Patent ID: 6771113
Filing Date: 2004-08-03
Classification: H03K

Abstract:
An apparatus comprising:a first device comprising (i) a first gate configured to receive an input voltage ranging from up to twice a first supply voltage with respect to a second supply voltage to at least said second supply voltage, (ii) a first drain configured to receive said first supply voltage, and (iii) a first source coupled to a first output; a first resistive element having (i) a first side coupled to said first source and (ii) a second side configured to receive said second supply voltage, wherein said apparatus is arranged such that a maximum voltage drop across a gate oxide of said first device does not exceed a difference between said first supply voltage and said second supply voltage and a voltage drop from said first gate to said first output is non-linear as a function of said input voltage; and a multiplexer configured to multiplex said first output and a second output to a third output.