Chapter 479

Chopper amplifiers complement a DC accurate lowpass filter

Nello Sevastopoulos


The LTC1062, which is ideal when used in conjunction with high performance chopper-stabilized operational amplifiers; is described.


Filter design

lowpass filter

chopper amplifier



Monolithic switched-capacitor lowpass filters, although they offer precise frequency responses, cannot usually be used for DC accurate applications because of their prohibitive DC offsets and poor gain linearity. The LTC1062, however, is quite different from currently available lowpass switched-capacitor filters because it uses an external (R, C) to isolate the IC from the input-signal DC path and to provide anti-aliasing for incoming ...

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