Patent ID: 6535018
Filing Date: 2003-03-18
Classification: H03K

Abstract:
A level shifter for shifting a logic high voltage of an input signal from a lower voltage to a higher voltage comprising:a latch for storing a bit of data and having an output for driving a stored logic high bit at the higher voltage; a data node coupled to a source of the higher voltage by a current source and an input of the latch; and voltage control circuitry for selectively gating the input signal received at the lower voltage with a bit of data stored in the latch and selectively pulling down a voltage at the data node in response comprising: a first transistor having a current path coupled to the data node and having a gate terminal receiving the input signal; and a second transistor having a current path in series with the first transistor and ground and a gate terminal coupled to an output of the latch, the first and second transistors selectively coupling the data node to ground.