Abstract: A power supplier for generating a supply voltage includes a PWM signal generator, a power conversion circuit, and first and second error amplifiers. The PWM signal generator generates at least one switching signal according to a voltage error signal. The power conversion circuit generates a switching voltage to an inductor according to the at least one switching signal so as to generate the supply voltage. The first error amplifier detects the difference between a positive voltage signal and a reference voltage. The second error amplifier detects the difference between a negative voltage signal and a ground voltage. Output terminals of the first and second error amplifiers are coupled to a first node. The voltage error signal is generated at the first node. The PWM signal generator modulates a duty cycle of the switching signal according to the variation of the voltage error signal.

Abstract: A power supplier for generating a supply voltage is provided. The power supplier includes a PWM signal generator, a power conversion circuit, and first and second error amplifiers. The PWM signal generator generates at least one switching signal according to a voltage error signal. The power conversion circuit generates a switching voltage to an inductor according to the at least one switching signal so as to generate the supply voltage. The first error amplifier detects the difference between a positive voltage signal and a reference voltage. The second error amplifier detects the difference between a negative voltage signal and a ground voltage. Output terminals of the first and second error amplifiers are coupled to a first node. The voltage error signal is generated at the first node. The PWM signal generator modulates a duty cycle of the switching signal according to the variation of the voltage error signal.