Himax Technologies, Inc.

Lieh-Chiu Lin

Yaw-Guang Chang

Chun-Yu Chiu

An output slew-rate controlled interface is provided. The output slew-rate controlled interface includes: a standard slew-rate range generating circuit, for generating at least one standard signal defining a standard slew-rate range; a slew-rate comparing circuit, coupled to the standard slew-rate range generating circuit and a load circuit coupled to the interface, for comparing a response slew-rate of a response signal from the load circuit with the standard slew-rate range and producing a comparison result; and an outputting circuit, coupled to the slew-rate comparing circuit, for adjusting an output slew-rate of an output signal according to the comparison result and outputting the output signal to the load circuit.

Output slew-rate controlled interface and method for controlling the output slew-rate of an interface

A slew rate control circuit is disclosed. An output impedance buffer and a slew rate buffer are coupled in parallel. An edge detector detects an input signal to accordingly control the output impedance buffer and the slew rate buffer, such that the input signal passes through the slew rate buffer during a rising or falling time period, and the input signal only passes through the output impedance buffer during a stable time period, thereby conforming to specification requirements for the slew rate and the output impedance at the same time.

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Sinshih, Taiwan

Lieh-Chiu Lin