Patent ID: 9467107
Filing Date: 2016-10-11
CPC Classification: H03F

Claim Text:
1. A source follower circuit, comprising: a first level shifter configured to receive an input voltage; an N-type Metal-Oxide-Semiconductor (NMOS) transistor having a gate terminal coupled to an output of the first level shifter; a second level shifter configured to receive the input voltage; a P-type Metal-Oxide-Semiconductor (PMOS) transistor having a gate terminal coupled to an output of the second level shifter and a source terminal coupled to a source terminal of the NMOS transistor; and an amplifier configured to receive the input voltage and to produce an output current at a node between the source terminal of the NMOS transistor and the source terminal of the PMOS transistor, wherein the output current is determined without switching and based upon a difference between the input voltage and a single reference voltage.