| 摘要 |
<p>A method and apparatus for providing electrical output current. The method includes providing a supply current, providing a first and second voltage input signal for controlling output current and generating an output current based on a differential voltage measured between the first and second input voltage signals including increasing the supply current as the output current increases. The apparatus for providing electrical current includes biasing circuitry providing a biasing current ICC and input circuitry including a first and second voltage input. The input circuitry is operable to receive the biasing current ICC and to divide the biasing current ICC based on the differential voltage measured between the first and second voltage inputs producing first and second biasing currents. A pair of translinear circuits is included that are operable to receive the first and second biasing currents and responsive thereto produce a first and second output currents. The first and second output currents are summed to produce a final output current for the device where the final output current is a minimum of ICC when the differential voltage is approximately zero volts.</p> |
