Demystifying Switched Capacitor Circuits

Demystifying Switched-Capacitor Circuits

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It can be seen that this is identical to Equation (3.49). Thus, this LDI also has a

phase shift of p /2.

To investigate the behavior of the series SC integrator with respect to C

p3

(i.e., the

only parasitic capacitance that matters), we again employ the principle of superposi-

tion. The circuit shown in Figure 3.2(d) is essentially composed of two subcircuits:

an ideal series SC integrator with a switched capacitor of C and an ideal parallel SC

integrator with a switched capacitor of C

p3

. Note that the outputs of both circuits

jump only when Φ

1

→ 1. From Equations (3.41) and (3.52) we can obtain the t ...