Method and circuit for eliminating charge injection from...

Details Method and circuit for eliminating charge injection from... Method and circuit for eliminating charge injection from...

2005-01-18

2005-01-18

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S377000, C327S483000

Reexamination Certificate

active

06844759

ABSTRACT:
A method for reducing charge injection from a field effect transistor switch in a circuit being controlled by a timing signal having an operation cycle with at least a first phase and a second phase. A charge density is changed in at least one layer in a channel in the switch when the timing signal begins its operational cycle and is in the first phase. A depth of the layer is significantly reduced while the timing signal is still in the first phase before a transition of the timing signal from the first phase to the second phase. The timing signal is transitioned from the first phase to the second phase while the layer is significantly reduced.

REFERENCES:
patent: 4885486 (1989-12-01), Shekhawat et al.
patent: 5548288 (1996-08-01), Lueng
patent: 5783952 (1998-07-01), Kazazian
patent: 6133765 (2000-10-01), Hughes
Improved Two-Step Clock-Feedthrough Compensation Technique for Switched-Current Circuits, Markus Helfenstein et al., IEEE Transactions on Circuits and Systems -II:Analog and Digital Signal Processing, vol. 45, No 6, Jun. 1998, pp. 739-743.
New Clock-Feedthrough Compensation Scheme for Switched-Current Circuits, Byung-Moo Min et al., IEEE Transactions on Circuits and Systems-II: Analog and Digital Signal Processing, vol. 45, No 11, Nov. 1998, pp. 1508-1511.

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