Voltage level translator circuit with wide supply voltage range

Details Voltage level translator circuit with wide supply voltage range Voltage level translator circuit with wide supply voltage range

2006-01-27

2008-07-08

Barnie, Rexford (Department: 2819)

Electronic digital logic circuitry

Interface

Supply voltage level shifting

C326S063000, C326S081000, C327S333000

Reexamination Certificate

active

07397279

ABSTRACT:
A voltage level translator circuit for translating an input signal referenced to a first voltage supply to an output signal referenced to a second voltage supply includes an input stage for receiving the input signal, the input stage including at least one transistor device having a first threshold voltage associated therewith. The voltage level translator circuit further includes a latch circuit operative to store a signal representative of a logic state of the input signal, the latch circuit including at least one transistor device having a second threshold voltage associated therewith, the second threshold voltage being greater than the first threshold voltage. A voltage clamp circuit is connected between the input stage and the latch circuit. The voltage clamp circuit is operative to limit a voltage across the input stage, an amplitude of the voltage across the input stage being controlled as a function of a voltage difference between the first and second voltage supplies.

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