Threshold voltage compensation circuits for low voltage and low power CMOS integrated circuits

摘要

A compensation circuit for transistor threshold voltages in integrated circuits is described. The compensation circuit includes a transistor, current source, and gate reference voltage supply. The transistor is biased to provide a well bias voltage, or backgate voltage V_BG, which is coupled to transistors provided on a common integrated circuit. This compensation circuit eliminates the need for gate biasing capacitors, and provides flexibility in setting threshold voltages in low voltage circuits. The gate reference voltage and current source are established to provide a desired backgate voltage V_BG. Compensation circuits are described for both n-channel and p-channel transistors. A memory device is described which includes compensation circuits for controlling threshold voltages of transistors provided therein.