公开(公告)号：US11264963B1

公开(公告)日：2022-03-01

申请号：US16993292

申请日：2020-08-14

Applicant: ELITE SEMICONDUCTOR MICROELECTRONICS TECHNOLOGY INC.

Inventor： Cheng-Hung Tsai ,  Chien-Yi Chang

IPC: H03F3/45

Abstract: An input buffer circuit includes an input differential amplifier unit, a differential amplifier stage, and a buffer. The input differential amplifier unit has input terminals and at least one output terminal, wherein at least two of the input terminals of the input differential amplifier unit are configured to be capacitively coupled respectively so as to provide at least one pair of signal paths for a first input signal and a second input signal of a differential input signal. The differential amplifier stage, coupled to the input differential amplifier unit, has first and second differential input terminals, and a corresponding output terminal, wherein the first and second differential input terminals are capable of being coupled to the first input signal and the second input signal respectively. The buffer, coupled to the output terminal of the differential amplifier stage, is used for outputting an output single-ended signal.