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序号 专利名 申请号 申请日 公开(公告)号 公开(公告)日 发明人
1 JPS518552B1 - JP1905070 1970-03-07 JPS518552B1 1976-03-17
2 JPS5045558A - JP9527073 1973-08-27 JPS5045558A 1975-04-23
3 Etage amplificateur à tube hyperfréquence à large bande et faible dispersivité en fréquence EP91400905.5 1991-04-03 EP0452192A1 1991-10-16 Durand, Alain; Rabot, Olivier

Cet étage amplificateur comprend un tube hyperfréquence dans lequel un faisceau d'électrons (3) interagit avec une onde hyperfréquence de fréquence variable comprise dans une plage utile donnée, la vitesse des électrons du faisceau étant déterminée par une tension de cathode (Vk) appliquée au tube et l'onde hyperfréquence se propageant dans une structure à retard (4) lui imposant une vitesse de phase proche de la vitesse du faisceau d'électrons.

Selon l'invention, la tension de cathode est une tension variable, régulée en fonction de ladite fréquence, cette tension variant avec la fréquence pour modifier la vitesse des électrons du faisceau de manière que, pour toute fréquence de ladite plage de fréquences utile, la vitesse correspondante de ces électrons reste essentiellement, mais non exactement, identique à la vitesse de phase de l'onde hyperfréquence.

De la sorte, on compense la dispersivité en fréquence de la structure à retard et on maintient ainsi essentiellement constante la puissance délivrée en sortie par le tube.

4 JPS6014515U - JP10610883 1983-07-08 JPS6014515U 1985-01-31
5 JPS5999516U - JP20217482 1982-12-23 JPS5999516U 1984-07-05
6 Automatic television gain controller JP9955881 1981-06-25 JPS5744309A 1982-03-12 JIYATSUKU RUDORUFU HAAFUOODO
7 JPS5145932B1 - JP9214369 1969-11-19 JPS5145932B1 1976-12-06
8 JPS4821178B1 - JP7616768 1968-10-21 JPS4821178B1 1973-06-27
9 Etage amplificateur à tube hyperfréquence à large bande et faible dispersivité en fréquence EP91400905.5 1991-04-03 EP0452192B1 1995-02-22 Durand, Alain; Rabot, Olivier
10 METHOD AND APPARATUS FOR AUTOMATIC HIGH POWER TUBE RECOVERY PCT/US2006033856 2006-08-30 WO2008008079A2 2008-01-17 STAGLIANO JAMES J JR; ALFORD JAMES LARRY; HELVIN JAMES ROGERS; NELSON DEAN A; KILLPACK RON A
The invention consists, generally, of a method for automatically reducing power to an electron emitting cathode by sensing an operating condition of the electron emitting cathode, calculating a condition number based upon the operating condition (30), comparing the condition number to a threshold value (62), and reducing the power to the electron emitting cathode when the condition number is greater than the threshold (64). The apparatus and method may be implemented upon a system (10) having a high voltage power source (12), an RF tube (14), a control processor (16), and a signal processor (18).
11 amplifier JP10846391 1991-04-12 JP3179126B2 2001-06-25 アラン、デュラン; オリビエ、ラボ
12 Amplifier JP10846391 1991-04-12 JPH04227307A 1992-08-17 ARAN DEYURAN; ORIBIE RABO
PURPOSE: To provide a microwave tube amplifier which has a wide pass band and an extremely small output fluctuation. CONSTITUTION: An amplifier is incorporated with a microwave tube and an electron beam 3 receives an interaction from microwaves having a variable frequency within a useful range. The speed of the electrons contained in the electron beam 3 varies depending upon a cathode voltage V k applied across the tube and the microwaves are propagated through a delaying structure 4 so that the speed of the microwaves can become a phase speed close to the speed of the electron beam 3. The cathode voltage is a variable voltage which is adjusted as the function of the frequency of the microwave and the value of the voltage changes the velocity of the electrons in the beam 3 so that the velocity of the electrons corresponding to each frequency within the useful range can become nearly equal or unequal to the phase velocity of the microwaves. Thus the frequency dispersibility of the delaying structure 4 is compensated and the output of the microwave tube is substantially maintained at a fixed level. COPYRIGHT: (C)1992,JPO
13 JPS643362B2 - JP9955881 1981-06-25 JPS643362B2 1989-01-20 JATSUKU RUDORUFU HAAFUOODO
14 JPS6128801B2 - JP9562877 1977-08-11 JPS6128801B2 1986-07-02 GIRUBEERU RIORE
In a turbine for a compressible fluid in which the fluid flow leaving the antepenultimate stage is separated into two coaxial flows, the inner flow passes through both the penultimate and the final stages of the turbine while the outer flow passes through the final stage only. This high efficiency arrangement for the last stages of a high power turbine exploits the advantages made available by using titanium as the blade material.
15 Turbine for use in compressible fluid JP9562877 1977-08-11 JPS5322904A 1978-03-02 GIRUBEERU RIORE
In a turbine for a compressible fluid in which the fluid flow leaving the antepenultimate stage is separated into two coaxial flows, the inner flow passes through both the penultimate and the final stages of the turbine while the outer flow passes through the final stage only. This high efficiency arrangement for the last stages of a high power turbine exploits the advantages made available by using titanium as the blade material.
16 JPS4943849Y1 - JP9876269 1969-10-16 JPS4943849Y1 1974-12-02
17 JPS4921589B1 - JP8049567 1967-12-15 JPS4921589B1 1974-06-03
18 Method and apparatus for automatic high power tube recovery US11485010 2006-07-12 US20080012656A1 2008-01-17 James J. Stagliano; James Larry Alford; James Rogers Helvin; Dean A. Nelson; Ron Killpack
The invention consists, generally, of a method for automatically reducing power to an electron emitting cathode by sensing an operating condition of the electron emitting cathode, calculating a condition number based upon the operating condition, comparing the condition number to a threshold value, and reducing the power to the electron emitting cathode when the condition number is greater than the threshold. The apparatus and method may be implemented upon a system having a high voltage power source, an RF tube, a control processor, and a signal processor.
19 Multibit delta-sigma modulator with variable-level quantizer US10699466 2003-10-31 US20050093727A1 2005-05-05 Brian Trotter; Bruce Duewer
A method of operating a delta-sigma modulator by providing a variable-level quantizer, which selectively enables an additional quantizer level(s) during a ramp up sequence of the modulator. The additional quantizer level(s) is/are disabled during normal operation. The quantizer truncates a summer output and selectively enables the additional quantizer levels by clipping the truncated sum within a first range of quantizer levels during the ramp up sequence and within a second range of quantizer levels during normal operation in which there are more quantizer levels in the first range than in the second range. The quantizer preferably enables at least two additional quantizer levels at a low end of the quantizer range. For example, the range of quantizer levels for normal operation of the modulator can be from −6 to +6, while the range of quantizer levels for ramp up operation of the modulator can be from −8 to +7.
20 Simplified floating deck pulse modulator US32635573 1973-01-24 US3806836A 1974-04-23 ALSMEYER R
A floating deck pulse modulator to drive the modulating electrode of a transmitting tube such as a traveling wave tube or klystron in which the modulator includes two vacuum tubes with their circuits connected in series between the positive and negative electrodes of the transmitting tube and the mid point of the two vacuum tube circuits connected to the modulating electrode of the transmitting tube. By supplying the bias for one tube via a zoner diode connected to the second tube a great improvement is achieved over the prior art.
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