University of Illinois Urbana-Champaign

Analog Filter Design Using Ring Oscillator Integrator (ROI) in 180 nm CMOS

Wang, Danyang

Content Files
ECE499-Sp2014-wangDanyang.pdf

Permalink

https://hdl.handle.net/2142/55504

Description

Title
Analog Filter Design Using Ring Oscillator Integrator (ROI) in 180 nm CMOS
Author(s)
Wang, Danyang
Contributor(s)
Hanumolu, Pavan
Issue Date
2014-05
Keyword(s)
  • analog filter
  • ring oscillator integrator
  • 180nm CMOS
Date of Ingest
2014-10-24T21:33:25Z
Abstract
In this thesis, a novel technique of implementing an integrated active analog filter is discussed. It employs a ring-oscillator integrator (ROI) as a key element to build an on-chip low-pass filter. The motivation is to implement an analog filter using integrated circuit technology instead of discrete components to achieve area-saving, which is a key constraint for wearable electronics. The traditional operational amplifier (op-amp) based active filter is largely limited by the finite gain of the op-amp itself and the non-ideality of transistors. Scaling also contributes to the unreliability of the op-amp based filter because the output resistance of the transistor is severely reduced. ROI, on the other hand, has much better DC gain, which is approximately infinite at low frequency and independent of process scaling. The unique property could greatly compress the non-ideality that exists in op-amp circuits. The design is first simulated in MATLAB/SystemVerilog to construct system-level requirements. Then the circuit-level simulation is performed using 180nm CMOS technology with 1.8V power supply in Cadence. The achieved bandwidth is 10MHz.
Type of Resource
text
Genre of Resource
Other
Language
en
Permalink
http://hdl.handle.net/2142/55504

Owning Collections

Senior Theses - Electrical and Computer Engineering PRIMARY
The best of ECE undergraduate research