Abstract: An adaptive equalizer and automatic gain controller is disclosed. The adaptive equalizer and automatic gain controller includes a programmable continuous time linear equalizer (CTLE). The CTLE includes a control port to receive a control signal to adjust a frequency response of the CTLE. The adaptive equalizer and automatic gain controller also includes a power comparator coupled with an output of the CTLE and a controller coupled with the power comparator and the control port and configured to generate the control signal for the CTLE based on the output of the power comparator. The power comparator is configured to compare power of a low frequency part and a high frequency part of an output signal of the CTLE.

Abstract: A clamp circuit disposed between a receptacle and a circuit to be protected when a connector connects to the receptacle, the clamp circuit including a voltage detector configured to determine a level of a surge voltage in comparison to a threshold voltage, the voltage detector including a plurality of field effect transistors (FETs) of a first conductivity type connected in series, a first FET of a second conductivity type and a first resistor in parallel with the plurality of FETs, a second FET of the first conductivity type in parallel with the first FET, and a discharge circuit to discharge the surge voltage when the surge voltage approaches the threshold voltage.