| 摘要 |
Disclosed is an integrated circuit which comprises: a constant voltage circuit including a reference voltage generator, a feedback amplifier, a differential amplifier having an input for receiving an output signal of the reference voltage generator as a reference signal and another input for receiving an output of the feedback amplifier as a negative feedback signal, and a monochannel output driver driven in accordance with an output of the differential amplifier; a circuit load connected to an output of the constant voltage circuit; and an MOS transistor connected in parallel to the circuit load and arranged so as to be driven when a heavy load is periodically driven. The MOS transistor is turned on in a heavy load operation to thereby rapidly discharge a charge in the capacitance of the constant voltage circuit and a charge in the capacitance in the circuit load are rapidly discharged so that an output of the feedback amplifier is made to cope with the fluctuation in voltage, whereby the mono-channel output driver in the output stage is properly controlled to suppress the fluctuation in output even when a power source fluctuates.
|
