Method and apparatus for driving a plurality of pick-up tubes ha

Details Method and apparatus for driving a plurality of pick-up tubes ha Method and apparatus for driving a plurality of pick-up tubes ha

1988-01-13

1989-08-22

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 29, 358 41, H04N 909, H04N 318, H04N 5228, H04N 973

Patent

active

048600938

ABSTRACT:
The present invention relates to a method and an apparatus for driving image pick-up tubes in, particular, a color television camera or the like having more than one image pick-up tube and in particular to a method and an apparatus for driving image pick-up tubes in which the potentials of the cathode electrodes of the respective image pick-up tubes are set to the same common potential, the potential of the target electrode of at least one of the image pick-up tubes is set substantially to earth potential, target drive potentials are individually applied to the target electrodes of the other image pick-up tubes, and the target potential of each image pick-up tube is set to a value near the earth potential, so that a high S/N ratio is obtained. The driving appartatus can be miniaturized and easily driven. According to the invention, a capacitor, such as a chip capcitor or the like, with a low withstanding voltage can be used in a first-stage amplifier to amplify the video signal from the target electrode. This first-stage amplifier can be arranged near a signal output electrode of the target. Thus, the stray capacitance can be reduced.

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