Interface circuit for bridging voltage domains

Details Interface circuit for bridging voltage domains Interface circuit for bridging voltage domains

2011-08-30

2011-08-30

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C327S333000, C326S080000, C361S056000

Reexamination Certificate

active

08008962

ABSTRACT:
The invention is directed to an interface circuit for bridging voltage domains. The interface circuit receives an input signal, having a larger voltage domain, and safely provides the signal to an electronic device which has a smaller voltage domain. The interface circuit may include a transistor configured as a source follow so that an output of the transistor follows the input of the transistor. A blocking voltage may be provided at the input of the transistor to provide a voltage bias, blocking a range of input voltages to the transistor. The transistor may also have a blocking voltage at a drain terminal of the transistor, to block any output voltage above the blocking voltage.

REFERENCES:
patent: 6313819 (2001-11-01), Maekawa et al.
patent: 7619594 (2009-11-01), Hu
patent: 2007/0188638 (2007-08-01), Nakazawa et al.

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