Input circuit for receiving a signal at an input on an integrated circuit

A method for setting a termination voltage for an input circuit, comprising:

• providing a termination circuit having a first resistor and a second resistor connected in series between a high voltage potential and a low voltage potential, a first voltage-dependent resistor element connected in parallel with the first resistor, and a second voltage-dependent resistor element having a second resistance gradient connected in parallel with the second resistor;
• and
• controlling the first and second voltage-dependent resistor elements to set the termination voltage which is tapped between the first and second resistors, wherein the first and second voltage-dependent resistor elements are controlled by a control voltage from a control circuit, and wherein the control voltage is determined by comparing a reference voltage against a comparison voltage utilizing a differential amplifier.

A circuit for receiving an input signal on an integrated circuit, comprising:

• a termination circuit means for setting a termination voltage, the termination circuit means comprising a first and a second controllable resistor means for providing a first and a second resistances connected in series between a high voltage potential and a low voltage potential, wherein the termination voltage is tapped from between the first and second controllable resistor means, the termination voltage connected to an input connection pad on the integrated circuit;
• and
• a control circuit means for setting a control voltage utilized to control the first and second controllable resistor means, wherein the control circuit means comprises a voltage generation means for generating a comparison voltage and an amplifier means for comparing a reference voltage against the comparison voltage to determine the control voltage.