Fixed-gain CMOS differential amplifiers with no external feedback for a wide temperature range |
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Authors: | Vratislav Michal Gérard Sou Alain J Kreisler Annick F Dégardin |
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Affiliation: | a Laboratoire de Génie Electrique de Paris, SUPELEC/LGEP; CNRS/UMR 8507; UPMC Univ Paris 06; Univ Paris Sud 11; Gif-sur-Yvette, France b Laboratoire d’Electronique et d’Electromagnétisme, UPMC Univ Paris 06/L2E/EA 2385; Paris; France |
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Abstract: | We present original CMOS amplifiers designed for the DC to 10 MHz frequency range and operating in the 70-380 K temperature range. Aimed applications concern readout circuitry to be associated with THz bolometric pixels (either high-Tc superconducting or uncooled semiconducting), which require accuracy, low noise and low power consumption. Two designs are described that both exhibit high fixed-gain (40 dB) in a feedback-free architecture, which is based on a new low-transconductance composite transistor for an accurate control of this gain. Both amplifiers have been realized in a regular 0.35 μm CMOS process and tested in the 4.2-380 K temperature range, exhibiting good agreement between designed and measured characteristics. |
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Keywords: | D Cryoelectronics Fixed-gain amplifiers CMOS D Instrumentation |
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