Patent ID: 9467146
Filing Date: 2016-10-11
CPC Classification: H03K

Claim Text:
1. An output circuit, adapted for an integrated circuit, comprising: a driver, electrically connected to two output nodes outside the integrated circuit to output signals; a pre-driver, configured to control the driver, comprising a load and an input transistor that are connected in series, wherein between the load and the input transistor is a connection node for controlling the driver; and a buffer circuit, configured to control the load and the input transistor according to an internal signal, and to pre charge the connection node through the load before turning off the input transistor, wherein the load and the input transistor are a first load and a first input transistor, respectively, the pre-driver further comprises a second load and a second input transistor that are connected in series, the buffer circuit turns on the second input transistor when turning off the first input transistor and increase impedance of the second load when pre charging the connection node.