This paper proposes two fully-integrated cap-less (i. e. without external capacitor) preamplifiers for silicon microphones. Proper dc biasing of the preamplifier is obtained with two solutions to implement a large feedback resistance (in the GO range), based on a switched resistor and a transistor in the off state, respectively. Both solutions have been implemented in a 0.18-μm CMOS technology and consume 230 μW from a single 1.8-V power supply. Both preamplifiers achieve a flat frequency response between 20 Hz and 20 kHz with a programmable gain ranging from -6 dB to +18 dB, and an integrated input referred noise (IIRN) lower than -100 dBV. The achieved total harmonic distortion (THD) is lower than -100 dB and -80 dB for the switched-resistor and the off-transistor preamplifiers, respectively, independently of the gain and in spite of the single ended configuration.
Croce, M., De Berti, C., Crespi, L., Malcovati, P., & Baschirotto, A. (2017). Cap-less audio preamplifiers for silicon microphones. In Proceedings of IEEE Sensors (pp.1-3). Institute of Electrical and Electronics Engineers Inc..
Citazione: | Croce, M., De Berti, C., Crespi, L., Malcovati, P., & Baschirotto, A. (2017). Cap-less audio preamplifiers for silicon microphones. In Proceedings of IEEE Sensors (pp.1-3). Institute of Electrical and Electronics Engineers Inc.. |
Tipo: | paper |
Carattere della pubblicazione: | Scientifica |
Presenza di un coautore afferente ad Istituzioni straniere: | Si |
Titolo: | Cap-less audio preamplifiers for silicon microphones |
Autori: | Croce, M; De Berti, C; Crespi, L; Malcovati, P; Baschirotto, A |
Autori: | BASCHIROTTO, ANDREA (Ultimo) |
Data di pubblicazione: | 2017 |
Lingua: | English |
Nome del convegno: | 15th IEEE Sensors Conference, SENSORS 2016 |
ISBN: | 9781479982875 |
Appare nelle tipologie: | 02 - Intervento a convegno |