High unity gain bandwidth voltage regulation for integrated circuits

摘要

An integrated circuit voltage regulator uses a simple CMOS structure to implement a High Unity Gain BandWidth voltage regulator providing for low voltage ripple at the output of the regulator up to high frequencies in the hundreds of MHz range. A transconductor first stage is followed by an impedance cancellation second stage allowing DC gain to be set completely independently of the bandwidth.

主权项

1. A voltage regulator for wide bandwidth high frequency circuits comprising:
a transconductor first stage; and a negative impedance cancellation stage, wherein: Direct Current gain is independent of the bandwidth and wherein a noise immune low voltage ripple is provided at the output of the voltage regulator; said negative impedance cancellation stage comprises cross-coupled transistors at outputs of said transconductance first stage; and appropriately sized resistors introduce zeros in a transfer function, which compensates for parasitic poles and allows for bandwidth extension.