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公开(公告)号：US3540011A
公开(公告)日：1970-11-10
申请号：US3540011D
申请日：1968-09-06
Applicant: PHILIPS CORP
Inventor： STUPP EDWARD H , CATH PIETER G , SZILAGYI ZSOLT
IPC: G11C11/36 , G11C11/42 , H01L27/146 , H04N5/369
CPC classification number: H01L27/14643 , H04N5/374
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2.发明授权Linearity correction circuit employing fet at input of differential operational amplifier 失效线性校正电路采用不同运算放大器输入的FET
公开(公告)号：US3584233A
公开(公告)日：1971-06-08
申请号：US3584233D
申请日：1968-11-21
Applicant: PHILIPS CORP
Inventor： CATH PIETER G , WILLIAMS ROBIN
CPC classification number: H04N5/202
Abstract: A gamma correction circuit, to compensate for nonlinear video display tube characteristics, is provided with a field effect transistor operating with the gate electrode thereof forward biased to generate a compensation characteristic, an operational amplifier for subtracting the compensation characteristic from the nonlinear tube characteristic, and a load for developing the compensated signal. In a specific embodiment, the compensation characteristic is generated, and the linear portion of the uncorrected signal subtracted therefrom, to develop a correctional curve with zero end-points. The gain of the curve is adjusted by varying the circuit gain, and the linear function reinserted to obtain the desired function.
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公开(公告)号：US3584146A
公开(公告)日：1971-06-08
申请号：US3584146D
申请日：1968-11-21
Applicant: PHILIPS CORP
Inventor： CATH PIETER G , STUPP EDWARD H , RITTNER EDMUND S
CPC classification number: H04N5/217
Abstract: Dark current compensation in a video imaging tube is accomplished by virtue of establishing a dark current level and subtracting it from the video signal. The dark current level can be established by overscanning or scanning a nonexposed area of the image tube or by means of a compensating video sensing segment positioned directly on the actual video sensing segment. In a silicon target tube, the compensating junction can consist of a conveniently sized assembly or mosaiced junctions similar to those of the target, and connected in parallel with the target. The subtraction signal can then be placed in a sample and hold circuit, averaged and subtracted from the actual video signal during a successive scan.
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4.发明授权Angular position measuring device employing optical measurement of critical angle reflection between a reference point and a rotating data point 失效角度位置测量装置在参考点和旋转数据点之间采用关键角度反射的光学测量
公开(公告)号：US3458704A
公开(公告)日：1969-07-29
申请号：US3458704D
申请日：1967-08-03
Applicant: PHILIPS CORP
Inventor： CATH PIETER G
CPC classification number: G01N21/5911 , G01D5/30
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