Low-noise and low-sensitivity filters using current-mode coupled biquads (CROSBI ID 301224)
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Podaci o odgovornosti
Jurisic, Drazen ; Moschytz, George S.
engleski
Low-noise and low-sensitivity filters using current-mode coupled biquads
In this paper, it is shown that by adding coupling to biquad pairs to obtain a fourth-order band-pass filter, the output thermal noise is reduced. It is shown analytically that minimum output thermal noise is obtained when the biquads are identical and the negative-feedback factor used for coupling is the same as for the minimum sensitivity to component tolerances and ambient changes. Furthermore, by optimizing the coupled biquads for maximum dynamic range, the output noise is further decreased.
active filters ; analog circuits ; coupled biquads ; current‐feedback operational amplifiers ; filtering theory ; output thermal noise ; second‐generation current conveyors
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Podaci o izdanju
47 (11)
2019.
1713-1735
objavljeno
0098-9886
1097-007X
10.1002/cta.2695