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Precision Current-Sink/Source Circuits Configure as ...

Maxim > Design Support > Technical Documents > Application Notes > Amplifier and Comparator Circuits > APP 4508 Keywords: 4-20mA transmitters, Precision current mirrors, current-sense resistor ratios APPLICATION NOTE 4508 Precision Current-Sink/Source Circuits Configureas Mirrors or AmplifiersNov 11, 2010 Abstract: The Precision current mirrors shown allow you to transform one type of 4 20mA transmitter toanother, or to create a repeater for the purpose of extending the length of the current loop. The circuitsinclude an input-sink/output-sink mirror and an input-source/output-source mirror. A similar version of this article appeared in the September 21, 2008 issue of EE Times 4 20mA transmitters used in industrial current-control loops can be implemented as poweredcurrent sources, remote non-powered current sinks, or with several other I/O useful building block for some of these applications is a Precision current mirror, which allows you totransform one type of transmitter to another, or to cr

Precision Current-Sink/Source Circuits Configure ... range of values, the absolute value of these matched current-sensing resistors has no effect on the

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