A PROGRAMMABLE PIECEWISE LINEAR LARGE-SIGNAL CMOS AMPLIFIER

被引:8
作者
THOMSEN, A
BROOKE, MA
机构
[1] Microelectronics Research Center, Georgia Institute of Technology, Atlanta, GA
基金
美国国家科学基金会;
关键词
D O I
10.1109/4.179207
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A high-speed CMOS piecewise linear approximation circuit is presented that can be programmed for correction of nonlinearity after fabrication. The basic building block generates a linear segment, for which slope and position can be adjusted. Adjustments to adapt to arbitrary functions are done with floating gate devices fabricated in standard CMOS technology. The circuit is a voltage-to-current converter with an input range of the full power-supply voltage swing. In an implementation with 18 linear segments less than 0.15% error over rail-to-rail input range was achieved for a linear transfer function. Examples of strongly nonlinear transfer functions approximated to 0.5% accuracy are shown. The large-signal 3-dB frequency is 10 MHz. The implementations are done solely with 2-mum channel length devices.
引用
收藏
页码:84 / 89
页数:6
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