FR934220A - Amplificateur d'ondes à haute fréquence - Google Patents

Amplificateur d'ondes à haute fréquence

Info

Publication number
FR934220A
FR934220A FR934220DA FR934220A FR 934220 A FR934220 A FR 934220A FR 934220D A FR934220D A FR 934220DA FR 934220 A FR934220 A FR 934220A
Authority
FR
France
Prior art keywords
high frequency
frequency wave
wave amplifier
amplifier
wave
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
Other languages
English (en)
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Application granted granted Critical
Publication of FR934220A publication Critical patent/FR934220A/fr
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/02—Large containers rigid
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0033—In fluidised bed furnaces or apparatus containing a dispersion of the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/24—Slow-wave structures, e.g. delay systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/24—Slow-wave structures, e.g. delay systems
    • H01J23/30—Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/36—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
    • H01J25/38—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the forward travelling wave being utilised
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/54—Amplifiers using transit-time effect in tubes or semiconductor devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Microwave Tubes (AREA)
  • Waveguides (AREA)
  • Microwave Amplifiers (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
FR934220D 1946-01-11 1946-10-07 Amplificateur d'ondes à haute fréquence Expired FR934220A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US640597A US2636948A (en) 1946-01-11 1946-01-11 High-frequency amplifier

Publications (1)

Publication Number Publication Date
FR934220A true FR934220A (fr) 1948-05-14

Family

ID=24568892

Family Applications (1)

Application Number Title Priority Date Filing Date
FR934220D Expired FR934220A (fr) 1946-01-11 1946-10-07 Amplificateur d'ondes à haute fréquence

Country Status (8)

Country Link
US (1) US2636948A (fr)
BE (1) BE469122A (fr)
CH (1) CH269667A (fr)
DE (2) DE970660C (fr)
ES (1) ES176720A1 (fr)
FR (1) FR934220A (fr)
GB (2) GB652219A (fr)
NL (4) NL78190C (fr)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE872224C (de) * 1949-07-12 1953-03-30 Csf Wanderfeldroehre zur UEbertragung von Ultrakurzwellen mit einer Verzoegerungsleitung und einem zwischen den Ein- und Ausgangskreis geschalteten Schlupfraum
DE873567C (de) * 1948-11-19 1953-04-16 Csf Wanderfeld-Wendelroehre, deren Wendel in zwei Abschnitte unterteilt ist
US2669674A (en) * 1948-09-09 1954-02-16 Hartford Nat Bank & Trust Co Traveling wave tube
DE912979C (de) * 1951-05-10 1954-06-08 Western Electric Co Wanderfeld-Begrenzerroehre
US2683238A (en) * 1949-06-17 1954-07-06 Bell Telephone Labor Inc Microwave amplifier
US2691765A (en) * 1952-04-05 1954-10-12 Bell Telephone Labor Inc Electron discharge device
US2716202A (en) * 1950-06-20 1955-08-23 Bell Telephone Labor Inc Microwave amplifier electron discharge device
DE933763C (de) * 1949-02-23 1955-10-06 Siemens Ag Wanderfeldroehre
DE943236C (de) * 1950-11-12 1956-05-17 Elektronik Ges Mit Beschraenkt Laufzeitroehre, insbesondere Wanderfeldroehre
US2750529A (en) * 1952-03-12 1956-06-12 Bell Telephone Labor Inc Electron discharge device
US2779891A (en) * 1951-01-27 1957-01-29 Bell Telephone Labor Inc High frequency amplifier
DE958485C (de) * 1952-05-21 1957-02-21 Telefunken Gmbh Anordnung zum UEbergang von der Wendelleitung einer Lauffeldroehre auf eine durch einen Laengssteg kapazitiv belastete Hohlrohrleitung
US2800602A (en) * 1951-06-05 1957-07-23 Univ Leland Stanford Junior Low noise electron discharge tubes
DE966835C (de) * 1951-04-11 1957-09-12 Western Electric Co Verstaerkeranordnung unter Verwendung einer Wanderfeldroehre
US2824997A (en) * 1949-10-14 1958-02-25 Andrew V Haeff Electron wave tube
DE1026799B (de) * 1953-09-22 1958-03-27 Siemens Ag Laufzeitroehre nach Art einer Wanderfeldroehre mit zwei hintereinandergeschalteten Systemen mit wellenfuehrenden Anordnungen
DE1045482B (de) * 1955-01-25 1958-12-04 Gen Electric Wanderfeldroehrenanordnung mit einer Verzoegerungsleitung, bestehend aus einer Anzahl roehrenfoermiger Leitungselemente, die von stabfoermigen Stuetzen gehaltert werden
US2916710A (en) * 1951-07-16 1959-12-08 Walkinshaw William Loaded wave-guides for linear accelerators
DE973175C (de) * 1949-02-20 1960-01-07 Siemens Ag Wanderfeldroehre mit Antenne
DE974255C (de) * 1954-08-05 1960-11-10 Standard Elek K Lorenz Ag Wanderfeldverstaerkerroehre mit mindestens zwei in Elektronenstrahlrichtung hintereinanderliegenden Wendeln
DE974465C (de) * 1949-02-19 1961-01-05 Siemens Ag Wanderfeldverstaerkerroehre
DE1108335B (de) * 1956-12-04 1961-06-08 Csf Verzoegerungsleitung mit periodischer Struktur fuer Vorwaertswellen-Verstaerkerroehren
US3005126A (en) * 1950-06-15 1961-10-17 Bell Telephone Labor Inc Traveling-wave tubes
DE1271843B (de) * 1955-01-25 1968-07-04 Gen Electric Langgestreckte Laufzeitverstaerkerroehre mit Laufraumresonator
DE1274742B (de) * 1958-10-02 1968-08-08 Hughes Aircraft Co Wanderfeldroehre

Families Citing this family (69)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899596A (en) * 1959-08-11 Wide band mixing system
US3123735A (en) * 1964-03-03 Broadband crossed-field amplifier with slow wave structure
FR957735A (fr) * 1947-01-25 1950-02-24
FR946141A (fr) * 1947-04-21 1949-05-24 Csf Lampe amplificatrice et oscillatrice avec commande par une onde progressive
FR962369A (fr) * 1948-02-10 1950-06-09
US2733305A (en) * 1948-09-30 1956-01-31 Diemer
GB706909A (en) * 1950-07-27 1954-04-07 M O Valve Co Ltd Improvements in or relating to electrical amplifying devices of the travelling wave kind
US2720610A (en) * 1950-07-27 1955-10-11 Kazan Benjamin Noise reducing travelling-wave tube
US2774006A (en) * 1950-10-14 1956-12-11 Univ Leland Stanford Junior Travelling wave tube apparatus
NL159777B (nl) * 1951-02-16 Bbc Brown Boveri & Cie Werkwijze en inrichting voor het vervaardigen van een bekledingslichaam van een verbrandingskamer.
DE944863C (de) * 1951-07-15 1956-07-19 Siemens Ag Daempfungsanordnung fuer eine Elektronenroehre fuer sehr kurze Wellen
BE512833A (fr) * 1951-07-27
US2817037A (en) * 1951-08-04 1957-12-17 Rca Corp Traveling wave electron tubes and circuits
US2760161A (en) * 1951-10-10 1956-08-21 Bell Telephone Labor Inc Traveling wave frequency modulator
DE962189C (de) * 1951-11-20 1957-04-18 Siemens Ag Aus einem wendelfoermig gestalteten Draht od. dgl. bestehender Wellenleiter fuer Wanderfeldroehren oder andere Anordnungen fuer sehr hohe Frequenzen
US2740068A (en) * 1951-12-28 1956-03-27 Bell Telephone Labor Inc Traveling wave electron discharge device
US2848649A (en) * 1952-01-24 1958-08-19 Itt Electromagnetic wave generator
US2850671A (en) * 1952-01-24 1958-09-02 Raytheon Mfg Co Magnetron amplifiers
DE936882C (de) * 1952-03-09 1955-12-22 Telefunken Gmbh Ankopplungsanordnung
FR1053362A (fr) * 1952-04-03 1954-02-02 Csf Perfectionnements aux lignes à retard de structure interdigitale pour tubes à ondes progressives
US2798981A (en) * 1952-08-19 1957-07-09 Itt Traveling wave electron discharge devices
BE523116A (fr) * 1952-04-08 1900-01-01
US2827589A (en) * 1952-05-17 1958-03-18 Bell Telephone Labor Inc Electron discharge device
US2771565A (en) * 1952-08-19 1956-11-20 Itt Traveling wave tubes
US2802135A (en) * 1952-08-22 1957-08-06 Rca Corp Traveling wave electron tube
FR63583E (fr) * 1952-12-13 1955-09-29 Csf Oscillateur à tube à ondes progressives avec propagation de l'énergie électromagnétique en sens inverse du faisceau
NL184862B (nl) * 1953-02-07 Hollis Automation Inc Werkwijze voor het vormen van soldeerverbindingen tussen een op een ketenkaart aangebracht patroon van laagvormige elektrische geleiders en de aansluitgeleiders van op de ketenkaart te bevestigen ketencomponenten en inrichting voor het uitvoeren van de werkwijze.
NL200290A (fr) * 1953-03-26 1900-01-01
US2843791A (en) * 1953-03-30 1958-07-15 Bell Telephone Labor Inc Traveling wave tube
US2806177A (en) * 1953-05-05 1957-09-10 Hughes Aircraft Co Signal delay tube
NL187903B (nl) * 1953-06-05 Mead Corp Inrichting voor het gespatieerd toevoeren van bekervormige houders.
NL187895B (nl) * 1953-06-17 Feldmuehle Ag Inrichting voor het ontinkten van vezelstofsuspensies.
US2842703A (en) * 1953-10-05 1958-07-08 Eitel Mccullough Inc Electron gun for beam-type tubes
US2909704A (en) * 1953-10-09 1959-10-20 Rca Corp Electron gun
US2905859A (en) * 1953-10-27 1959-09-22 Raytheon Co Traveling wave electron discharge devices
NL191722A (fr) * 1953-11-18
DE1051348B (de) * 1953-11-28 1959-02-26 Telefunken Gmbh Anordnung zur Ankopplung einer Wendelleitung an eine uebliche Hochfrequenzleitung
US2833955A (en) * 1954-02-04 1958-05-06 Itt Traveling wave electron discharge devices
US2770755A (en) * 1954-02-05 1956-11-13 Myron L Good Linear accelerator
FR1106301A (fr) * 1954-04-27 1955-12-16 Csf Tube oscillateur à deux faisceaux inversés
US2939045A (en) * 1954-05-12 1960-05-31 Applied Radiation Corp Traveling wave tubes
DE1013367B (de) * 1954-07-16 1957-08-08 Csf Verzoegerungsleitung fuer Wanderfeldroehren
NL200277A (fr) * 1954-09-16
US2994008A (en) * 1954-10-25 1961-07-25 Itt Traveling wave electron discharge device
US2869022A (en) * 1954-11-22 1959-01-13 Hughes Aircraft Co Traveling-wave tube gain control
US2920228A (en) * 1954-12-13 1960-01-05 Univ Leland Stanford Junior Variable output linear accelerator
US3050657A (en) * 1955-01-12 1962-08-21 Gen Electric Slow wave structures
US2943229A (en) * 1955-01-25 1960-06-28 Gen Electric Slow wave structures
US2853642A (en) * 1955-02-23 1958-09-23 Hughes Aircraft Co Traveling-wave tube
US2822502A (en) * 1955-04-05 1958-02-04 Hughes Aircraft Co Slow-wave structure
US2815466A (en) * 1955-04-20 1957-12-03 Hughes Aircraft Co Traveling wave tube
US2842705A (en) * 1955-06-13 1958-07-08 Univ Leland Stanford Junior Particle accelerator
US2941112A (en) * 1955-07-25 1960-06-14 Gen Electric Electric discharge device
US2964669A (en) * 1955-08-25 1960-12-13 Rca Corp Traveling wave tube
US2939993A (en) * 1957-01-07 1960-06-07 Gen Electric Traveling-wave tube attenuators
US2888594A (en) * 1957-04-24 1959-05-26 Bell Telephone Labor Inc Traveling wave tube
US2942141A (en) * 1957-06-06 1960-06-21 Bell Telephone Labor Inc Magnetic structures for traveling wave tubes
US2930927A (en) * 1957-09-30 1960-03-29 Hughes Aircraft Co Traveling-wave tube
US2927832A (en) * 1958-01-06 1960-03-08 Itt Traveling wave electron discharge device
US3007077A (en) * 1958-03-25 1961-10-31 Roger White Electron Devices I Electronic phase shifter for vhf-uhf frequencies
US2985791A (en) * 1958-10-02 1961-05-23 Hughes Aircraft Co Periodically focused severed traveling-wave tube
US3066237A (en) * 1958-12-15 1962-11-27 Hughes Aircraft Co Slow-wave structure
US3010047A (en) * 1959-03-09 1961-11-21 Hughes Aircraft Co Traveling-wave tube
US3205398A (en) * 1960-04-18 1965-09-07 Matthew A Allen Long-slot coupled wave propagating circuit
US3230413A (en) * 1961-02-27 1966-01-18 Varian Associates Coaxial cavity slow wave structure with negative mutual inductive coupling
US3171054A (en) * 1962-08-20 1965-02-23 Hughes Aircraft Co Coupled coaxial cavity travelingwave tube
NL126948C (fr) * 1962-09-03
US3399326A (en) * 1964-09-10 1968-08-27 Philips Corp Travelling wave tube having a graphite coating in the central region and the free end at least 10 wavelengths long and a qc of at least 0.4
FR2630257A1 (fr) * 1988-04-19 1989-10-20 Thomson Csf Tube a onde progressive comportant un dispositif de couplage entre sa ligne a retard et des circuits hyperfrequences externes

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE21739E (en) * 1941-03-04 Space discharge apfarathjs
DE452662C (de) * 1926-06-11 1927-11-18 Lorenz Akt Ges C Schaltungseinrichtung zur Unterdrueckung von Stoerschwingungen
GB321306A (en) * 1928-10-17 1929-11-07 Richard Hindle An improved milling machine attachment
NL40884C (fr) * 1933-10-23
US2064469A (en) * 1933-10-23 1936-12-15 Rca Corp Device for and method of controlling high frequency currents
US2122538A (en) * 1935-01-22 1938-07-05 American Telephone & Telegraph Wave amplifier
US2088749A (en) * 1935-10-30 1937-08-03 Bell Telephone Labor Inc Reception of guided waves
NL49857C (fr) * 1935-11-30
US2197123A (en) * 1937-06-18 1940-04-16 Bell Telephone Labor Inc Guided wave transmission
US2368031A (en) * 1940-03-15 1945-01-23 Bell Telephone Labor Inc Electron discharge device
NL62817C (fr) * 1940-05-04
FR957330A (fr) * 1940-05-17 1950-02-18
US2429243A (en) * 1942-06-18 1947-10-21 Sperry Gyroscope Co Inc High-frequency tube structure

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2669674A (en) * 1948-09-09 1954-02-16 Hartford Nat Bank & Trust Co Traveling wave tube
DE873567C (de) * 1948-11-19 1953-04-16 Csf Wanderfeld-Wendelroehre, deren Wendel in zwei Abschnitte unterteilt ist
DE974465C (de) * 1949-02-19 1961-01-05 Siemens Ag Wanderfeldverstaerkerroehre
DE973175C (de) * 1949-02-20 1960-01-07 Siemens Ag Wanderfeldroehre mit Antenne
DE933763C (de) * 1949-02-23 1955-10-06 Siemens Ag Wanderfeldroehre
US2683238A (en) * 1949-06-17 1954-07-06 Bell Telephone Labor Inc Microwave amplifier
US2794143A (en) * 1949-07-12 1957-05-28 Csf Progressive wave tube comprising an output cavity and a drift space
DE872224C (de) * 1949-07-12 1953-03-30 Csf Wanderfeldroehre zur UEbertragung von Ultrakurzwellen mit einer Verzoegerungsleitung und einem zwischen den Ein- und Ausgangskreis geschalteten Schlupfraum
US2824997A (en) * 1949-10-14 1958-02-25 Andrew V Haeff Electron wave tube
US3005126A (en) * 1950-06-15 1961-10-17 Bell Telephone Labor Inc Traveling-wave tubes
US2716202A (en) * 1950-06-20 1955-08-23 Bell Telephone Labor Inc Microwave amplifier electron discharge device
DE943236C (de) * 1950-11-12 1956-05-17 Elektronik Ges Mit Beschraenkt Laufzeitroehre, insbesondere Wanderfeldroehre
US2779891A (en) * 1951-01-27 1957-01-29 Bell Telephone Labor Inc High frequency amplifier
US2908844A (en) * 1951-04-11 1959-10-13 Bell Telephone Labor Inc Low noise traveling wave tubes
DE966835C (de) * 1951-04-11 1957-09-12 Western Electric Co Verstaerkeranordnung unter Verwendung einer Wanderfeldroehre
DE912979C (de) * 1951-05-10 1954-06-08 Western Electric Co Wanderfeld-Begrenzerroehre
US2800602A (en) * 1951-06-05 1957-07-23 Univ Leland Stanford Junior Low noise electron discharge tubes
US2916710A (en) * 1951-07-16 1959-12-08 Walkinshaw William Loaded wave-guides for linear accelerators
US2750529A (en) * 1952-03-12 1956-06-12 Bell Telephone Labor Inc Electron discharge device
US2691765A (en) * 1952-04-05 1954-10-12 Bell Telephone Labor Inc Electron discharge device
DE958485C (de) * 1952-05-21 1957-02-21 Telefunken Gmbh Anordnung zum UEbergang von der Wendelleitung einer Lauffeldroehre auf eine durch einen Laengssteg kapazitiv belastete Hohlrohrleitung
DE1026799B (de) * 1953-09-22 1958-03-27 Siemens Ag Laufzeitroehre nach Art einer Wanderfeldroehre mit zwei hintereinandergeschalteten Systemen mit wellenfuehrenden Anordnungen
DE974255C (de) * 1954-08-05 1960-11-10 Standard Elek K Lorenz Ag Wanderfeldverstaerkerroehre mit mindestens zwei in Elektronenstrahlrichtung hintereinanderliegenden Wendeln
DE1045482B (de) * 1955-01-25 1958-12-04 Gen Electric Wanderfeldroehrenanordnung mit einer Verzoegerungsleitung, bestehend aus einer Anzahl roehrenfoermiger Leitungselemente, die von stabfoermigen Stuetzen gehaltert werden
DE1271843B (de) * 1955-01-25 1968-07-04 Gen Electric Langgestreckte Laufzeitverstaerkerroehre mit Laufraumresonator
DE1108335B (de) * 1956-12-04 1961-06-08 Csf Verzoegerungsleitung mit periodischer Struktur fuer Vorwaertswellen-Verstaerkerroehren
DE1274742B (de) * 1958-10-02 1968-08-08 Hughes Aircraft Co Wanderfeldroehre

Also Published As

Publication number Publication date
DE974489C (de) 1961-01-12
NL187376B (nl)
NL99549C (fr)
ES176720A1 (es) 1947-03-01
NL76331C (fr)
CH269667A (fr) 1950-07-15
DE970660C (de) 1958-10-16
GB652219A (en) 1951-04-18
BE469122A (fr)
GB652155A (en) 1951-04-18
NL78190C (fr)
US2636948A (en) 1953-04-28

Similar Documents

Publication Publication Date Title
FR934220A (fr) Amplificateur d'ondes à haute fréquence
FR946946A (fr) Appareil d'accord de haute fréquence
FR1018906A (fr) Amplificateurs d'ondes ultra courtes
FR952707A (fr) Appareillage pour l'amplification des oscillations à haute fréquence
FR953840A (fr) Oscillateurs électriques à haute fréquence
FR951364A (fr) Dispositif d'adaptation d'impédance à haute fréquence
FR969267A (fr) Amplificateur à haute fréquence
FR981784A (fr) Amplificateurs d'ondes électriques
FR952475A (fr) Dispositif amplificateur pour haute fréquence
CH270403A (fr) Amplificateur d'ondes électriques à contre-réaction.
FR970337A (fr) Amplificateurs à haute fréquence du type à onde progressive
FR56181E (fr) Perfectionnements aux filtres d'ondes
FR966593A (fr) Oscillateurs à très haute fréquence
FR943455A (fr) Montages convertisseurs d'ondes électriques
FR944384A (fr) Amplificateurs d'ondes électriques à réaction négative
FR57510E (fr) Filtres d'ondes électriques
FR954407A (fr) Perfectionnements aux amplificateurs à haute fréquence
FR57622E (fr) Perfectionnements aux oscillateurs à ondes ultra-courtes
FR938973A (fr) Circuit d'oscillateur à haute fréquence
FR953285A (fr) Montages convertisseurs d'ondes électriques
FR999499A (fr) Amplificateur à haute fréquence
FR922022A (fr) Récepteur d'ondes à super-régénération
FR921141A (fr) Amplificateur d'ondes
FR941392A (fr) Amplificateurs d'ondes électriques
FR937524A (fr) Enregistreur de courbes d'impédance