DRIVER FOR OPTICAL MODULATOR WITH PROGRAMMABLE BIAS

原文（中国語）

Embodiments herein relate to a driver circuit for an optical modulator such as a micro-ring modulator (MRM). The driver circuit includes first and second drivers which receive respective differential data signals, and which have their output nodes coupled to a cathode and anode, respectively of the MRM. One or both of the drivers can have their output nodes alternating-current (AC)-coupled to a bias circuit which biases the voltage of the output signal to shift its voltage swing. The bias circuit can include a latch which receives Vbc_high at its power supply terminal and Vbc_low at its ground terminal, where Vbc_high>Vbc_low>0 V.