Environmental Engineering Reference
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the measurement data extracted from [57]. It is seen that with the
increase in the number of sidebands folded over, the total output noise
power increases monotonically. It eventually converges to a finite power
irrespective of any further increase in the number of sidebands. The
simulation results are in a very good agreement with the measurement
data.
The efficiency of the adjoint network algorithm is demonstrated by
comparing the CPU time of the algorithm with that of the brute-force
method. Fig.11.33 shows the CPU time of the proposed algorithm on
computing the output noise power of the switched capacitor integrator
with (a) only the noise of M1 considered and (b) all noise sources, i.e.
the noise of and operational amplifier, considered. As can be
seen that the amount of time spent in both cases is nearly the same. This
observation validates our earlier statements on the advantages of using
the transfer function theorem in noise analysis. Also observed that the
cost of computation is linearly proportional to the number of sidebands
folded over.
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