GB600188A - Impulse modulating arrangements for radio frequency oscillators - Google Patents

Impulse modulating arrangements for radio frequency oscillators

Info

Publication number
GB600188A
GB600188A GB20749/43A GB2074943A GB600188A GB 600188 A GB600188 A GB 600188A GB 20749/43 A GB20749/43 A GB 20749/43A GB 2074943 A GB2074943 A GB 2074943A GB 600188 A GB600188 A GB 600188A
Authority
GB
United Kingdom
Prior art keywords
generator
circuit
impedance
cathode
grid
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
GB20749/43A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB600188A publication Critical patent/GB600188A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/16—Amplitude modulation by means of discharge device having at least three electrodes
    • H03C1/18—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid
    • H03C1/20—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to anode
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/28—Impedance matching networks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
    • H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
    • H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
    • H03H2/006—Transmitter or amplifier output circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/78—Generating a single train of pulses having a predetermined pattern, e.g. a predetermined number
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/80—Generating trains of sinusoidal oscillations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

600,188. Valve modulating circuits. STANDARD TELEPHONES & CABLES, Ltd. Dec. 10, 1943, No. 20749. Convention date, Jan. 12, 1942. [Class 40 (v)] A circuit for transmitting radio-frequency pulses and for matching the impedance of the pulse source to that of the wave generator makes use of a variable impedance element in the cathode circuit of the wave generator. The pulse source may comprise a pair of parallelconnected valves 10, 11 having coupled coils L1, L2 in their grid and plate circuits and a timing-circuit 12, 13, 14 in its cathode lead. High-voltage pulses created across the coil L2 are synchronized by control voltages applied through condenser 17 to the grids, and are fed to the anode circuit of the push-pull connected carrier generators 19, 20. The anode; grid and cathode circuits of this generator are tuned by balanced line structures 22, 23, 24 and a grid leak 28 of relatively low resistance is provided. The apparent impedance of the generator is adjusted by variation of a resistance or impedance 29 in the cathode circuit of both tubes 19, 20 until the generator impedance matches that of the impulse source, the correct adjustment giving maximum output from the carrier generator. Specification 590,480 is referred to.
GB20749/43A 1942-01-12 1943-12-10 Impulse modulating arrangements for radio frequency oscillators Expired GB600188A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US426455A US2406839A (en) 1942-01-12 1942-01-12 Impedance matching device

Publications (1)

Publication Number Publication Date
GB600188A true GB600188A (en) 1948-04-02

Family

ID=23690874

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20749/43A Expired GB600188A (en) 1942-01-12 1943-12-10 Impulse modulating arrangements for radio frequency oscillators

Country Status (4)

Country Link
US (1) US2406839A (en)
BE (1) BE472158A (en)
FR (1) FR941511A (en)
GB (1) GB600188A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2520174A (en) * 1943-08-05 1950-08-29 John J Slattery Transmitter biasing circuit
US2508751A (en) * 1945-11-10 1950-05-23 Cutler Hammer Inc Oscillator circuit for high-frequency dielectric heating
US2585007A (en) * 1948-01-19 1952-02-12 Edward H Guboff Oscillator circuits for use in diathermy

Also Published As

Publication number Publication date
BE472158A (en)
US2406839A (en) 1946-09-03
FR941511A (en) 1949-01-13

Similar Documents

Publication Publication Date Title
GB497656A (en) Improvements in or relating to electric oscillation generators
GB519897A (en) Improvements in or relating to saw-tooth wave generator circuit arrangements
GB611701A (en) Improvements in or relating to push-pull mixing circuits for ultra short waves
GB367978A (en) Improvements in or relating to methods and means for generating electrical oscillations
GB600188A (en) Impulse modulating arrangements for radio frequency oscillators
GB616843A (en) Improvements in or relating to devices for medical treatment with high-frequency energy
GB490990A (en) Arrangements for modulating high frequency oscillations
US1489158A (en) Arrangement for the audible receiving of undamped oscillations
GB584465A (en) An improved apparatus for varying or modulating the frequency of crystal controlled circuits
GB632788A (en) Improvements in and relating to multi-channel communication transmission with modulated impulses
GB372414A (en) Improvements in or relating to electrical modulation arrangements suitable for use in radio and other high frequency signalling systems
GB380144A (en) Improvements in and relating to thermionic valves and circuits for the generation, modulation and controlling of electric oscillations
GB397007A (en) Improvements in or relating to thermionic valve oscillation generators
GB604582A (en) Directive antenna system and associated thermionic valve generator
GB593101A (en) Improvements in or relating to electric pulse modulating circuits
GB579725A (en) Improvements in or relating to pulse generating thermionic valve apparatus
GB413335A (en) Improvements in or relating to electrical oscillating systems
GB704808A (en) Improvements in or relating to devices for producing calibrating pulses
GB595285A (en) Ultra high frequency communication systems
US1790576A (en) Modulating system
GB584642A (en) Improvements in or relating to arrangements for modulating continuous electric waves
GB620271A (en) Improvements in or relating to mixing circuits
GB563205A (en) Frequency modulator
GB623162A (en) Improvements in or relating to superheterodyne mixing circuits
GB244121A (en)