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INDONESIA
Indonesian Journal of Electrical Engineering and Computer Science
Published by Institute of Advanced Engineering and Science
ISSN : 25024752     EISSN : 25024760     DOI : -
Core Subject :
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Articles 63 Documents
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Search results for , issue "Vol 14, No 2: May 2019" : 63 Documents clear
Electronic controlled CMOS inductor with patterned metal ground shields for fine inductance tuning application Nur Syahadah Yusof; Norlaili Mohd Noh; Jagadheswaran Rajendran; Asrulnizam Abd Manaf; Shukri Korakkottil Kunhi Mohd; Yusman Mohd. Yusof; Harikrishnan Ramiah; Mohamed Fauzi Bin Packeer Mohamed
Indonesian Journal of Electrical Engineering and Computer Science Vol 14, No 2: May 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v14.i2.pp937-948

Abstract

This paper is on an inductance fine tuning technique which benefits from the idea of varying the number of metal plates of an inductor’s pattern ground shield (PGS) shorted to ground to change its magnetic fields. This technique is unique because the geometry and physical shape of the inductor remains untouched from its form in the process design kit (PDK) while the inductance is being tuned. The number of metal shields shorted to ground was controlled by an electronic circuit which consists of analog-to-digital converters and active switches. Both Sonnet EM simulator and Cadence Virtuoso were used for the inductor and circuit simulations. From the simulation, it was found that the inductance increased while the Q-factor decreased as more metal shields were shorted to ground. For instance, at 1.6 GHz, the simulated inductance was 8.8 nH when all metals were floated and 9.4 nH when all metals were shorted to ground. On the other hand, the simulated Q-factor was 10.4 when all metals were floated and 9.8 when all metals were shorted to ground. From both simulation and measured results, both inductance and inductance tuning range increased with frequency. From the measured results too, the inductance observed was 9.4 nH at 1.6 GHz, 10.8 nH at 2 GHz, and 13.5 nH at 2.5 GHz when all the metal shields were shorted to ground. The inductance tuning range was 6.2% at 1.6 GHz, 12.5% at 2 GHz, and 20% at 2.5 GHz. The measured results showed good correlation with the simulated results trend, but with smaller value of inductance, inductance tuning range and Q-factor.
Fine grained medical image fusion using type-2 fuzzy logic Ramya H.R; B K Sujatha
Indonesian Journal of Electrical Engineering and Computer Science Vol 14, No 2: May 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v14.i2.pp999-1011

Abstract

In recent years, many fast-growing technologies coupled with wide volume of medical data for the digitalization of that data. Thus, researchers have shown their immense interest on Multi-sensor image fusion technologies which convey image information based on data from various sensor modalities into a single image. The image fusion technique is a widespread technique for the diagnosis of medical instrumentation and measurement. Therefore, in this paper we have introduced a novel multimodal sensor medical image fusion method based on type-2 fuzzy logic is proposed using Sugeno model. Moreover, a Gaussian smoothen filter is introduced to extract the detailed information of an image using sharp feature points.Type-2 fuzzy algorithm is used to achieve highly efficient feature points from both the b images to provide high visually classified resultant image. The experimental results demonstrate that the proposed method can achieve better performance than the state-of-the- art methods in terms of visual quality and objective evaluation.
-81dB PSRR regulated cascode fully MOS bandgap reference for power management in RF energy harvesting systems M. K.Zulkalnain; N. A.Kamsani; R. M.Sidek; F. Z.Rokhani; S. J.Hashim; M. N.Hamidon
Indonesian Journal of Electrical Engineering and Computer Science Vol 14, No 2: May 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v14.i2.pp706-714

Abstract

In the midst of technological advance where everything is connected via the internet, IoT is emerging as a potential solution to everything, ranging from health wearables to smart city. An RFEH power management system has promising benefits that could further improve the powering of IoT devices as it has potential for clean energy as well as other advantages which consists of a rectifier, bandgap reference and LDO as the main core. However, the main challenge is supplying clean and low noise power to sensitive circuits such as low power sensors, VCOs and PLLs. A high PSRR bandgap reference that rejects noise at the power supply is needed so that the circuitry powered by RFEH systems would be able to function properly. This paper presents a bandgap with MOS PTAT and CTAT extraction achieving a PSRR of -81dB at a Vref of 0.415V was designed on 130nm CMOS technology targeting IoT RFEH devices that operate at sub-threshold and near-threshold region that exhibits improvement over the base design.

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