GB414187A - Improvements in and relating to wireless and like receivers - Google Patents

Improvements in and relating to wireless and like receivers

Info

Publication number
GB414187A
GB414187A GB1070533A GB1070533A GB414187A GB 414187 A GB414187 A GB 414187A GB 1070533 A GB1070533 A GB 1070533A GB 1070533 A GB1070533 A GB 1070533A GB 414187 A GB414187 A GB 414187A
Authority
GB
United Kingdom
Prior art keywords
control
rectifier
circuit
detector
signal
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
GB1070533A
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB1070533A priority Critical patent/GB414187A/en
Publication of GB414187A publication Critical patent/GB414187A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/22—Automatic control in amplifiers having discharge tubes

Abstract

414,187. Valve circuits for wireless reception. ELECTRIC & MUSICAL INDUSTRIES, Ltd., Blyth Road, Hayes, Middlesex, and KINROSS, R. I., 74, Palace Gardens Terrace, Kensington, London. April 10, 1933, No. 10705. [Class 40 (v).] The damping of a tuned circuit is varied in accordance with signal strength to effect automatic gain control. As shown, the intermediate frequency tuned circuit 1, 2 feeds an amplifier 4 and second detector 9. A twoelectrode rectifier 17 in series with the portion R2 of a potential divider R2, R3 and the detector cathode resistance R1 is shunted across the circuit 1, 2, the potentials due to R2 and R1 being approximately balanced when no signal is being received. When a signal is applied to the detector the current in resistance R1, falls and the anode of the rectifier 17 becomes positive, current passes therethrough and the circuit 1, 2 is damped to reduce the amplification. By adjustment of resistances R1-R3 the control may be delayed to any extent and the range of control varied. The control may be applied to other tuned circuits or to vary the grid bias of other amplifying valves, control potentials being taken from the terminals a, b connected to the rectifier.
GB1070533A 1933-04-10 1933-04-10 Improvements in and relating to wireless and like receivers Expired GB414187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1070533A GB414187A (en) 1933-04-10 1933-04-10 Improvements in and relating to wireless and like receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1070533A GB414187A (en) 1933-04-10 1933-04-10 Improvements in and relating to wireless and like receivers

Publications (1)

Publication Number Publication Date
GB414187A true GB414187A (en) 1934-08-02

Family

ID=9972756

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1070533A Expired GB414187A (en) 1933-04-10 1933-04-10 Improvements in and relating to wireless and like receivers

Country Status (1)

Country Link
GB (1) GB414187A (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1047268B (en) * 1957-05-04 1958-12-24 Philips Nv Selective amplifier circuit with two transistors and a damping diode
US2894150A (en) * 1953-10-07 1959-07-07 Avco Mfg Corp Transistor signal translating circuit
US2895045A (en) * 1957-09-26 1959-07-14 Avco Mfg Corp Radio receiver with transistorized audio - detector and automatic gain control circuitry
US2923816A (en) * 1956-12-28 1960-02-02 Rca Corp Automatic gain control with variable resistance device in antenna circuit
DE1082307B (en) * 1955-10-21 1960-05-25 Texas Instruments Inc Device for automatic control of the gain of a high-frequency amplifier equipped with at least one transistor
US2945121A (en) * 1956-03-21 1960-07-12 Avco Mfg Corp Radio frequency transistor receivers provided with automatic gain control
DE1103993B (en) * 1955-10-27 1961-04-06 Teletype Corp Crystal-controlled transistor oscillating circuit
US2981835A (en) * 1955-10-21 1961-04-25 Texas Instruments Inc Automatic gain control system
US2996675A (en) * 1958-08-12 1961-08-15 Itt Amplitude comparison circuit
US3014186A (en) * 1956-01-10 1961-12-19 Texas Instruments Inc Tuned transistor amplifier with frequency and bandwidth stabilization
US3022421A (en) * 1957-04-02 1962-02-20 Texas Instruments Inc Automatic gain control system
US3030504A (en) * 1959-05-21 1962-04-17 Daystrom Inc Automatic gain control circuit
US3035170A (en) * 1956-05-15 1962-05-15 Texas Instruments Inc Automatic gain controls for radios
US3133251A (en) * 1961-05-15 1964-05-12 Motorola Inc Overload protector circuit for radio receivers
DE1182311B (en) * 1959-04-25 1964-11-26 Philips Patentverwaltung Amplifier circuit arrangement for amplitude-modulated oscillations
DE1258481B (en) * 1956-04-07 1968-01-11 Philips Nv Radio receiving circuit with regulation
DE1267286B (en) * 1959-03-05 1968-05-02 Philips Nv Receive circuit with gain control
DE1616748B1 (en) * 1961-10-19 1970-03-12 Philips Nv Transistor amplifier for high-frequency oscillations with automatic coupled amplification and bandwidth control

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2894150A (en) * 1953-10-07 1959-07-07 Avco Mfg Corp Transistor signal translating circuit
US2981835A (en) * 1955-10-21 1961-04-25 Texas Instruments Inc Automatic gain control system
DE1082307B (en) * 1955-10-21 1960-05-25 Texas Instruments Inc Device for automatic control of the gain of a high-frequency amplifier equipped with at least one transistor
DE1103993B (en) * 1955-10-27 1961-04-06 Teletype Corp Crystal-controlled transistor oscillating circuit
US3014186A (en) * 1956-01-10 1961-12-19 Texas Instruments Inc Tuned transistor amplifier with frequency and bandwidth stabilization
US2945121A (en) * 1956-03-21 1960-07-12 Avco Mfg Corp Radio frequency transistor receivers provided with automatic gain control
DE1258481B (en) * 1956-04-07 1968-01-11 Philips Nv Radio receiving circuit with regulation
US3035170A (en) * 1956-05-15 1962-05-15 Texas Instruments Inc Automatic gain controls for radios
US2923816A (en) * 1956-12-28 1960-02-02 Rca Corp Automatic gain control with variable resistance device in antenna circuit
US3022421A (en) * 1957-04-02 1962-02-20 Texas Instruments Inc Automatic gain control system
DE1047268B (en) * 1957-05-04 1958-12-24 Philips Nv Selective amplifier circuit with two transistors and a damping diode
US2895045A (en) * 1957-09-26 1959-07-14 Avco Mfg Corp Radio receiver with transistorized audio - detector and automatic gain control circuitry
US2996675A (en) * 1958-08-12 1961-08-15 Itt Amplitude comparison circuit
DE1267286B (en) * 1959-03-05 1968-05-02 Philips Nv Receive circuit with gain control
DE1182311B (en) * 1959-04-25 1964-11-26 Philips Patentverwaltung Amplifier circuit arrangement for amplitude-modulated oscillations
US3030504A (en) * 1959-05-21 1962-04-17 Daystrom Inc Automatic gain control circuit
US3133251A (en) * 1961-05-15 1964-05-12 Motorola Inc Overload protector circuit for radio receivers
DE1616748B1 (en) * 1961-10-19 1970-03-12 Philips Nv Transistor amplifier for high-frequency oscillations with automatic coupled amplification and bandwidth control

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