Title :
A resistor/transconductor network for linear fitting
Author :
Shi, Bertram E. ; Gao, Lina ; Lau, Kwok Kit
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong
fDate :
4/1/2000 12:00:00 AM
Abstract :
We present a continuous time analog VLSI CMOS circuit consisting of resistors and transconductors for computing the best-fit line to a set of data points. The circuit can implement standard least-squares linear fitting, as well as a form of linear fitting that is more robust to outliers. We analyze the static and transient response of the chip, and present design criteria given desired constraints on speed and accuracy. Finally, we describe the transistor level design and measurement results from a 50-input prototype fabricated using a 1.2 μm n-well process
Keywords :
CMOS analogue integrated circuits; VLSI; analogue processing circuits; continuous time systems; curve fitting; integrated circuit design; least squares approximations; parallel architectures; transient response; 1.2 micron; analog VLSI CMOS circuit; continuous time CMOS circuit; data points; design criteria; linear fitting application; n-well CMOS process; resistor/transconductor network; standard least-squares linear fitting; static response; transient response; transistor level design; Analog computers; CMOS analog integrated circuits; Fitting; Prototypes; Resistors; Robustness; Semiconductor device measurement; Transconductors; Transient response; Very large scale integration;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
