| 摘要 |
<p>A circuit (40) has a first sense resistor circuit (42) having components including a first-circuit active element (36) to provide a sense resistance to sense a current (I) in a load (14) in series therewith, the sense resistance being established by an input command voltage (Vin). A second sense resistor circuit (42') has components replicating the components of the first sense resistor circuit (42) including a replicated active element (36'), a resistance of the replicated active element (36') also being established by the input command voltage (Vin). A precision resistor (54) is coupled to the replicated active element (36') to provide a load thereto. When the input command voltage (Vin) establishes a voltage (Vref) across the replicated active element (36'), a voltage is established across the first-circuit active element (36) in proportion thereto to command a desired current (I) in the load (14).</p> |
