| 摘要 |
PROBLEM TO BE SOLVED: To stably operate a class-D amplifier in which an error integral value having a small allowable input voltage is installed. SOLUTION: Respective PWM input signals INP, INM input to input terminals 101p, 101n are input to nodes VP, VM, respectively, connected to a positive phase input terminal 111p and a reverse phase input terminal 111n of an error integrator 110 through an input circuit 40. The input circuit 40 has: a transmission route 41 for transmitting the PWM input signal INP to the node VP; a transmission route 42 for transmitting the PWM input signal INM to the node VM; a transmission route 43 for transmitting a PWM input signal/INP obtained by inverting the phase of the PWM input signal INP to the node VM; and a transmission route 44 for transmitting a PWM input signal/INM obtained by inverting the phase of the PWM input signal INM to the node VP. COPYRIGHT: (C)2011,JPO&INPIT
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