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In digital signal processors, set-associative caches achieve low miss rates for typical applications but result in significant power consumption. Set-associative caches decrease access time by probing all the data ways in parallel with the tag lookup, although the output of only the matching way is used. The power spent access the other ways is wasted. Eliminating the power consumption by performing...
This paper designs a 10th order switched-capacitor (SC) band-pass filter and its 6th order active-RC low-pass smooth filter. The center frequency and -3dB pass bandwidth of the SC filter are respectively 50kHz and 10kHz. The filters are used in a low-frequency communication system. At low frequency, the MOSFETs have large flicker noise. This paper designs an optimized low noise full differential op...
Scratchpad memory (SPM) is commonly used in embedded system because it is more efficient than cache in both performance and energy, and it can satisfy real time requirements as well. A compiler driven method is proposed in this paper to optimally mapping code segments to SPM at runtime. The algorithm uses compiler to identify hotspots in programs based on a greedy cost model, and utilizes DMA transfer...
MEMS microphone is used in various mobile devices, notebook applications, and hearing aids. This paper analyzes the electric model of the MEMS microphone elaborately and presents a preamplifier for MEMS Microphone. The preamplifier is realized in 0.18 ??m CMOS HV technology which provides high bias voltage, impedance match and weak signal preamplifying with an area of 1050 ??m*900 ??m. The post-layout...
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