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
GB26146/37A
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.)
BAE Systems Aerospace Inc
Original Assignee
Hazeltine 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 Hazeltine CorpfiledCriticalHazeltine Corp
Publication of GB487641ApublicationCriticalpatent/GB487641A/en
H03G1/00—Details of arrangements for controlling amplification
H03G1/04—Modifications of control circuit to reduce distortion caused by control
Abstract
487,641. Valve circuits for wireless reception. HAZELTINE CORPORATION. Sept. 27, 1937, No. 26146. Convention date, Oct. 14, 1936. [Class 40 (v)] The coupling between two circuits comprises a valve the reactance of which is varied manually or automatically by variation of its transconductance. As shown, the input tuned circuit 19, 21 of the R.F. amplifier 12 of a radio receiver contains a condenser 20 which is common to the aerial circuit which comprises the aerial 11, condenser 23, the input impedance of auxiliary valve 22, condenser 20 and earth 11a. The anode circuit of valve 22 includes a resistance 25 and the anode-control grid circuit, a condenser 24, the effective input capacity being variable manually, for gain control, by a grid bias potentiometer 31, or by variable grid bias derived from an A.V.C. rectifier 29. The coupling may be that between a., frequencychanging stage and an I.F. amplifier, Fig. 2 (not shown).
GB26146/37A1936-10-141937-09-27Improvements in radio receiving systems
ExpiredGB487641A
(en)
Improvements in or relating to circuit-arrangements for rectifying modulated high-or intermediate-frequency oscillations and for amplifying the oscillations obtained after rectification