Image-sensing system with noise eliminator

Details Image-sensing system with noise eliminator Image-sensing system with noise eliminator

1984-10-17

1987-10-06

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Recording apparatus

35821326, H04N 314

Patent

active

046986863

ABSTRACT:
A solid-state image sensor has an electrically floating carrier detecting electrode formed on a substrate, into which the signal carriers are transmitted, a sense amplifier circuit detecting the variation in a voltage of the electrode at the time of transferring the carriers, and a resetting electrode for resetting the potential of the electrode to a predetermined potential at every read-out period of the picture element section. A circuit arrangement for removing noise is provided to have two switches which switch to alternatively become conductive in response to control pulse signals. The first switch becomes conductive during a first period within one picture element period. During the first period the CCD output signal contains an effective image signal component. The second switch becomes conductive during a second period during which the CCD output signal contains a reset noise component, thereby forcibly fixing the level of the reset noise signal to a DC reference potential so that reset noise can be removed.

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IEEE Transactions of Electron Devices, vol. ED-20, No. 6, Jun. 1973, "Interlacing in Charge-Coupled Imaging Devices", pp. 539-554, Carlo H. Sequin.

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