A Micropower Interface ASIC for a Capacitive 3-Axis Micro-Accelerometer

Paavola, M.; Kamarainen, M.; Jarvinen, J.A.M.; Saukoski, M.; Laiho, Mika; Halonen, K.

doi:10.1109/jssc.2007.908764

Cited by 61 publications

(33 citation statements)

References 23 publications

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“…In [8], the input bandwidth BW in of the acceleration signal is specified as being 100 Hz. The input bandwidth in [9] is either 1 or 25 Hz, depending on the operating mode.…”

Section: Specificationsmentioning

confidence: 99%

“…The maximum allowed jitter of the master clock signal can be approximated by solving Ds from (1) and using f = BW in . Hence, in order to achieve 12-bit resolution in the sensor interface of [8], which utilizes the 2.0-MHz clock signal, the maximum allowed rms jitter is 0.3 ls. Because of the limited signal available from the accelerometer that is sensed by the other sensor interface [9] using either the 24.6-or 307.2-kHz master clock signal, a higher resolution of 16 bits is required from the reference circuits.…”

Section: Specificationsmentioning

confidence: 99%

“…The frequency references used in [8,9] nominally operate from a 1.8-2.5-V and a 1.0-V supply voltage, respectively. Additionally, ±10% supply margins were taken into account in these designs.…”

Section: Specificationsmentioning

confidence: 99%

“…Compared to the conventional multivibrator the poweroptimized structure includes one additional noise source, but as will be seen later in this paper, the devices M3 and M4 make only a minor contribution to the total phase noise. The two frequency reference circuits proposed in this paper are based on the power-optimized multivibrator topology, and they provide master clock signals for two complete, fully integrated, low-power, discrete-time analog sensor interfaces [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Impulse sensitivity function-based phase noise study for low-power source-coupled CMOS multivibrators

Paavola¹,

Laiho

Saukoski

et al. 2009

Analog Integr Circ Sig Process

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In this paper, two micropower frequency references implemented with a 0.13-and a 0.25-lm CMOS process for low-power sensor applications are presented. Both circuits are based on a power-optimized source-coupled CMOS multivibrator. The 2.0-MHz frequency reference uses a nominal 1.8-2.5-V supply voltage. The 24.6/ 307.2-kHz frequency reference is an evolution of the 2.0-MHz reference and operates with a lower supply of 1.0 V and provides two active operating modes. With 1-pF load capacitances, the 2.0-MHz and 24.6/307.2-kHz frequency references typically consume 6.7 lA and 230/750 nA, respectively. After presenting experimental results relating to frequency trimming and frequency stability, this paper concentrates on the phase noise study of the proposed frequency references. The procedure used to apply the impulse sensitivity function-based (ISF) phase noise method to CMOS oscillators is described in detail. The phase noise results of both the implemented references obtained with this method agree well with the measurements.

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“…In [8], the input bandwidth BW in of the acceleration signal is specified as being 100 Hz. The input bandwidth in [9] is either 1 or 25 Hz, depending on the operating mode.…”

Section: Specificationsmentioning

confidence: 99%

Section: Specificationsmentioning

confidence: 99%

Section: Specificationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impulse sensitivity function-based phase noise study for low-power source-coupled CMOS multivibrators

Paavola¹,

Laiho

Saukoski

et al. 2009

Analog Integr Circ Sig Process

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“…Capacitive sensors are well suited to these systems because they do not consume static power. They are widely used in diverse applications to measure environmental signals, such as pressure [2], displacement [3], humidity [4], and acceleration [5]. However, their interfacing circuits can easily dominate system power, which can be as low as few nanowatts [6], and hence energy-efficient capacitance-to-digital converters (CDCs) are required.…”

Section: Introductionmentioning

confidence: 99%

Energy-Efficient CDCs for Millimeter Sensor Nodes

Jung

et al. 2016

Efficient Sensor Interfaces, Advanced Amplifiers and Low Power RF Systems

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Multiple energy-efficient CDCs are proposed for millimeter sensor nodes. Compared to the state-of-the-art, these CDCs achieves excellent energy efficiency, high SNR, and wide input range with a variety of techniques. These include correlated double sampling in front of a SAR ADC, incremental delta-sigma conversion with a zoom-in SAR converter, energy-efficient dual-slope conversion, and fully-digital iterative delay-chain discharge conversion.

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