GB271915A - Improved system for controlling self-oscillation in radio apparatus - Google Patents

Improved system for controlling self-oscillation in radio apparatus

Info

Publication number
GB271915A
GB271915A GB3101925A GB3101925A GB271915A GB 271915 A GB271915 A GB 271915A GB 3101925 A GB3101925 A GB 3101925A GB 3101925 A GB3101925 A GB 3101925A GB 271915 A GB271915 A GB 271915A
Authority
GB
United Kingdom
Prior art keywords
circuit
resistance
valve
tuned
uni
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
GB3101925A
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.)
Unifrax 1 LLC
Original Assignee
Carborundum Co
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 Carborundum Co filed Critical Carborundum Co
Priority to GB3101925A priority Critical patent/GB271915A/en
Publication of GB271915A publication Critical patent/GB271915A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/22—Circuits for receivers in which no local oscillation is generated

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

271,915. Carborundum Co., Ltd., (Carborundum Co.). Dec. 8, 1925. Thermionic amplifiers and generators. - Selfoscillation in tuned thermionic valve circuits is regulated by a uni-directional electrically-variable resistance element. Fig. 7 shows a wireless receiving-circuit comprising an aerial 23 coupled to the tuned grid circuit of a high-frequency amplifier 27, the plate circuit of which is coupled to a tuned circuit 30, 30<a>. Across this circuit is connected a uni-directional resistance 31 (such as a diode valve, a crystal, or an electrolytic rectifier) in series with a variable source 33 of directcurrent voltage. The damping effect of the resistance 31 varies with the voltage applied by the source 33. The resistance 31 may serve alsoas a detector for the received waves, giving audible signals in the phones 32. Any source of oscillatory energy may replace the aerial as the input to the valve 27. Fig. 8 shows a pair of uni-directional resistances 47, 48 connected in opposite sense across the tuned grid circuit of a back-coupled valve. A variable battery 49, 50 is arranged in series with each resistance. Speci. fications 13636/13, 28413/13, and 172,376 are referred to.
GB3101925A 1925-12-08 1925-12-08 Improved system for controlling self-oscillation in radio apparatus Expired GB271915A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3101925A GB271915A (en) 1925-12-08 1925-12-08 Improved system for controlling self-oscillation in radio apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3101925A GB271915A (en) 1925-12-08 1925-12-08 Improved system for controlling self-oscillation in radio apparatus

Publications (1)

Publication Number Publication Date
GB271915A true GB271915A (en) 1927-06-08

Family

ID=10316696

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3101925A Expired GB271915A (en) 1925-12-08 1925-12-08 Improved system for controlling self-oscillation in radio apparatus

Country Status (1)

Country Link
GB (1) GB271915A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624836A (en) * 1945-08-30 1953-01-06 Robert H Dicke Radio noise transmitter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624836A (en) * 1945-08-30 1953-01-06 Robert H Dicke Radio noise transmitter

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