Output circuit capable of transmitting signal with optimal amplitude and optimal common-mode voltage at receiver circuit

Abstract

An output circuit has a data control circuit, a variable resistance circuit, a common-mode voltage detection circuit, an adjusting circuit. The data control circuit controls data included in an output signal according to an input signal, the variable resistance circuit is connected in series with the data control circuit between a first power supply line and a second power supply line. Further, the common-mode voltage detection circuit detects a common-mode voltage of the output signal, and the adjusting circuit adjusts a resistance of the variable resistance circuit according to an output of the common-mode voltage detection circuit. The common-mode voltage of the output signal is adjusted to equal an optional voltage, and an amplitude of the output signal is adjustable.

Dependencies are inferred from the claim text.