Patent ID: 9496835
Filing Date: 2016-11-15
CPC Classification: G01R,H03F

Claim Text:
1. An extended common mode (CM) input voltage range current sense amplifier, comprising: a low voltage (LV) p-type metal oxide semiconductor (PMOS) input module coupled to a positive supply rail, wherein said positive supply rail provides a voltage comprising the maximum between a positive input signal (IN+) voltage applied to the amplifier and an internal power supply voltage; and a voltage regulator coupled to the positive supply rail that generates a decreased voltage level relative to the positive supply rail voltage that is provided to the LV PMOS input module via a high voltage ground (HV_GND) line, wherein at least part of the LV PMOS input module is powered by a voltage difference between the positive supply rail and the HV_GND line, and wherein the voltage regulator maintains said voltage difference within an operating range of one or more LV devices within the LV PMOS input module.