Wich switch cap circuit is this?

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Tanegashima
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Switched-capacitor circuit schematic with input vi(t) through switch Φ1 to capacitor C1, switch Φ2 to ground, and an AD8628 op-amp integrator with feedback capacitor C2, output vo(t); right side shows Φ1 and Φ2 clock timing waveforms marked (n-1)T, (n-1/2)T and nT.


C1=C2

Thanks
 
Tanegashima said:
Switched-capacitor circuit schematic with input v_i(t) through switch Φ1 to capacitor C1, switch Φ2 to ground, and a feedback capacitor C2 around an AD8628 op-amp producing v_o(t); beside it, timing diagram of Φ1 and Φ2 with instants (n-1)T, (n-1/2)T and nT.


C1=C2

Thanks

What do you think its function is? Where did you get it? Is this for schoolwork?