Patent ID: 9348348
Filing Date: 2016-05-24
CPC Classification: G05F

Claim Text:
1. A multi-stage amplifier comprising a differential amplification stage configured to provide a stage output voltage at an output node, based on a first input voltage at a first input node and a second input voltage at a second input node; wherein the differential amplification stage comprises a first input transistor and a second input transistor forming a differential pair, wherein a gate of the first input transistor forms the first input node for receiving the first input voltage; wherein a gate of the second input transistor forms the second input node for receiving the second input voltage; and wherein an output node of the second input transistor forms the output node of the differential amplification stage; a second amplification stage comprising a detection circuit comprising wherein the detection circuit is configured such that the sensing point changes from a default state to a detection state, subject to the stage output voltage at the output node deviating from a default voltage by at least a pre-determined threshold value.