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C 2. R 2. C 1. R 1. V in. -. V out. +. GND. Why are we interested in Passives?. Switched-Capacitor Filters Continuous-Time Filters. Circuit of Choice (stray insensitive). SUMMARY OF THE FOUR SWITCHED CAPACITOR RESISTANCE CIRCUITS. Parallel. Series. Series-Parallel. Bilinear.
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C2 R2 C1 R1 Vin - Vout + GND Why are we interested in Passives? • Switched-Capacitor Filters • Continuous-Time Filters
Circuit of Choice (stray insensitive) SUMMARY OF THE FOUR SWITCHED CAPACITOR RESISTANCE CIRCUITS Parallel Series Series-Parallel Bilinear
Vout Vin Vdd + V - r0 C gmV GND GND GND GND GND Corner Frequency “tunable” by reference current Continuous-Time Filters Vin Vout Iref C • First-order filter • Unity-gain frequency: (1/2p) gm/ C = (1/2p) Iref / C UT Often called gm-C filters
Capacitor-Based Circuits Capacitor-Based Design Resistor-Based Design Resistors and Inductors define the circuit dynamics Capacitors and Inductors define the circuit dynamics Capacitors are the natural elements on silicon ICs
Overview of Floating-Gate Devices Information Storage Floating-Gate Transistor Modifying Floating-Gate Charge • UV photo-injection • Electron tunneling • Hot-electron injection