Maxim Integrated Products, Inc.
SYSTEMS AND METHODS FOR A CURRENT SENSE AMPLIFIER COMPRISING A SAMPLE AND HOLD CIRCUIT

Abstract:

Described herein are systems and methods that reduce settling time in amplifier circuits, such as voltage sense amplifiers (VSA) or current sense amplifiers (CSA) circuits, that comprise a feedback path. When the feedback path is interrupted via a switch, a CSA circuit switches to open loop. A sample-and-hold circuit holds the output voltage of the amplifier, such that when a load is connected to the CSA circuit, the open loop settling time, which is shorter than the closed loop settling time, is allowed to pass before the CSA output voltage is measured, thereby, advantageously preventing any potential disturbance present at the CSA output from being fed back to the CSA input.