS5548596Y2 (en) * 1976-03-17 1980-11-13
US4633188A (en) * 1984-11-21 1986-12-30 Alps Electric Co., Ltd. Mixer/amplifier circuit

Also Published As

Publication number Publication date
DE1209153B (en) 1966-01-20

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