| 摘要 |
PURPOSE:To perform a desirable current control without insensing zone without reducing a carrier frequency by feeding back an average value of each phase offset value obtained by adding the outputs of current amplifiers of the respective phases in a direction for erasing the offset at the input sides of the amplifiers. CONSTITUTION:The outputs of complete PI type current amplifiers 1 of respective phases are input to an offset erasing circuit 12 to be combined to be added. The average value of the offset outputs during outputting is produced, and the amplifiers 1 are negatively fed back in a direction for erasing the offset. Thus, the offsets can be reduced. Even if a carrier frequency is not reduced, an ideal current control without insensing band can be performed. |
