| 摘要 |
A regulated voltage supply circuit having improved power supply rejection ratio is achieved. The circuit comprises, first, a voltage follower having an input, an output, and a power supply voltage. The input is coupled to a reference voltage. The output comprises the regulated voltage supply. Second, a means of compensating noise on the power supply voltage comprises phase shifting the power supply voltage 180 degrees and feeding back the phase shifted power supply voltage to the voltage follower input to thereby improve power supply rejection ratio. The means of compensating noise may comprise an adjustable gain. This adjustable gain may further comprise an adjustable value resistance. The adjustable gain is used in a to optimize the PSRR by testing comprising modulating noise on the power supply voltage, measuring the noise on the regulated voltage supply, and adjusting the gain.
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