GB869581A - Improvements in or relating to transistor amplifiers - Google Patents

Improvements in or relating to transistor amplifiers

Info

Publication number
GB869581A
GB869581A GB3985258A GB3985258A GB869581A GB 869581 A GB869581 A GB 869581A GB 3985258 A GB3985258 A GB 3985258A GB 3985258 A GB3985258 A GB 3985258A GB 869581 A GB869581 A GB 869581A
Authority
GB
United Kingdom
Prior art keywords
impedance
transistor
stage
emitter
input
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
GB3985258A
Inventor
John Norman Barry
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB3985258A priority Critical patent/GB869581A/en
Publication of GB869581A publication Critical patent/GB869581A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
    • H03K9/02—Demodulating pulses which have been modulated with a continuously-variable signal of amplitude-modulated pulses

Landscapes

  • Amplifiers (AREA)

Abstract

869,581. Transistor amplifiers; pulse modulation circuits. GENERAL ELECTRIC CO. Ltd. Dec. 10, 1959 [Dec. 10, 1958], No. 39852/58. Classes 40(5) and 40(6) [Also in Group XL(b)] A transistor amplifier comprises an emitter follower stage V2 having its input shunted by an impedance 13, the value of the impedance being small compared with the input impedance of the stage, followed by a common emitter stage V3 having an input impedance which is high compared with the output impedance of the emitter follower stage. In order to increase the input impedance of transistor V3, a feedback resistor 18 is included in the emitter circuit and is shunted by a capacitor 19 to provide frequency compensation. A resistor 16 is included in the coupling between V2 and V3 to reduce distortion. The amplifier may be included in a demodulator for amplitude modulated pulses, in which the pulses are applied to a transistor diode 2 and a pulse lengthening circuit comprising a capacitor 3 and resistors 4, 5. A low pass filter 11 (see Group XL(b) ) may also be included. The demodulator forms part of a time division multiplex telephone exchange system.
GB3985258A 1958-12-10 1958-12-10 Improvements in or relating to transistor amplifiers Expired GB869581A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3985258A GB869581A (en) 1958-12-10 1958-12-10 Improvements in or relating to transistor amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3985258A GB869581A (en) 1958-12-10 1958-12-10 Improvements in or relating to transistor amplifiers

Publications (1)

Publication Number Publication Date
GB869581A true GB869581A (en) 1961-05-31

Family

ID=10411839

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3985258A Expired GB869581A (en) 1958-12-10 1958-12-10 Improvements in or relating to transistor amplifiers

Country Status (1)

Country Link
GB (1) GB869581A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284718A (en) * 1962-12-19 1966-11-08 Int Standard Electric Corp Buffer-stage circuit
GB2243964A (en) * 1990-04-06 1991-11-13 Valeo Securite Habitacle Receiver circuit with a temperature compensated demodulating stage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284718A (en) * 1962-12-19 1966-11-08 Int Standard Electric Corp Buffer-stage circuit
GB2243964A (en) * 1990-04-06 1991-11-13 Valeo Securite Habitacle Receiver circuit with a temperature compensated demodulating stage
GB2243964B (en) * 1990-04-06 1993-11-24 Valeo Securite Habitacle A receiver circuit for radio frequency signals for a self-contained electronic device

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