| 摘要 |
PROBLEM TO BE SOLVED: To provide a transconductor with a phase compensator which does not impair a gain in a high-frequency band. SOLUTION: The transconductor includes: an amplifier A1 which inputs a first input signal at an input terminal Vin+; an amplifier A2 which inputs a second input signal at an input terminal Vin-; a voltage-current converter Gm1 which inputs outputs of the amplifiers A1 and A2; a resistance R1 connected between output terminals of the voltage-current converter Gm1; an in-phase signal detector CM which detects an in-phase signal from the output of the amplifier A1 and the output of the amplifier A2; voltage-current converters Gm2 and Gm3 which input the output of the in-phase signal detector CM and output a current to the voltage-current converter Gm1; a phase compensator PC1 connected between the output end of the in-phase signal detector CM and the output of the amplifier A1; a phase compensator PC2 connected between the output terminal of the in-phase signal detector CM and the output terminal of the amplifier A2; and a fourth voltage-current converter Gm4 which inputs the output of the amplifier A1 and the output of the amplifier A2. COPYRIGHT: (C)2009,JPO&INPIT
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