Abstract
A duty-cycled bridge-to-digital converter (BDC) for small battery operated pressure sensing systems is presented and demonstrated in two complete microsystems. By heavily duty-cycling an excitation voltage for the bridge sensor, 6000× less excitation power is consumed compared with conventional DC biasing. The excitation voltage is sampled and used to generate an ADC reference voltage to avoid line voltage fluctuation. The BDC achieves 49.2 dB SNR and 2.5 nJ conversion energy with 10.6 pJ/c.s. FOM.
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CITATION STYLE
Oh, S., Shi, Y., Kim, G., Kim, Y., Kang, T., Jeong, S., … Blaauw, D. (2019). Low-Power Resistive Bridge Readout Circuit Integrated in Two Millimeter-Scale Pressure-Sensing Systems. In Low-Power Analog Techniques, Sensors for Mobile Devices, and Energy Efficient Amplifiers: Advances in Analog Circuit Design 2018 (pp. 111–128). Springer International Publishing. https://doi.org/10.1007/978-3-319-97870-3_6
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