GB259664A - Improved gain regulator of thermionic amplifiers - Google Patents

Improved gain regulator of thermionic amplifiers

Info

Publication number
GB259664A
GB259664A GB1800025A GB1800025A GB259664A GB 259664 A GB259664 A GB 259664A GB 1800025 A GB1800025 A GB 1800025A GB 1800025 A GB1800025 A GB 1800025A GB 259664 A GB259664 A GB 259664A
Authority
GB
United Kingdom
Prior art keywords
output
detector
amplifier
valve
thermionic
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
GB1800025A
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.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories Inc
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 Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to GB1800025A priority Critical patent/GB259664A/en
Publication of GB259664A publication Critical patent/GB259664A/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

259,664. Western Electric Co., Ltd., (Bell Telephone Laboratories, Inc.). July 14, 1925. Thermionic heterodyne receivers; thermionic amplifiers and detectors.-The output of a thermionic amplifier is regulated so as to obtain a substantially constant signal intensity by rectifying part of the output and impressing a potential derived therefrom so as to control the amplifier. The Figure shows a loop aerial 1 tuned by a condenser 10 connected to high frequency amplifying valves 3, 4 provided with condensers arranged to neutralize coupling between the valve input and output circuits. The output of the valve 4 is applied to the first detector 5 of a, superheterodyne type amplifier comprising a filter 6, intermediate frequency amplifier and detector 7 and a lowfrequency amplifier 8. Part of the output of the amplifier-detector 7 is selected by a circuit 13, 14 tuned to the intermediate frequency and applied to an amplifying valve 15 the output of which is rectified by a valve 16. The output of the detector 16 includes a resistance 18 the potential drop across which depends on the direct current flowing in the space path of the detector 16 and is applied to the grid of one or both the high frequency amplifying valves 4, 5 causing the anode-cathode impedance to vary and tending to maintain the signal at uniform intensity. The auxiliary wave source 2 may be coupled to the detector 5 or to the frame 1 in which case the auxiliary wave is subjected to the control of sensitivity.
GB1800025A 1925-07-14 1925-07-14 Improved gain regulator of thermionic amplifiers Expired GB259664A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1800025A GB259664A (en) 1925-07-14 1925-07-14 Improved gain regulator of thermionic amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1800025A GB259664A (en) 1925-07-14 1925-07-14 Improved gain regulator of thermionic amplifiers

Publications (1)

Publication Number Publication Date
GB259664A true GB259664A (en) 1926-10-14

Family

ID=10104881

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1800025A Expired GB259664A (en) 1925-07-14 1925-07-14 Improved gain regulator of thermionic amplifiers

Country Status (1)

Country Link
GB (1) GB259664A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE933456C (en) * 1929-12-19 1955-09-29 Erna Schoeller Receiver with automatic volume control
FR3024515A1 (en) * 2014-07-29 2016-02-05 Antoine Zalcman DISC TORQUE VARIATOR

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE933456C (en) * 1929-12-19 1955-09-29 Erna Schoeller Receiver with automatic volume control
FR3024515A1 (en) * 2014-07-29 2016-02-05 Antoine Zalcman DISC TORQUE VARIATOR

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