Abstract
This paper discusses the design strategy of an acquisition chain for microphone input signal. First, target specifications are given. The overall strategy for the acquisition of the signal, pre-amplification and A/D conversion is then discussed, together with the main constraints, and a new architecture for the loop is proposed. The most critical analog blocks, such as first amplification stage, loop filter and biasing circuitry, are then investigated in more details, followed by measurement results.
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References
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© 2016 Springer International Publishing Switzerland
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Nys, O., Aebischer, D., Villier, S., Kunz, Y., Sun, D. (2016). Ultra Low Power Low Voltage Capacitive Preamplifier for Audio Application. In: Makinwa, K., Baschirotto, A., Harpe, P. (eds) Efficient Sensor Interfaces, Advanced Amplifiers and Low Power RF Systems. Springer, Cham. https://doi.org/10.1007/978-3-319-21185-5_9
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DOI: https://doi.org/10.1007/978-3-319-21185-5_9
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-21184-8
Online ISBN: 978-3-319-21185-5
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