Switched-Capacitor Circuits - University of Toronto
Switched-Capacitor Circuits - University of Toronto
Switched-Capacitor Circuits - University of Toronto
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<strong>University</strong> <strong>of</strong> <strong>Toronto</strong><br />
SC Full-Wave Rectifier<br />
• Use square wave modulator and comparator to make<br />
• For proper operation, comparator output should<br />
changes synchronously with the sampling instances.<br />
v in<br />
v in<br />
Q 1<br />
<strong>University</strong> <strong>of</strong> <strong>Toronto</strong><br />
Square Wave<br />
Modulator<br />
ca<br />
SC Peak Detector<br />
<br />
comp<br />
C H<br />
v out<br />
v out<br />
• Left circuit can be fast but less accurate<br />
• Right circuit is more accurate due to feedback but<br />
slower due to need for compensation (circuit might<br />
also slew so opamp’s output should be clamped)<br />
v in<br />
opamp<br />
V DD<br />
Q 2<br />
C H<br />
59 <strong>of</strong> 60<br />
© D. Johns, K. Martin, 1997<br />
v out<br />
60 <strong>of</strong> 60<br />
© D. Johns, K. Martin, 1997
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