Patent ID: 7505497
Filing Date: 2009-03-17
Classification: H01S,H04B

Abstract:
1. An optical device driver comprising: a buffered level shifter circuit to shift an input voltage to a first voltage level or to a second voltage level, wherein said buffered level shifter circuit is tunable through k+1 control signals to shift an input of the optical device driver to a controlled voltage level at a controlled rate and with adjustable impedance responsive to a transition of a digital voltage sequence; a modulation circuit to generate a first current signal of a modulation mode responsive to the input voltage of the first voltage level and to generate the first current signal of a bias mode responsive to the input voltage of the second voltage level; a bias control circuit to adjust the bias mode of said first current signal through one or more bias control inputs; and a modulation control circuit to adjust the modulation mode of said first current signal through one or more modulation control inputs.