Patent ID: 7157931

Claim:
A termination circuit for a transmission line, the termination circuit comprising: an input node receiving an input signal over the transmission line; an NMOS pull-down transistor coupled between the input node and a first reference voltage wherein the NMOS pull-down transistor is configured to provide an electrical path between the first reference voltage and the input node responsive to the input signal having a first voltage level; and a PMOS pull-up transistor coupled between the input node and a second reference voltage wherein the PMOS pull-up transistor is configured to provide an electrical path between the second reference voltage and the input node responsive to the input signal having a second voltage level, wherein the first reference voltage is less than the second reference voltage and wherein the first voltage level is greater than the second voltage level; wherein the NMOS pull-down transistor maintains the electrical path between the first reference voltage and the input node while the input signal is maintained steady state at the first voltage level; wherein the PMOS pull-up transistor maintains the electrical path between the second reference voltage and the input node while the input signal is maintained steady state at the second voltage level; a first input resistor coupled between the input node and a gate electrode of the NMOS transistor; and a second input resistor coupled between the input node and a gate electrode of the PMOS transistor.