A two op-amps third-order ΣΔ modulator with complex conjugate NTF zeros
نویسندگان
چکیده
This paper presents a third-order Sigma-Delta modulator that uses only two operational amplifiers. A fully digital solution reduces both amplifiers output swings. This design achieves complex conjugate zeros that allows obtaining a signal-to-noise ratio of about 8 dB better than having all the zeros placed at z = 1. Behavioral level simulations demonstrate the effectiveness of the approach.
منابع مشابه
Design of a third-order ΣΔ modulator with minimum op-amps output swing
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