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This paper presents a current-mode interface circuit for capacitive sensors, with the main feature of being able to produce a differential output voltage from a single-ended capacitive sensor. The circuit has been designed combining two concepts of Folded Current Mirror and Charge Sampling. A total harmonic distortion of 34db over a 5-MHz signal bandwidth, and a DR of 48db are estimated. The circuit...
This paper describes the design of a low-noise amplifier for ultrasound receiver application. The receiver consists of a transimpedance amplifier (TIA) followed by a current feedback amplifier (CFA) and an output buffer stage to drive a 75Ω coaxial cable. The design is optimized in terms of noise and bandwidth for capacitive micromachined ultrasonic transducer (CMUT). Amplifier design issues such...
This paper describes the design of a low-noise amplifier for ultrasound receiver application. The receiver consists of a transimpedance amplifier (TIA) followed by a current feedback amplifier (CFA) and an output buffer stage to drive a 75Ω coaxial cable. The design is optimized in terms of noise and bandwidth for capacitive micromachined ultrasonic transducer (CMUT). Amplifier design issues such...
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