Demystifying Switched Capacitor Circuits

Demystifying Switched-Capacitor Circuits

34

bottom-plate parasitic (C

bp

), whose absolute values tend to vary, and are not control-

lable even through careful fabrications. Depending on circuit layout and process

technology, C

tp

varies from 0.1% to 1%, while C

bp

varies from 5% to as much as

20% of the desired capacitance C [10]. In Section 3.3, we will learn in detail how

this particular SC element (or its modifi cation, discussed later) can be used to effec-

tively eliminate the effects of parasitic capacitances.

By following the same procedure employed throughout this section, we can

derive the equivalent resistance simulated by the circuit in Fi ...