Patent ID: 8854928

Claim:
A laser diode driver apparatus, comprising: an anode section Φ1 switch to transfer an anode section Φ1 reference voltage V(AΦ1) to an output AHC of an anode section of the driver apparatus at a Φ1 switching time; an anode section Φ1 voltage source VS(AΦ1) coupled between an input of the anode section Φ1 switch and an anode section common mode junction to generate V(AΦ1); an anode section Φ2 switch to transfer a Φ2 reference voltage V(AΦ2) to the output AHC of the anode section portion of the driver apparatus at a Φ2 switching time; an anode section Φ2 voltage source VS(AΦ2) coupled between an input of the anode section Φ2 switch and the anode section common mode junction to generate V(AΦ2), V(AΦ1) of greater absolute magnitude than V(AΦ2); an anode section impedance matching buffer coupled to an output of the anode section Φ1 switch and to an output of the anode section Φ2 switch; an anode section impedance matching resistor coupled between an output of the anode section impedance matching buffer and the output AHC; a cathode section Φ1 switch to transfer a cathode section Φ1 reference voltage V(CΦ1) to an output CHC of a cathode section of the driver apparatus at a Φ1 switching time; a cathode section Φ1 voltage source VS(CΦ1) coupled between an input of the cathode section Φ1 switch and a cathode section common mode junction to generate V(CΦ1); a cathode section Φ2 switch to transfer a Φ2 reference voltage V(CΦ2) to the output CHC of the cathode section of the driver apparatus at a Φ2 switching time; a cathode section Φ2 voltage source VS(CΦ2) coupled between an input of the cathode section Φ2 switch and the cathode section common mode junction to generate V(CΦ2), V(CΦ1) of greater absolute magnitude than V(CΦ2); a cathode section impedance matching buffer coupled to an output of the cathode section Φ1 switch and to an output of the cathode section Φ2 switch; a cathode section impedance matching resistor coupled between an output of the cathode section impedance matching buffer and the output CHC; a cathode section common mode voltage source VS(CCM) coupled to the cathode section common mode junction to establish a cathode driver output terminal voltage V(CHC); and an operational amplifier coupled as a feedback element between the cathode driver output terminal CHC and the anode section common mode junction, a first input to the operational amplifier coupled to CHC, a second input to the operational amplifier coupled to the cathode section common mode junction, and an output of the operational amplifier coupled to the anode section common mode junction, feedback to the anode section common mode junction to stabilize driver-supplied laser diode current.