Patent ID: 8513929
Filing Date: 2013-08-20
Classification: G05F

Abstract:
1. A Low-dropout linear regulator having at least three stages supplied by a supply voltage, comprising: a first stage having a differential amplifier and a folded cascode device with a regulated current mirror; a first and a second node coupling the differential amplifier and the regulated current mirror and receiving a differential signal, the regulated current mirror configured to convert and amplify the differential signal to a single ended signal, a first capacitor for frequency compensation, said first capacitor coupled between said first stage and a second stage; a second capacitor for balancing capacitive loading of a first cascode circuit, said second capacitor coupled between said first stage and said supply voltage, wherein said first cascode circuit is configured to suppress different voltages between an input and an output of the first and second capacitors due to modulations of said supply voltage; and a second cascode circuit configured to suppress supply modulations of the differential amplifier.