Design of fully digital inductors for low bandwidth filter applications

Salz, Braedon Lenox

Permalink

https://hdl.handle.net/2142/98402 Copy

Description

Title

Design of fully digital inductors for low bandwidth filter applications

Author(s)

Salz, Braedon Lenox

Issue Date

2017-07-17

Director of Research (if dissertation) or Advisor (if thesis)

Hanumolu, Pavan K.

Department of Study

Electrical & Computer Eng

Discipline

Electrical & Computer Engr

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• Inductor
• Phase-domain
• Time-domain signal processing

Abstract

We are currently living in the age of intelligent machines, where we are interested in acquiring data and making decisions all from some sort of embedded environment. Of particular value are personal health metrics, such as the analysis of heart rate, muscle action potentials, and brain waves. Collecting this data requires new advances in the circuitry behind much of classical filter design. In this thesis, we present a digital inductor based on time-domain signal processing. This approach uses the phase-domain theory that is well-known and understood in the fields of clocking and serial links and applies it to analog circuit design. By using a ring oscillator to integrate the input voltage and a switched transconductor to inject current into the input node, the proposed time-domain gyrator achieves inductive input impedance without using either large resistors or capacitors. Realizing the gyrator in this manner makes it significantly more amenable for technology scaling. Fabricated in 65 nm CMOS process, the inductor operates from a 0.7 V supply voltage and consumes 528 μW. Measurement results show inductance values in the range of 150 μH to 1.5 mH can be achieved.

Graduation Semester

2017-08

Type of Resource

text

Permalink

http://hdl.handle.net/2142/98402

Copyright and License Information

This thesis is beerware licensed: As long as you retain this notice you can do whatever you want with this stuff. If we meet some day, and you think this stuff is worth it, you can buy me a beer in return.

Owning Collections