A DIGITAL VOLTAGE LEVEL SHIFTER

摘要

A digital voltage level shifter for converting an input signal with a low voltage swing to an output signal with a high voltage swing comprises a first inverter stage for generating an inverted signal from an input signal, the inverted signal having a voltage swing between a core voltage and ground, and a second inverter stage for producing an anti-phase signal from the inverted input signal, the anti-phase signal having a voltage swing between the core voltage and ground. The first and second inverters each drive a respective thin gate NMOS transistor connected in cascode with a respective NMOS transistor. The sources of the first and second thin gate NMOS transistors are connected to ground. The gates of the NMOS transistors are connected to the output of the respective inverters through a respective capacitor and are referenced to the core voltage through a respective resistor. The drains of the NMOS transistors are connected to an output circuit to provide an output signal having a voltage higher than the core voltage.