GB668232A - Improvements in or relating to thermionic valve oscillators and selective amplifiers - Google Patents

Improvements in or relating to thermionic valve oscillators and selective amplifiers

Info

Publication number
GB668232A
GB668232A GB241350A GB241350A GB668232A GB 668232 A GB668232 A GB 668232A GB 241350 A GB241350 A GB 241350A GB 241350 A GB241350 A GB 241350A GB 668232 A GB668232 A GB 668232A
Authority
GB
United Kingdom
Prior art keywords
valve
cathode
grid
feed
resistor
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
GB241350A
Inventor
Percy Samuel Brandon
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB241350A priority Critical patent/GB668232A/en
Publication of GB668232A publication Critical patent/GB668232A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input

Landscapes

  • Amplifiers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

668,232. Valve amplifying and generating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Sept. 4, 1950 [Jan. 30, 1950], No. 2413/60.. Class 40 (vi). In a feed-back amplifier or oscillator employing two or more valves and having a negative feed-back connection from the anode of a second valve to the cathode of the first positive feed-back is applied to a grid further from the cathode than the control grid of the first valve. Negative feed-back is applied from the anode of valve V2 over resistor RF to the cathode resistor RC of valve VI, while positive feedback is applied over path PFB to the outer (i.e. suppressor) grid of valve V1. Variations in the potential of the suppressor grid of valve V1 primarily affects the distribution of cathode current between the screen grid and anode so that the cathode potential does not change appreciably. This allows the use of a large resistor RC in the cathode lead and a correspondingly large resistor RF thereby increasing the gain of the amplifier and thus the gain without feed-back. It is stated that amplifiers are increased in selectivity while oscillators maintain more constant amplitude on larger frequency ranges.
GB241350A 1950-01-30 1950-01-30 Improvements in or relating to thermionic valve oscillators and selective amplifiers Expired GB668232A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB241350A GB668232A (en) 1950-01-30 1950-01-30 Improvements in or relating to thermionic valve oscillators and selective amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB241350A GB668232A (en) 1950-01-30 1950-01-30 Improvements in or relating to thermionic valve oscillators and selective amplifiers

Publications (1)

Publication Number Publication Date
GB668232A true GB668232A (en) 1952-03-12

Family

ID=9739119

Family Applications (1)

Application Number Title Priority Date Filing Date
GB241350A Expired GB668232A (en) 1950-01-30 1950-01-30 Improvements in or relating to thermionic valve oscillators and selective amplifiers

Country Status (1)

Country Link
GB (1) GB668232A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2808472A (en) * 1953-07-10 1957-10-01 Philips Corp Audio frequency amplifier with variable frequency characteristic
US3140449A (en) * 1960-08-22 1964-07-07 E H Lab Inc Electrometer amplifier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2808472A (en) * 1953-07-10 1957-10-01 Philips Corp Audio frequency amplifier with variable frequency characteristic
US3140449A (en) * 1960-08-22 1964-07-07 E H Lab Inc Electrometer amplifier

Similar Documents

Publication Publication Date Title
GB687376A (en) Improvements in or relating to distorting amplifiers for use in television systems
GB668232A (en) Improvements in or relating to thermionic valve oscillators and selective amplifiers
GB677506A (en) Improvements in pulse amplifiers
GB525951A (en) Improvements in or relating to electron discharge device amplifier oscillator and like circuit arrangements for use on very high frequencies
GB672373A (en) Improvements in or relating to thermionic valve circuit arrangements
GB437804A (en) Improvements in or relating to thermionic valves for use in radio signalling systems
GB934475A (en) Adjustable level radio transmitter gain control
GB642796A (en) Improvements in or relating to superheterodyne mixing circuits
GB617630A (en) Improvements in or relating to thermionic valve wave translating circuits
GB716555A (en) Improvements in or relating to thermionic valve amplifiers
GB421476A (en) Improvements in or relating to thermionic valve circuit arrangements
GB741465A (en) Thermionic oscillator circuit
GB678060A (en) Improvements in or relating to thermionic valve phase splitting circuit arrangements
GB528632A (en) Improvements in or relating to thermionic valve amplifiers
GB634088A (en) Improvements in negative feed-back amplifiers
GB638464A (en) Improvements in or relating to positive feed-back circuit-arrangements
GB716543A (en) Improvements in or relating to thermionic valve amplifiers
GB663231A (en) Improvements in or relating to time constant control circuits for radio telephone and similar systems
GB842132A (en) Improvements in or relating to electric amplifier arrangements
GB644402A (en) Electronic valve amplifiers or oscillators
GB695834A (en) Improvements in or relating to automatic frequency control systems
GB635834A (en) Improvements in or relating to feed-back circuit arrangements
GB452790A (en) Improvements in or relating to electron discharge device circuit arrangements
GB648382A (en) Electron discharge tube circuit
GB618252A (en) Improvements in electron discharge tube amplifying or generating circuits