Patent ID: 11894655
Assignee: SITRUS TECHNOLOGY CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A method for manufacturing an integrated laser driver for a CMOS PAM4 communication chip for electro-absorption modulated laser (EML) and directly modulated laser diode (DML) applications, comprising:
forming a retimer configured to convert low-speed parallel data to a high-speed serial bit stream and to an inverted representation of the high-speed parallel bit stream;
forming a multi-bit PMOS DAC configured to receive a first buffered bit stream;
forming a multi-bit NMOS DAC configured to receive a second buffered bit stream;
coupling a first DC level-shifting predriver array between the retimer and the PMOS DAC for receiving the high-speed parallel bit stream and the inverted high-speed parallel bit stream; and
coupling a second DC level-shifting predriver array between the retimer and the NMOS DAC for receiving the high-speed parallel bit stream and the inverted high-speed parallel bit stream.