Patent ID: 7646988

Claim:
An active linear transmitter optical subassembly, comprising: a header electrically coupled to a chassis ground; and a circuit mounted on the header and comprising: a first input node configured to receive a first data signal; a second input node configured to receive a second data signal that is complementary of the first data signal; a buffer stage having a first node coupled to the first input node and the buffer stage having a second node coupled to the second input node, the buffer stage including two termination resistors, a capacitor and a first bipolar transistor; an amplifier stage having a fifth node coupled to a third node of the buffer stage, the third node of the buffer stage including an emitter terminal of the first bipolar transistor, and the amplifier stage having a sixth node coupled to a signal ground, wherein the signal ground is not coupled to the chassis ground; and an electro-optical transducer having an eighth node coupled to a seventh node of the amplifier stage and the electro-optical transducer having a ninth node configured to be coupled to a voltage source, the electro-optical transducer being coupled to a fourth node of the buffer stage, the fourth node of the buffer stage including a collector terminal of the first bipolar transistor.