Degree Type
Creative Component
Semester of Graduation
Fall 2019
Department
Electrical and Computer Engineering
First Major Professor
Degang Chen
Degree(s)
Master of Science (MS)
Major(s)
Electrical Engineering
Abstract
This creative component presents an innovative CMOS Bandgap Reference Generator topology targeting sub-ppm temperature coefficient over a wide temperature range. The proposed circuit consists of extracting VGO from the temperature characteristics of VBE. VGO is the bandgap voltage of the silicon that is extrapolated at 0K and is temperature independent over a wide range of temperature (-40°C to 125°C). Analytical constraints are carefully investigated which lead to the output voltage that is proportional to VGO when certain mismatches and opamp offsets are accurately trimmed using two temperatures trimming. The modified circuit, less number of operational amplifiers and resistors which make the circuit less complex, reduces area and power requirements. Transistor level simulations are implemented in GlobalFoundries 130nm process and achieve temperature coefficient about 3.5ppm/°C across the industrial temperature range (-40 °C to 80 °C).
Copyright Owner
Yatam Mounica
Copyright Year
2019
File Format
Recommended Citation
Yatam, Mounica, "Modified Kuijk Bandgap Reference with VGO Extraction" (2019). Creative Components. 440.
https://lib.dr.iastate.edu/creativecomponents/440
