Accordion-type charge-coupled devices
AssigneeU.S. Philips Corporation
InventorLeonard J. M. Esser
Life of this patent
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Abstract
The invention relates to a charge-coupled device of the accordion type provided with a shift register for supplying accordion clock voltages on the one hand and with clock lines for supplying conventiional clock voltages on the other hand. The electrodes are alternatively coupled to the shift register and to the clock lines. The dissipation can be considerably reduced in this device. Moreover, the transport direction can be reversed in a simple manner, which is of importance, for example, in image sensors for smear suppression.
Claims6
A charge-coupled device comprising a semiconductor body, a charge transport channel defined in said semiconductor body and an electrode system for controlling the transport of charges through the charge transport channel, a shift register by means of which voltages can be applied to the electrode system such that during the storage of charge packets the device is operated as an m-phase device and is operated during transport as an n-phase device (n being larger than m), while a charge packet does not participate in the transport until the preceding charge packet has already been displaced over a given distance, said electrode system comprising a first group of electrodes coupled to said shift register and a second group of electrodes coupled to a common clock signal source, electrodes of said first group and electrodes of said second group being alternately arranged.
Dependencies are inferred from the claim text.