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A Floating-Gate-Based Programmable CMOS Reference
DOI:10.1109/TCSI.2008.925351.png)
Abstract
En 中文
We describe a compact programmable CMOS reference, where the reference is determined by the charge difference between two floating-gate transistors, thereby making the reference insensitive to temperature and other environmental effects. Using floating-gate transistors adds programmability making a wide range of reference voltages possible with negligibie long-term drift. A prototype circuit has been implemented in a 0.35-mu m CMOS process, and reference voltages ranging from 50 mV to 0.6 V have been achieved. We demonstrate a voltage reference programming accuracy of +/- 40 mu V. Experimental results indicate a temperature sensitivity of approximately 53 mu V/degrees C for a nominal reference voltage of 0.4 V over a temperature range of -60 degrees C-140 degrees C.
Keywords:
Current reference
floating-gate transistors
voltage reference
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