GB1325840A - Transistor vhf converter - Google Patents

Transistor vhf converter

Info

Publication number
GB1325840A
GB1325840A GB3166572A GB3166572A GB1325840A GB 1325840 A GB1325840 A GB 1325840A GB 3166572 A GB3166572 A GB 3166572A GB 3166572 A GB3166572 A GB 3166572A GB 1325840 A GB1325840 A GB 1325840A
Authority
GB
United Kingdom
Prior art keywords
transistor
reception
circuit
capacitor
diode
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
GB3166572A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1325840A publication Critical patent/GB1325840A/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
    • H03F3/191—Tuned amplifiers
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/72—Indexing scheme relating to amplifiers the amplifier stage being a common gate configuration MOSFET

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

1325840 Radio receiving circuits INTERNATIONAL STANDARD ELECTRIC CORP 6 July 1972 [9 July 1971] 31665/72 Headings H3Q and H3T A V.H.F. converter which can be operated as an I.F. amplifier during U.H.F. reception, comprises an oscillator circuit having an amplifying device, i.e. transistor 5, a switching diode 26 connected to feed, during U.H.F. reception, the I.F. signal to the amplifying device, and a capacitor 25, the converter being so arranged that during use as such the diode remains non-conducting, whereas for U.H.F. reception the diode can be switched on and will connect the capacitor to the oscillator circuit so as to cause oscillation to cease. For V.H.F. reception transistor 5 acts as a self-oscillating mixer, the tuned oscillator circuit 11, 12 being coupled between collector and emitter via capacitors 13, 18. V.H.F. signals are applied to the emitter via tuned circuit 1, 2, while the I.F. output is taken off via inductor 15 which tunes with capacitor 13. In U.H.F. reception a bias voltage is applied to the terminal 28 and renders diode 26 conductive, whereby the I.F. signal from tuned circuit 23, 25, which constitutes the secondary circuit of an I.F. circuit, is applied to the emitter of transistor 5. The presence of capacitor 25, in shunt across the input of transistor 5, inhibits oscillation. A wobbulator for I.F. alignment may be connected to terminal 31.
GB3166572A 1971-07-09 1972-07-06 Transistor vhf converter Expired GB1325840A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712134351 DE2134351C3 (en) 1971-07-09 1971-07-09 Transistor VHF mixer

Publications (1)

Publication Number Publication Date
GB1325840A true GB1325840A (en) 1973-08-08

Family

ID=5813205

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3166572A Expired GB1325840A (en) 1971-07-09 1972-07-06 Transistor vhf converter

Country Status (4)

Country Link
AU (1) AU462618B2 (en)
DE (1) DE2134351C3 (en)
FR (1) FR2145990A5 (en)
GB (1) GB1325840A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51140420A (en) * 1975-05-30 1976-12-03 Hitachi Ltd Self-oscillation mixer circuit
US4189678A (en) * 1977-08-18 1980-02-19 Sanyo Electric Co., Ltd. Combination VHF-UHF tuner for use in a television receiver
FR2542945B1 (en) * 1983-03-18 1985-06-07 Cepe HIGH FREQUENCY BANDPASS AMPLIFIER WITH ADAPTABLE IMPEDANCE AND OSCILLATOR COMPRISING SAME

Also Published As

Publication number Publication date
FR2145990A5 (en) 1973-02-23
DE2134351C3 (en) 1980-02-28
AU4404572A (en) 1974-01-03
AU462618B2 (en) 1975-07-03
DE2134351A1 (en) 1973-01-18
DE2134351B2 (en) 1979-07-19

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee