Receiver (RX)

In a Serializer/Deserializer (SerDes) system, the Receiver (RX) is the critical component that accepts a high-speed serial data signal from a transmission medium (like a cable or backplane). Its primary function is to recover the clock signal embedded within the incoming data, sample the data stream accurately, deserialize it (convert it from a serial bitstream back into parallel data words), and often perform signal conditioning, equalization, and error detection/correction to compensate for signal degradation during transmission.

The Receiver operates by first using a clock and data recovery (CDR) circuit to extract the timing information from the incoming serial data stream. This recovered clock is used to sample the data at the optimal point in each bit period. An analog front-end, which may include a continuous time linear equalizer (CTLE) or decision feedback equalizer (DFE), compensates for channel losses and inter-symbol interference (ISI). The sampled data is then passed through a deserializer (a serial-in, parallel-out shift register) to convert the high-speed serial stream into lower-speed parallel data for processing by the host system (e.g., an FPGA, ASIC, or processor).