Patent ID: 8300510
Filing Date: 2012-10-30
Classification: G11B

Abstract:
1. A laser diode write driver for driving a light source, comprising: a feedback loop coupled for receiving an input current signal, the feedback loop operative for reaching a steady state and comprising a first Class AB driver in series with a first Class A driver, wherein the feedback loop transmits a first current signal; a current mirror adapted to receive the first current signal, the current mirror operative for replicating the first current signal and transmitting a second current signal; a differential device adapted to receive the second current signal, the differential device operative for steering current in at least one direction and transmitting a first voltage signal; a second class AB driver adapted to receive the first voltage signal and transmit a first drive signal, a second Class A driver adapted to receive the first drive signal and transmit a second drive signal; an output device coupled to the second drive signal and operative for transmitting a driver output signal that drives the light source in response to receiving the second drive signal.