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There are two main directions in the development of modern microprocessor architectures used for System on Chip: low Power consumption and high performance. The paper presents the method for enhancing LEON3 processor IP core with superscalar ability for high-performance and low-power systems. As compared to the original LEON3 IP core, the proposed super scalar design executes is up to two instructions...
Power Optimal logic depth per pipeline stage has been explored in several papers in the literature. Simulation results on circuit models with inverters have shown that a logic depth per pipeline stage of 6 to 8 FO4 results in optimal power designs and can save good amount of power compared to a logic depth of 24 F04. In this paper we study power and logic depth trade off on ISCAS-85 benchmark circuits,...
The microfabrication technology has had a chequered history of over 50 years in the field of microelectronics. Aggressive miniaturization of microelectronic devices has resulted in faster logic circuits; & and it has also reduced their power requirements. MOSFET device dimensions have already entered the sub-100 nanometer regime. The same successful principles of microfabrication were applied...
This paper describes a comparative study of sensitivity and non-linearity of conventional and bossed diaphragm piezoresistive pressure sensor along with a performance enhanced design. The proposed structures take into consideration corner compensation to avoid distortion of the mesa structure during fabrication of bossed diaphragm structure using wet bulk micromachining. Optimum piezoresistors locations...
Physical Unclonable Functions (PUFs) are promising security primitives in recent times. A PUF is a die-specific random function or silicon biometric that is unique for every instance of the die. PUFs derive their randomness from the uncontrolled random variations in the IC manufacturing process which is used to generate cryptographic keys. Researchers have proposed different kinds of PUF in last decade,...
Pressure microsensors are very frequently used for applications encompassing a wide range of operating pressure ranges. However, it is possible to use the same pressure sensor for different operating ranges (in a limited range) with satisfactory performance. In this work, we report the possibility of using a single sensor for different pressure ranges. Operating the sensor at a lower pressure range...
Vibrational energy harvesters (VEH) are increasingly becoming the favourite approach towards making self sustained low power systems. However, obtaining frequencies close to those of ambient vibrations has been a challenge. In the current work we have proposed a novel design of the piezoelectric-VEH (P-VEH) consisting of a micro-machined thick silicon proof mass suspended with quad-beams carved out...
These days, in emergency, multiple assay operations are required to be performed at parallel. Area of a given chip as a constraint, how efficiently we can use the chip and how much parallelism can be built-in are the objectives of this paper. A typical application of an assay may characterize a sample where, say only one type of reagent and multiple samples have been considered, or vice versa, and...
This work presents a design of temperature compensated and supply regulated current reference circuit with reduced process variation at low supply voltage of 1.5 V. The supply regulation of the proposed circuit is improved by using a regulated cascode technique together with an error amplifier in the CTAT (complementary to absolute temperature) circuit. The temperature compensation is achieved by...
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