In general, the \"electrical chip\" is the general term for the chip that needs to process electrical signals in the optical communication system, which generally includes the cross-resistance amplification chip (TIA), the limiting amplification chip (LA), the laser Driver chip (LD Driver), the clock data recovery chip (CDR), etc., and then extend a little. It also includes microcontroller (MCU) in optical communication module, high-speed modulator driver chip and so on.