| 摘要 |
PROBLEM TO BE SOLVED: To provide a current control circuit, signal-amplifying apparatus using the same and electronic device in which a current control circuit for controlling the current to be supplied to a plurality of load circuits can be small-sized. SOLUTION: In a bias current control circuit 100 for controlling the current to be supplied to a plurality of amplifiers AMP1-AMP4, a current generator 10 generates a first current Ic1 that varies with time, and a second current Ic2 that has a complementary relation with the first current. A plurality of current output parts 30-36 are provided for each of the plurality of amplifiers AMP1-AMP4 and respectively supply any among the first current IC1, the second current and a sum (Ic1+Ic2) of the first and second currents as bias currents Ibias1-Ibias4. The current output units 30, 32 controls the amplifiers AMP1, AMP2 so that the bias currents Ibias1, Ibias2 have a complementary relation. Similarly, the current output units 34, 36 control the amplifiers AMP3, AMP4 so that the bias currents Ibias3, Ibias4 have a complementary relation. COPYRIGHT: (C)2006,JPO&NCIPI
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