Economical transducers of environmental parameters to a frequency for the end devices of IoT

Викулин, И. М.; Gorbachev, V. E.; Gorbacheva, Anna; Krasova, Victoria; Polakov, Sergey

doi:10.1109/aiact.2017.8020059

Cited by 2 publications

(1 citation statement)

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“…The internet of things (IoT) is a new paradigm, which connects any physical objects embedded with ambient computational intelligence to each other such that these objects can recognize others and exchange collected data [ 1 , 2 , 3 ]. With the advent of the Internet of Things, there has been an increasing demand on the transducers that are able to perform diverse functions such as sensors, actuators, and radio frequency identification tags, for a wide variety of applications including communication, imaging, display, finance, data centers, transportation, health-care, and biomedical devices [ 4 , 5 , 6 , 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

A Compact Operational Amplifier with Load-Insensitive Stability Compensation for High-Precision Transducer Interface

Yang

Chung

2018

Sensors

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High-resolution electronic interface circuits for transducers with nonlinear capacitive impedance need an operational amplifier, which is stable for a wide range of load capacitance. Such operational amplifier in a conventional design requires a large area for compensation capacitors, increasing costs and limiting applications. In order to address this problem, we present a gain-boosted two-stage operational amplifier, whose frequency response compensation capacitor size is insensitive to the load capacitance and also orders of magnitude smaller compared to the conventional Miller-compensation capacitor that often dominates chip area. By exploiting pole-zero cancellation between a gain-boosting stage and the main amplifier stage, the compensation capacitor of the proposed operational amplifier becomes less dependent of load capacitance, so that it can also operate with a wide range of load capacitance. A prototype operational amplifier designed in 0.13-μm complementary metal–oxide–semiconductor (CMOS) with a 400-fF compensation capacitor occupies 900-μm2 chip area and achieves 0.022–2.78-MHz unity gain bandwidth and over 65∘ phase margin with a load capacitance of 0.1–15 nF. The prototype amplifier consumes 7.6 μW from a single 1.0-V supply. For a given compensation capacitor size and a chip area, the prototype design demonstrates the best reported performance trade-off on unity gain bandwidth, maximum stable load capacitance, and power consumption.

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