A CMOS Rail-to-Rail Linear VI-Converter
نویسندگان
چکیده
A linear CMOS VI-converter operating in strong inversion with a commonmode input range from the negative to the positive supplly rail is presented. The circuit consists of three linear VI-converters based on the difference of squares principle [l-31. Two of these perform the actual V to I conversion, while the third changes the bias currents of the first two in response to changes in the input common-mode level. The resulting circuit has a large signal transconductance which is constant to within 3 % over the entire common-mode input range. I t can operate from a single supply voltage of 2.2Volt.s.
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