Patent ID: 11894959
Assignee: XILINX, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 20:
21. A transmitter circuit comprising:
two or more input converter circuits coupled in parallel, each of the two or more input converter circuits configured to convert a non-return-to-zero (NRZ) input voltage signal to a corresponding current signal; and
a combining circuit, the combining circuit configured to combine the two or more corresponding current signals to generate a pulse amplitude modulation level N (PAM-N) signal output,
wherein each of the two or more input converter circuits or the combining circuit are hardcoded or programmed with a respective weight, and wherein the respective weights for the two or more input converter circuits are programmed to reduce a number of levels in the PAM-N signal output based on tristating at least one of the two or more input converter circuits or making the NRZ input voltage signal of a plurality of the two or more input converter circuits identical.