Stmicroelectronics S.r.l.

Mojtaba Mohammadi Abdevand

Paolo Pulici

Piero Malcovati

Enrico Mammei

Dario Livornesi

Edoardo Bonizzoni

Francesco Piscitelli

Alessio Emanuele Vergani

According to an embodiment, a circuit includes a biasing and a low-frequency recovery circuit. The biasing circuit includes a voltage digital to analog converter (V-DAC), a differential difference amplifier coupled to the V-DAC, a common-mode feedback (CMFB) amplifier coupled to the differential difference amplifier, and a first pair of transistors arranged as a high-impedance structure and coupled to the differential difference amplifier and the CMFB amplifier. The low-frequency recovery circuit includes a current digital to analog converter (C-DAC), a second pair of transistors arranged as a high-impedance structure and coupled to the first pair of transistors, a pair of resistors having a resistance value equal to half a resistance of the resistive sensor, the pair of resistors arranged between the second pair of transistors and coupled to the C-DAC, and a gain circuit coupled to shared nodes between the second pair of transistors and the pair of resistors.

Circuit for biasing an external resistive sensor

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Pavia, Italy

Mojtaba Mohammadi Abdevand