Patent ID: 6429691
Filing Date: 2002-08-06
Classification: H03K

Abstract:
A circuit for providing differential logic signals, comprising:a differential-input circuit having a first differential input and a second differential input; an interface circuit connected to the differential-input circuit for converting a circuit input signal to reduced swing differential logic signals and providing the reduced swing differential logic signals to the first and second differential inputs, the interface circuit comprising: a first unit having a first resistive element connected to a supply voltage and for providing a first voltage to the first differential input via a first node, the first unit further having a second resistive element connected to the first resistive element at the first node for varying the resistance of the first and second resistive elements in response to the circuit input signal; and a second unit which receives the supply voltage for providing a second voltage to the second differential input via a second node, wherein the differential-input circuit outputs a signal in accordance with the first and second voltages.