GB953126A - Improvements in or relating to multi-band television tuners - Google Patents

Improvements in or relating to multi-band television tuners

Info

Publication number
GB953126A
GB953126A GB1578561A GB1578561A GB953126A GB 953126 A GB953126 A GB 953126A GB 1578561 A GB1578561 A GB 1578561A GB 1578561 A GB1578561 A GB 1578561A GB 953126 A GB953126 A GB 953126A
Authority
GB
United Kingdom
Prior art keywords
transistor
circuit
local oscillator
oscillator
collector
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
GB1578561A
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.)
DAVID ALBERT JOSEPH POOLE
EK Cole Ltd
Original Assignee
DAVID ALBERT JOSEPH POOLE
EK Cole Ltd
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 DAVID ALBERT JOSEPH POOLE, EK Cole Ltd filed Critical DAVID ALBERT JOSEPH POOLE
Priority to GB1578561A priority Critical patent/GB953126A/en
Publication of GB953126A publication Critical patent/GB953126A/en
Expired legal-status Critical Current

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

Abstract

953,126. Transistor mixer-oscillator circuits. E. K. COLE Ltd., and D. A. J. POOLE. April 26, 1962 [May 2, 1961], No. 15785/61. Heading H3T. In order to prevent interaction between the R.F. and local oscillator circuits and the I.F. circuit in a frequency converter of a multiband television tuner an I.F. suppressor network is connected between the collector of the local-oscillator mixer transistor and the tuning circuit of the local oscillator. As shown, R.F. signals are fed to the emitter of transistor T1 via R.F. band pass circuit L1, L2, C1 and mixed with the oscillations of the local oscillator whose frequency is determined by tank circuit L3, C3, an I.F. output being taken through the I.F. band-pass coil L4. The I.F. suppressor network comprises the parallel combination of inductor L5 and capacitor C6 and is connected between the collector of transistor T1 and the tank circuit L3, C3.
GB1578561A 1961-05-02 1961-05-02 Improvements in or relating to multi-band television tuners Expired GB953126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1578561A GB953126A (en) 1961-05-02 1961-05-02 Improvements in or relating to multi-band television tuners

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1578561A GB953126A (en) 1961-05-02 1961-05-02 Improvements in or relating to multi-band television tuners

Publications (1)

Publication Number Publication Date
GB953126A true GB953126A (en) 1964-03-25

Family

ID=10065424

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1578561A Expired GB953126A (en) 1961-05-02 1961-05-02 Improvements in or relating to multi-band television tuners

Country Status (1)

Country Link
GB (1) GB953126A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2229878A (en) * 1989-02-13 1990-10-03 Murata Manufacturing Co UHF band transistor mixer circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2229878A (en) * 1989-02-13 1990-10-03 Murata Manufacturing Co UHF band transistor mixer circuit
US5043609A (en) * 1989-02-13 1991-08-27 Murata Manufacturing Co., Ltd. UHF band transistor mixer circuit
GB2229878B (en) * 1989-02-13 1992-08-12 Murata Manufacturing Co Uhf band transistor mixer circuit

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