| 摘要 |
<p>A semiconductor integrated circuit comprises a chip (TIP), an oscillator (200) provided on the for producing an alternate current with a controlled amplitude that is determined by the drive voltage, a rectifier (300) provided on the chip for receiving and converting the alternate current into a direct current, a voltage detector (100) provided on the chip for detecting a voltage level of the direct current, and a controller (600) provided on the chip and supplied with the detection signal from the voltage detector for controlling the oscillator such that the amplitude of the alternate current is changed in response to the detection signal. The controller increases the amplitude of the alternate current when the voltage level of the direct current has decreased below a predetermined level and decreases the amplitude of the alternate current when the voltage level of the direct current has increased above the predetermined level. <IMAGE></p> |
