While much of this book focuses on how to build current sources using different kinds
of discretes, this chapter looks at some dedicated, monolithic IC current source cir-
cuits. These devices can be used in many diverse applications requiring microamps to
several milliamps and are readily available in either throughhole or surface-mount
packages. Actually, two dedicated monolithic current source ICs exist in the U.S. ana-
log marketplace. One of them is National Semiconductor’s LM134 series, and the
other is TI/Burr-Brown’s newer REF-200 (which we will review later in this chapter). ...
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