REALIZATION OF CASCADE OF RESONATORS WITH DISTRIBUTED FB SIGMA-DELTA

✅ The Sigma Delta Modulator (SDM) based analog to digital conversion is cost effective and ➕ have the advantages as higher reliability, increased functionality, and ➕ reduction in chip cost. The thesis work ⚙️ includes the modeling of SDM with the signal 🚦 flow graph 📈 in Matlab, optimization of the coefficients to improve the noise transfer function and ➕ signal 🚦 transfer function. A procedure to 🔎 find the maximum stable input 🔣 range for the design. Scaling ⚖️ the inputs 🔣 of the integrator so that the maximum output signal 🚦 can 🥫 be obtained according to the operational transconductance amplifier (OTA) output range. Further we 👥⬅️ derived error bound for the design. Then step by step realization of the SDM form the signal 🚦 flow graph 📈 (SFG) to a fully differential switched-capacitor (SC) network is shown. The work ⚙️ also includes complete differential transistor level 🎚️ realization for 3️⃣-bit flash 📸 analog to digital converter (ADC), thermometric to binary encoder, a switch- capacitor digital to analog converter (DAC) circuit and ➕ an on-chip circuit realization of the non-overlapping clock ⏰ generation circuitry.

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