Patent ID: 8344763

Claim:
A driver circuit comprising: an output transistor circuit that includes a first transistor of a first conductivity type and a second transistor of a second conductivity type disposed between a supply voltage source configured to supply a supply voltage and a reference voltage source configured to supply a reference voltage, wherein the output transistor circuit is configured to output an output signal from a connection node between the first transistor and the second transistor; a first pre-buffer circuit configured to drive a gate of the first transistor in response to an input signal; and a second pre-buffer circuit configured to drive a gate of the second transistor in response to the input signal, wherein the first pre-buffer circuit includes: a third transistor of the first conductivity type and a fourth transistor of the second conductivity type, the third and fourth transistors being configured to receive the input signal and drive the gate of the first transistor; a first current source disposed between the fourth transistor and the reference voltage source; and a fifth transistor of the first conductivity type is diode-coupled between the supply voltage source and the third transistor, and wherein the second pre-buffer circuit includes: a sixth transistor of the first conductivity type and a seventh transistor of the second conductivity type, the sixth and seventh transistors being configured to receive the input signal and drive the gate of the second transistor; a second current source disposed between the sixth transistor and the supply voltage source; and an eighth transistor of the second conductivity type is diode-coupled between the reference voltage source and the seventh transistor.