High voltage level shifting IC with under-ground voltage...

Details High voltage level shifting IC with under-ground voltage... High voltage level shifting IC with under-ground voltage...

2005-11-22

2005-11-22

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C326S080000, C326S081000

Reexamination Certificate

active

06967518

ABSTRACT:
A level shifting circuit provides a reference bias voltage to permit signal transfer between two circuits with different common voltage reference levels. The bias voltage is less than a common voltage reference level for either of the two connected circuits. By providing the bias voltage, the range of variation for the common voltage reference levels between the two circuits is increased when the reference voltages float with respect to each other. The level shifting circuits permit signals to be transferred from a low voltage to a high voltage circuit with increased reliability and noise immunity, and vice versa. The level shifting circuit is particularly useful for driving a half bridge switch configuration, and transmitting a floating current sense signal.

REFERENCES:
patent: 5502412 (1996-03-01), Choi et al.
patent: 6724223 (2004-04-01), Ichiguchi et al.

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