Patent ID: 6931040

Claim:
A laser diode driver output stage for driving an associated laser diode device, the laser diode driver output stage comprising: a driver circuit having at least one input node, a positive output node, and a negative output node, the driver circuit adapted to receive an input data signal at the at least one input node and provide an output signal to at least one of the positive output node and the negative output node in response to the data signal; a transformer having a positive terminal of a first side coupled to the positive output node of the driver circuit, a negative terminal of the first side coupled to the negative output node, and a positive terminal of a second side coupled to the positive output node; an RC network coupled between the negative output node of the driver circuit and the negative terminal of the first side of the transformer, the RC network adapted to suppress ringing of the output signal from the positive output node; and a bias current generator coupled to a negative terminal of the second side of the transformer, the bias current generator adapted to provide a bias current to the negative terminal of the second side, the transformer adapted to isolate the bias current from fluctuations in the output signal, whereby the output signal and bias current are provided to the associated laser diode device.