| 主权项 |
1. A current driver for a diode system, comprising
a current regulator that is configured to receive from a power supply a bias voltage, wherein the bias voltage shifts a compliance voltage range of the current regulator to include a knee voltage of a diode load, and wherein the bias voltage has a value that corresponds to a lower bound of the shifted compliance voltage range; and a switch element that is coupled to the current regulator and that is configured to detect a voltage level that is output by the current regulator to supply drive current to the diode load, wherein the switch element has (a) a high impedance when the voltage level that is output by the current regulator to supply drive current to the diode load is less than the value of the bias voltage and (b) a low impedance when the voltage level that is output by the current regulator to supply drive current to the diode load is greater than a sum of a threshold voltage value and the value of the bias voltage. |
