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AC & OpAmp Provide Variable Control Voltage - 12/06/01 EDN-Design Ideas: Early
DACs contained standard R-2R ladder networks, and produced a negative output voltage.
These early DACs, such as MAX7837/7847 and MAX523, require both positive
and negative supply rails to accommodate ir negative output. With transition to
single-supply ICs, however, many modern DACs operate with a single supply rail and an
inverted R-2R ladder network.....(design idea added 4/08)
Amplifier Requires No DC Bias - 03/16/00 EDN-Design Ideas: Intrinsically
capacitive transducers and or high-impedance signal sources usually require ac
coupling and a buffer amplifier to condition signal for furr processing. Buffers
take many forms, but most of m compromise signal quality through.....(design idea
added 11/05)
