1. An Efficient and Accurate DC Analysis Technique for Switched-Capacitor Circuits
Gabor C. Temes
School of Electrical Engineering and Computer Science
Oregon State University

2. SC branch and DC model

3. Power and Energy Relations
Power at input :
Total Energy drawn from input :
Change in energy stored in C :
Power lost in switches, independent of switch(Ron):

4. Special Cases

5. SC Voltage-Doubler

6. DC model without Parasitics
Power Efficiency

7. DC model with Parasitics

8. Parameters with Stray Capacitances
DC Parameters
Vout
Iin
Iout
Pin
Pout η
DC Model
9.285V
44.29A
10A
221.4W
92.86W
42%
HSPICE
9.2226V
45.53A
10.15A
227.6W
93.64W
41%
Power efficiency is reduced due to the losses in parasitic

9. Active Filter Stage (1/2)

10. Active Filter Stage (2/2)

11. Input CM Generated in SCF (2/2)
If (VA-VC)avg=0, the virtual ground VD will be connected to VB=VCM by an Reg=T/C resistance. Leakage current I causes changes in bias, or in common-mode voltage. For fully differential circuits;

12. Input CM Generated in SCF (1/2)