| 摘要 |
A buffer circuit is provided to reduce an occupied dimension by sharing a plurality of interface parts to one common bias supply part. A buffer circuit includes an interface parts(20) and a common bias supply part(22). The interface parts correspond to a plurality of input signals, differentially amplify each input signal and common bias, and have a differential amplification structure. The common bias supply part is driven by a reference voltage, and provides the common bias signal to each interface part. The common bias supply part includes a bias signal generating part and a bias stabilizing part. The bias signal generating part performs a pull up driving and a pull down driving in response to the reference voltage, and generates the common bias signal. The bias stabilizing part performs the pull up driving and the pull down driving in response to the common bias signal, and maintains a state of the common bias signal.
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