| 摘要 |
<p>This variable-current source comprises a differential stage (10) and a pair of voltage buffers (11,12) which respectively receive, at the input, a variable input voltage (VIN) and a reference voltage (VREF) and are connected at the output to the differential stage. Both buffers comprise a resistor (R1,R2) flown by a current which varies only as a function of the respective input voltage and of its resistance and therefore depends thermally exclusively on this resistance, and provide output voltages (V1,V2) which depend upon these currents, so that the output current generated by the differential stage (10) is temperature-independent.</p> |
