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
GB9796/31A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NVfiledCriticalPhilips Gloeilampenfabrieken NV
Publication of GB358861ApublicationCriticalpatent/GB358861A/en
H03G3/00—Gain control in amplifiers or frequency changers
H03G3/20—Automatic control
H03G3/22—Automatic control in amplifiers having discharge tubes
Landscapes
Circuits Of Receivers In General
(AREA)
Abstract
358,861. Valve amplifying circuits. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. March 31, 1931, No. 9796. Convention date, April 15, 1930. [Class 40 (v).] Automatic volume control in a wireless receiver is obtained by controlling the grid bias of a highfrequency amplifying valve 4 in accordance with the signals by utilizing the bias from the grid of a valve 9 acting as a grid detector through a high resistance 12 or other impedance. The resistance 12 may be of a high value, e.g. 1 to 2 megohms in which case decoupling is effected by means of a relatively small condenser 13.
GB9796/31A1930-04-151931-03-31Improved wireless receiving circuit with automatic volume-control
ExpiredGB358861A
(en)