Method and system for achieving and sampling programmable tap we

Details Method and system for achieving and sampling programmable tap we Method and system for achieving and sampling programmable tap we

1974-10-24

1976-03-30

Heyman, John S.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307221D, 307251, 357 24, H03K 518, H01L 2700, H01L 3100, G11C 1900

Patent

active

039477053

ABSTRACT:
The specification discloses a circuit for sampling charge stored adjacent a phase electrode in a charge coupled device and for selectively weighting the sampled charge. The circuit includes a first insulated gate field effect transistor connected at its source to one end of the phase electrode and connected at its drain to receive a clock. A predetermined first voltage is applied to the gate of the first transistor. A second insulated gate field effect transistor is connected to the other end of the phase electrode and is connected at its drain to receive a clock. A preselected second voltage is applied to the gate of the second transistor in order to control the percentage of charging current applied to the phase electrode through the second transistor. The preselected second voltage is equal to or less than the predetermined first voltage in order to maintain the clock voltage of the phase electrode at a predetermined set value. The amount of charging current applied to the phase electrode through each of the first and second transistors is detected in order to provide a weighted indication of the charge stored adjacent the phase electrode. The weighting applied to the sampled charge may be varied by varying the preselected second voltage.

REFERENCES:
patent: 3623132 (1971-11-01), Green
patent: 3858232 (1974-12-01), Boyle et al.
patent: 3868516 (1975-02-01), Buss
patent: 3877056 (1975-04-01), Bailey

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