Laser diode write driver

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 first current source coupled between a first supply voltage and an input of the current mirror;
• a second current source coupled between the first supply voltage and an an input of a second Class AB driver;
• 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.

An optical disk drive system associated with a laser diode, the optical disk drive system comprising:

• a current generator for receiving input signals;
• a current switch coupled to receive timing signals;
• and
• a current driver coupled to a feedback loop coupled for receiving an input current signal, the feedback loop operative for reaching a steady state and comprising a Class AB driver in series with a 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.