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Energy-Efficient Smart Temperature Sensors in CMOS Technology (Hardcover, 1st ed. 2018)
Loot Price: R3,925
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Energy-Efficient Smart Temperature Sensors in CMOS Technology (Hardcover, 1st ed. 2018)
Series: Analog Circuits and Signal Processing
Expected to ship within 12 - 17 working days
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This book describes the design and implementation of
energy-efficient smart (digital output) temperature sensors in CMOS
technology. To accomplish this, a new readout topology, namely the
zoom-ADC, is presented. It combines a coarse SAR-ADC with a fine
Sigma-Delta (SD) ADC. The digital result obtained from the coarse
ADC is used to set the reference levels of the SD-ADC, thereby
zooming its full-scale range into a small region around the input
signal. This technique considerably reduces the SD-ADC's full-scale
range, and notably relaxes the number of clock cycles needed for a
given resolution, as well as the DC-gain and swing of the
loop-filter. Both conversion time and power-efficiency can be
improved, which results in a substantial improvement in
energy-efficiency. Two BJT-based sensor prototypes based on
1st-order and 2nd-order zoom-ADCs are presented. They both achieve
inaccuracies of less than +/-0.2 DegreesC over the military
temperature range (-55 DegreesC to 125 DegreesC). A prototype
capable of sensing temperatures up to 200 DegreesC is also
presented. As an alternative to BJTs, sensors based on dynamic
threshold MOSTs (DTMOSTs) are also presented. It is shown that
DTMOSTs are capable of achieving low inaccuracy (+/-0.4 DegreesC
over the military temperature range) as well as sub-1V operation,
making them well suited for use in modern CMOS processes.
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