| 摘要 |
PROBLEM TO BE SOLVED: To constitute a stable and wide-band power amplifier utilizing superior characteristics of an operational amplifier IC. SOLUTION: A current feedback amplifier comprises the operational amplifier IC having a power terminal for producing a signal of a current form and sending the signal to a next stage of an amplifier circuit, the amplifier circuit inputting the signal of the amplifier IC and current feeding-back the signal output from the amplifier IC. When a semiconductor device with an integrated section for producing and voltage-amplifying the current from the amplifier IC is made, an amplifier, having a high performance, can be constituted at a low cost.
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