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I am looking at various current sensing techniques to improve efficiency. Once I saw an ap note about a way to bias the current sense amplifier using a lower value sense resistor than usual. The sense amplifier was biased up with a voltage through a resistor from a positive source. In this manner, this made the current sense amp work with the smaller voltage across the lower value current sense resistor. This is a rough anology to using a comparator with a low value resistor across its inputs...the comparator trips with a very small voltage to the input. Unfortantly, I can't find the Ap Note again. Perhaps you have seen it. Any thing on current sense will help. Thanks.
Please search for “current sensing amplifier” in a search engine and you will see quite a few application notes regarding this topic. For instance the application note AN6049 etc. Here is our portfolio of operational amplifiers: http://www.onsemi.com/PowerSolutions/pa ... .do?id=133. Thank you.
Answered by: ON Semiconductor
2011-11-03 20:09:52.0