| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a current detector capable of accurately performing temperature compensation of a secondary winding resistance. <P>SOLUTION: The current detector includes a transformer 1, a load resistance 2 connected between secondary-side terminals of the transformer 1, a voltage amplifier 5 which amplifies a voltage developed across the load resistance 2, an input resistance 3 connected to one secondary-side terminal of the transformer 1 in parallel with the load resistance 2, and a feedback resistance 4 which determines an amplification factor of the voltage amplifier 5 together with the input resistance 3. The input resistance 3 is constituted including a thermistor and compensates for temperature characteristics of a winding resistance 11 of the transformer 1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
