Bode diagrams
Frequency study of sampled systems
Archive REF: R7180 V1
Bode diagrams
Frequency study of sampled systems

Authors : Claude HUMBERT, Michel AUBRUN

Publication date: July 10, 1982, Review date: September 16, 2024 | Lire en français

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3. Bode diagrams

Representation in the Bode plane involves treating the modulus and argument of F (jω) separately as a function of frequency. This technique is not directly applicable to the case of a sampled transfer function F *(jω), which has an infinite number of poles.

3.1 Using the w-transform

Here we use the homographic transform (see Deterministic signals. Transforms and abacuses ) : w=z−1z+1=exp jω T−1exp jω T+1

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