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71. 发明专利

IT9048177A1 EQUALIZZATORE DI GUADAGNO A PENDENZA VARIABILE PER CIRCUITO INTEGRATO MONOLITICO A MICROONDE CON TRANSISTORE FET 未知
公开(公告)号：IT9048177A1
公开(公告)日：1992-01-27
申请号：IT4817790
申请日：1990-07-27
申请人： TELEDYNE IND INC SOCIETA DELLA CALIFORNI
发明人： MORLEY BRUCE C , SUN HORNG JYE
IPC分类号： H03F1/32 , H03G20060101 , H03H11/04 , H03H11/24 , H03H11/54

72. 发明专利

IT9021017A1 CIRCUITO DI ALIMENTAZIONE DI POTENZA CON RIVELAZIONE DI SOVRACORRENTE 未知
公开(公告)号：IT9021017A1
公开(公告)日：1992-01-23
申请号：IT2101790
申请日：1990-07-23
申请人： INT RECTIFIER CORP
发明人： FISHBEIN JEFF
IPC分类号： H02J3/00 , H02H3/087 , H02H7/08 , H02H7/122 , H03G20060101

73. 发明专利

AU614432B2 A METHOD OF CALIBRATING AND EQUALIZING A MULTI-CHANNEL AUTOMATIC GAIN CONTROL AMPLIFIER 未知
公开(公告)号：AU614432B2
公开(公告)日：1991-08-29
申请号：AU4291889
申请日：1989-10-16
申请人： HUGHES AIRCRAFT CO
发明人： YANG STEVE S
IPC分类号： H03F1/30 , G01S20060101 , G01S7/34 , G01S7/40 , G01S13/44 , H03G20060101 , H03G1/04 , H03G3/00 , H03G3/10 , H03G3/30
摘要： A plurality of amplifier channels, wherein each channel is automatically gain controlled by a gain control signal and wherein the gain of each channel is a known function of a plurality of constants of corresponding to each amplifier and of the gain control signal, can be calibrated by the following method. The method comprising the steps of measuring each output of each amplifier at a corresponding plurality of gain control values and at a corresponding input to each amplifier. The number of the plurality of the constants equals the number of the plurality of the gain control values. The method continues by computing the gain of each amplifier at the step of measuring. The constants corresponding to each amplifier are then computed according to the function and computed gain. A corresponding changed gain control signal is applied to each amplifier according to the function to set the corresponding gain of each amplifier to a corresponding predetermined calibrated value. By virtue of this methodology, the gain of each channel of a multiple channel amplifier can be not only calibrated to equal a preset value, but the gains of each of the channels can be matched, all without the use of any other additional test equipment.

75. 发明专利

PL272139A1 LINEARIZATION AMPLIFIER OF RESISTANCE SENSING ELEMENTS 未知
公开(公告)号：PL272139A1
公开(公告)日：1989-10-30
申请号：PL27213988
申请日：1988-04-27
申请人： ROKOSZ JERZY , PIECHOWSKI LESZEK
发明人： ROKOSZ JERZY , PIECHOWSKI LESZEK
IPC分类号： G01D20060101 , G01K20060101 , G01L20060101 , H03G20060101 , G01L , G01D , G01K , H03G

76. 发明专利

PL147736B1 ANALOG LIGHT-PIPE TYPE RECEIVING HEAD 未知
公开(公告)号：PL147736B1
公开(公告)日：1989-07-31
申请号：PL25536585
申请日：1985-09-12
IPC分类号： G02F2/00 , G08C19/36 , H03F20060101 , H03G20060101 , H04B20060101 , H04B9/00

77. 发明专利

PL146556B1 CIRCUITRY FOR AUTOMATICALLY ADJUSTING TEST SIGNALS 未知
公开(公告)号：PL146556B1
公开(公告)日：1989-02-28
申请号：PL25059184
申请日：1984-11-26
IPC分类号： G01R20060101 , G01R15/08 , G01R31/28 , H03G20060101 , H03G3/20

78. 发明专利

AU577476B2 RF INPUT DRIVE SATURATION CONTROL LOOP 未知
公开(公告)号：AU577476B2
公开(公告)日：1988-09-22
申请号：AU6122886
申请日：1986-05-23
申请人： HUGHES AIRCRAFT CO
发明人： MOLLETT LARRY R , GOCZALK ROBERT W
IPC分类号： H03G3/20 , H03F3/58 , H03G20060101
摘要： A system for optimizing the RF input drive to a TWT amplifier (50) over a frequency band of interest. The system includes a microprocessor-based controller (50), and RF detector (40) for detecting the TWT output, and a variable attenuator (20) for adjusting the input drive to the TWT. The controller (50) comprises an analog-to-digital converter (54) for converting the video detector signals and providing digital RF level signals which are representative of the TWT output power level. Frequency data is also provided to the controller indicating the frequency of the RF exciter signals driving the TWT. The controller (50) is, therefore, provided with frequency and RF level information, and is adapted to control the attenuator (20) to adjust the TWT input drive for optimum TWT output. The system is operable in a calibration mode wherein the controller (50) follows a calibration algorithm to determine the optimum attenuator (20) setting, resulting in the maximum RF output, for each frequency of interest. The optimum attenuator setting is stored in an EEPROM (62) for each drive frequency. The system i s further operable in a normal mode wherein the controller (50) sets the attenuator (20) at the predetermined optimum setting for the present exciter frequency.

79. 发明专利

PL143853B1 CIRCUIT FOR GENERATION OF SIGNAL REFERENCE LEVEL IN AN ELECTRONIC EQUIPMENT 未知
公开(公告)号：PL143853B1
公开(公告)日：1988-03-31
申请号：PL24537383
申请日：1983-12-27
IPC分类号： G01N20060101 , G01R1/28 , G01R17/02 , H01J20060101 , H03G20060101 , H03G3/30

80. 发明专利

PL257611A1 OVERLOAD CIRCUIT-BREAKER FOR LOW FREQUENCY AMPLIFIERS 未知
公开(公告)号：PL257611A1
公开(公告)日：1987-10-19
申请号：PL25761186
申请日：1986-01-22
申请人： ZAKLADY MEKH PRECYZYJNEJ UNITR
发明人： FRYDRYCHOWICZ PAWEL , LUBINSKI MAREK
IPC分类号： H02H20060101 , H03G20060101 , H03G , H02H

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