Patent ID: 7443210

Claim:
A transmission circuit for use in an input/output interface, said transmission circuit comprising: a first-stage circuit comprising at least an active MOS device for receiving an input voltage and issuing a first voltage signal, wherein said active MOS device has an inductive feature during operation in a high frequency mode to compensate said first voltage signal; a second-stage circuit electrically connected to said first-stage circuit for outputting a first output voltage in response to said first voltage signal; a negative active feedback circuit electrically connected to said second-stage circuit for receiving said first output voltage and enhancing the bandwidth of said first output voltage; and a current buffer included in said negative active feedback circuit and electrically connected to said first-stage circuit and said second-stage circuit for receiving said first output voltage and enhancing the gain value of said first output voltage, wherein a second voltage signal is issued from said first-stage circuit and compensated by said first output voltage transmitted from said current buffer to enhance the bandwidth and the gain value thereof, and a second output voltage is outputted from said second-stage circuit in response to said compensated second voltage signal.