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Current-Sense-Slide7

A typical current sense amplifier is designed on a process where the input transistors are able to withstand high voltages. These parts convert the input differential voltage into a proportional current. This current is then converted back into a voltage via internal precision ground referenced resistors. This type of current sensor offers very high input impedance due to the transistor input stage and very high common mode rejection. They also have a high bandwidth, typically in the 500kHz range at a gain of 20V/V.

PTM Published on: 2009-04-23