Differential circuit with current overshoot suppression

Details Differential circuit with current overshoot suppression Differential circuit with current overshoot suppression

2005-03-22

2005-03-22

Tran, Anh Q. (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Output switching noise reduction

C326S027000, C326S022000, C326S023000, C326S126000

Reexamination Certificate

active

06870389

ABSTRACT:
A differential driver circuit that suppresses current overshoot and allows current switching to proceed at near the maximum speed includes: a differential pair Q5and Q6having a tail current source I56; a first buffer Q3providing a first input to the differential pair; a second buffer Q4providing a second input to the differential pair; a first current absorbing device Q7coupled to the tail current source I56and having a control node SP capacitively coupled to the first buffer Q3; and a second current absorbing device Q8coupled to the tail current source I56and having a control node SM capacitively coupled to the second buffer Q4.

REFERENCES:
patent: 4939393 (1990-07-01), Petty
patent: 6483345 (2002-11-01), Whittaker et al.

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