Patent ID: 7424228

Claim:
An optical transmitter, comprising: an optical generator having a pair of input terminals for receiving a differential electrical drive signal and for outputting a corresponding optical signal; an input port for receiving an input electrical signal; a transformer having a primary winding and a second winding, the primary winding receiving the input electrical signal from the input port; a choke connected to one end of the secondary winding of the transformer and connected directly to a first input terminal of the pair of input terminals to the optical generator; a second end of the secondary winding of the transformer being connected to a second input terminal of the pair of input terminals to the optical generator; the secondary winding of the transformer delivering the differential electrical drive signal to the optical generator; an impedance element between the secondary winding of the transformer and the optical generator for matching an input impedance to the optical generator; a current driving circuit for providing a constant current drive signal to the optical generator; and a second choke positioned between the current driving circuit and the optical generator.