REFERENCE-VOLTAGE-LESS PSEUDO-DIFFERENTIAL INPUT CIRCUITRY

摘要

System, methods and apparatus are described that facilitate data communications using a single-ended communication link. A method for data communications includes decoupling a direct current component from an alternating current component of a single-ended input signal, biasing the alternating current component with a predetermined bias voltage to obtain a realigned signal, and providing a digital output representative of the input signal by comparing the realigned signal with the predetermined bias voltage. The realigned signal can be compared with the predetermined bias voltage using hysteresis comparison to provide an output signal that switches between logic states compatible with a logic circuit.

主权项

1. A method for data communications, comprising:
decoupling a direct current (DC) component of an input signal received from a single-ended data link from an alternating current (AC) component of the input signal; biasing the AC component with a predetermined bias voltage to obtain a realigned signal; and providing a digital output representative of the input signal by comparing the realigned signal with the predetermined bias voltage.