This circuit, calibrated to the degree Celsius scale, was found in a National Semiconductor documentation from the 1980s. The circuit makes use of components of the time uncommon today.
The amplifier shown in figure 2 is based on the MAX9715 integrated circuit from Maxim...
This stage for JFETs was found in a 1965 US publication, but is valid for modern components. |...
This circuit was found in a Japanese publication from 1971. The circuit uses components from the...