An operational amplifier has been designed, fabricated, and tested at 350°C using silicon carbide MESFET pairs and thick-film hybrid technology. The amplifier was successfully tested over the temperature range of 25-350°C. The gain of the amplifier was greater than 60 dB, the common-mode rejection ratio was greater than 55 dB, and the offset voltage varied from 139 to 159 mV over the entire temperature range. The results demonstrate the feasibility of high-temperature circuit design and assembly using this approach
Published in:
Components, Hybrids, and Manufacturing Technology, IEEE Transactions on
(Volume:16
,
Issue:
5
)
Date of Publication: Aug 1993