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1. 发明专利

FR1364470A 未知
公开(公告)号：FR1364470A
公开(公告)日：1964-06-19
申请号：FR942665
申请日：1963-07-25
申请人： THOMSON HOUSTON COMP FRANCAISE
IPC分类号： H03C1/08 , H03C1/32 , H04N5/74

2. 发明专利

GB756609A Amplifying system for current control 未知
公开(公告)号：GB756609A
公开(公告)日：1956-09-05
申请号：GB1536454
申请日：1954-05-25
申请人： IBM
IPC分类号： H03C1/32 , H04B1/16
摘要： 756,609. Discharge apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. May 25, 1954 [May 28, 1953], No. 15364/54. Class 39 (1). [Also in Groups XXXV and XL (c)] An amplifying system comprises a gaseous discharge tube 1 (e.g. a plasmatron) in which the current flow in a load circuit is varied by modulating the radio-frequency applied across a pair of electrodes 2, 3, thus altering the current flowing between a further pair of electrodes 4, 5 forming the cathode and anode, the two pairs of electrodes having a common plasmafilled gap; condensers 14 and 15 filter the D.C. from the H.F. circuit while chokes 7 and 9 filter H.F. components from the output circuit, so that the control and controlled circuits are effectively decoupled. Electrodes 4 and 5 may be similarly constructed, so as to function alternately as anode and cathode, and a low frequency applied across them, instead of the D.C. source shown. The gas filling may be helium.

3. 发明专利

DE901820C 未知
公开(公告)号：DE901820C
公开(公告)日：1954-01-14
申请号：DEG0004235
申请日：1950-10-03
申请人： SIEMENS AG
发明人： GALPIN CHRISTOPHER JOHN
IPC分类号： H03C1/32

4. 发明专利

GB534946A Improvement in the construction and operation of electron discharge devices 未知
公开(公告)号：GB534946A
公开(公告)日：1941-03-24
申请号：GB2784839
申请日：1939-10-13
申请人： STANDARD TELEPHONES CABLES LTD
IPC分类号： H01J21/18 , H03C1/32
摘要： 534,946. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd. Oct. 13, 1939, No. 27848. Convention date, Nov. 16 1938. Drawings to Specification. [Class 39 (i)] An amplifying valve, especially of the type with the grids &c. formed as coaxial cylinders, is subjected to a magnetic field at right angles to the electron flow for the purpose of regulating or suppressing harmonics of the impressed frequency ; the effect of the field in producing this result is discussed and distinguished from that of similar fields used for other purposes. The field may be applied by means of a winding on an insulating bobbin surrounding a pentode valve of known construction.

5. 发明专利

FR1071964A 未知
公开(公告)号：FR1071964A
公开(公告)日：1954-09-07
申请号：FR1071964D
申请日：1952-12-24
申请人： CSF
IPC分类号： H01J25/44 , H01J25/48 , H03B19/10 , H03C1/32 , H03C5/04 , H03D7/20 , H03G11/00

6. 发明专利

GB602464A Electric space discharge circuits 未知
公开(公告)号：GB602464A
公开(公告)日：1948-05-27
申请号：GB686345
申请日：1945-03-19
申请人： MARCONI WIRELESS TELEGRAPH CO
IPC分类号： H03C1/32
摘要： 602,464. Inductive output tubes ; valve modulation circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 19, 1945, No. 6863. Convention date, March 27, 1940. [Class 40 (v)] [Also in Group XL (a)] An electron discharge device of the inductive output type comprises at least one electrode for accelerating the electron stream past a single tank circuit a source of modulating potential being applied to the positively biassed accelerating electrode to vary simultaneously the transit time qf all electrons in the stream and thereby modulate the angular velocity of the currents induced in the tankcircuit. The device may be used as an oscillator for frequency modulation or as an amplifier with or without regeneration for amplitude and phase modulation respectively. As applied to a F.M. oscillator, Fig. 1, the electron gun comprises an indirectly heated cathode 2, grid 4, accelerator electrodes 5, 5 collector electrode 6 and secondary emission collector 7. The electron beam is focused by magnetic lenses consisting of gaps cd, ef between iron sleeves 14, 15, 16 surrounding the glass envelope 1 and serially arranged with iron strips 17 and a yoke 18 in a magnetic circuit energized by a coil 19. The tank circuit consists of a doughnut shaped copper cavity resonator 12 symmetrically arranged around the glass envelope 1. The output coupling loop 21 thereof is connected to lecher wires 25 tuned at 26 and back coupled, over a line 23 adjustable by trombone sliders 24, to the tuned input circuit 9 to sustain oscillations. Modulation potentials are applied from source 30 to vary the normal positive bias on one or as shown, both accelerator electrodes 5, 5 which are directly connected to each other. The transit time of the electrons which move with substantially constant velocity throughout the length of the stream is correspondingly affected and proportionately varies the phase of the feed-back energy which causes a change in frequency. The phase shift required in the feed-back circuit to produce a given frequency change is kept to a minimum by making the Q of the input circuit 9 and the output coupling loop 21, and the feed-back path as low as possible. The coupling loop 21 may be replaced by any other coupling element(s) suitable for controlling the effective Q of the resonator which may be in the form of a concentric line. Compensator circuits may be necessary where large frequency deviations are required to make the frequency change proportional to the modulating potential and to keep the A.M. present to a minimum. For phase modulation, Fig. 2, the feed-back circuit of Fig. 1 is dispensed with and the H.F. source 32 to be modulated is applied across the grid and cathode of the valve to modulate the density of the electron stream. As in Fig. 1 the modulating potentials from source 30 are applied to the accelerator electrodes 5, 5 to vary the normal positive bias thereon. These potential variations affect the transit time of the electrons in the stream and thus change the phase of the input voltage on grid 4 relative to the induced voltage in the resonator 12. The input voltage phase modulated in accord. ance with the signal voltage from source 30 is taken from coupling loop 21. The Q of resonator 12 is made as low as possible to reduce the amplitude modulation present or a limiter stage may be used to remove the A.M. For amplitude modulation, Fig. 3 (not shown), the circuit of Fig. 2 is provided with a regenerative feed-back path from the coupling loop 21 to the input circuit 2, 4. As before, the modulating voltages applied to the accelerator electrodes vary the transit time of the electrons in the stream. This varies the phase between the grid voltage and that induced in the resonator which in turn causes a corresponding change in the regeneration resulting in A.M. in the output voltage. In order that the coincidental phase modulation present may be a minimum, a high Q is chosen for the resonator. In a modification of the F.M. oscillator of Fig. 1, the accelerator electrode 5 is dispersed with and the accelerator electrode 5, Fig. 4 (not shown), connected to the cavity resonator 12. In such a case if the output is taken off by means of a coaxial line the outer conductor of which is grounded, the resonator is isolated from ground by a condenser of low R.F. impedance and the modulating potentials on the accelerator electrode isolated from the resonator by R.F. chokes or resistors.

7. 发明专利

DE704077C 未知
公开(公告)号：DE704077C
公开(公告)日：1941-10-09
申请号：DET0046682
申请日：1936-04-02
申请人： TELEFUNKEN GMBH
发明人： HOFER DR RUDOLF , GUERTLER DR-ING RUDOLF
IPC分类号： H03C1/32 , H03F1/04 , H03F1/06

8. 发明专利

FI19093A Katodstrålrör med ett elektrodsystem för alstring av ett elektronknippe 未知
公开(公告)号：FI19093A
公开(公告)日：1942-07-17
申请号：FI19093D
申请人： RCA CORP
发明人： SHELBY ROBERT E
IPC分类号： H01J29/02 , H03C1/32

9. 发明专利

FR861690A 未知
公开(公告)号：FR861690A
公开(公告)日：1941-02-14
申请号：FR861690D
申请日：1939-11-15
申请人： MATERIEL TELEPHONIQUE
IPC分类号： H01J21/18 , H03C1/32

10. 发明专利

DE699198C 未知
公开(公告)号：DE699198C
公开(公告)日：1940-11-25
申请号：DET0046693
申请日：1936-04-03
申请人： TELEFUNKEN GMBH
发明人： GUERTLER DR-ING RUDOLF , HOFER DR RUDOLF
IPC分类号： H03C1/32 , H03F1/04 , H03F1/06

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