Sohiful Anuar Zainol Murad
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Preferred name
Sohiful Anuar Zainol Murad
Official Name
Sohiful Anuar, Zainol Murad
Alternative Name
Murad, S. A.Zainol
Murad, S. A.Zainol
Anuar, Zainol Murad Sohiful
Zainol Murad, S.A.
Sohiful, Z. M.A.
Main Affiliation
Scopus Author ID
16643180100
Researcher ID
I-1082-2019

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  • Publication
    Pseudo-Differential Transconductor Circuit for a Low Supply Voltage Application
    ( 2021-07-26)
    Mohd Sabari N.D.I.B.
    ;
    Abu Bakar F.B.
    ;
    Azizan A.B.
    ;
    Sohiful Anuar Zainol Murad
    This paper presents a pseudo-differential transconductor circuit. Operational Transconductance Amplifier (OTA) is a standout amongst the most functional and major circuit elements within the analog and mixed-signal circuit style. It is additionally one of the more intricate cells to plan. Due to the rising performance of new generation MOS transistors, the complexity of integrated circuit is continuously increasing with time. The reduction in component sizing is one of the main reasons for integrating millions of transistors into a single chip. There is a great demand for battery powered equipment like a laptop, wireless communication, and implantable devices. In all these devices, it is essential to maintain low power dissipation to achieve good battery life and weight. The main feature of the research is to design a pseudodifferential transconductor circuit for a low supply voltage application with the targeted gain greater than 20 dB using Mentor Graphics software. The designs are done in Pyxis Schematic and Pyxis Layout using eldo platform for simulation to simulate the functionality of the transconductor circuit. From the postlayout simulation, with supply voltage of 1.2 V, the gain of 30 dB with cut-off frequency of 398 kHz has been achieved.
  • Publication
    Design of 5 V DC to 20 V DC switching regulator for power supply module
    ( 2017)
    Nor Afiqah Azmi
    ;
    Sohiful Anuar Zainol Murad
    ;
    Azizi Harun
    ;
    Rizalafande Che Ismail
    ;
    Mohd Nazrin Md Isa
    ;
    M. A. Zulkifeli
    This paper presents the design of 5 V to 20 V DC switching regulator for power supply module. A voltage multiplier which consists of cascaded diode-capacitor combination is used in order to obtain a high voltage power supply. Due to power loss that has occurred in a stray of component arrangement, the proposed design employs a pulse width modulation (PWM) controller circuit with an inclusion of a capacitor, diode, and inductor components. The input supply of 5 V DC to LT1618 controller circuit has produced 20.35 V based from simulation results. Meanwhile, the measurement results of 19.36 V are obtained and the feedback signal is required for the purpose of stabilizing the output. The proposed design can reduce the components as well as the PCB size, thus minimizing the overall cost of making a switching regulator for power supply module. © 2017 Author(s).
  • Publication
    Single wall carbon nanotubes dispersion study of different dye molecules and chitosan
    ( 2017-09-26)
    Muhammad Mahyiddin Ramli
    ;
    Siti Salwa Mat Isa
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Sohiful Anuar Zainol Murad
    Carbon Nanotubes (CNTs) is known for their hydrophobicity ability. However, this ability can become the bottleneck for the application of CNTs where a highly dispersion of materials are needed. In this project, different dispersing agents were investigated namely dye molecules and chitosan. Three different dyes are studied with different concentration, including 0.05 % of chitosan. The dispersion quality is determined by examining through UV-Vis-NIR. The best dispersion quality investigated here is when the concentration of dye molecules is higher, which is around 2.5 mM.
  • Publication
    UWB CMOS low noise amplifier for mode 1
    ( 2017-07-02)
    Tun Zainal Azni Zulkifli
    ;
    Arjuna Marzuki
    ;
    Sohiful Anuar Zainol Murad
    This paper presents an ultra-wideband 3.1-4.9 GHz low noise amplifier (LNA) employing a sixth-order bandpass Chebyshev filter. The LNA has been designed using Silterra 0.18 μm CMOS technology at 1.8 V power supply. The simulation shows that the LNA attains a power gain of 14.1 dB with an input reflection coefficient less than -10 dB in frequency range of interest, a noise figure of 4.29 dB at 3.8 GHz, gain flatness of ±0.25 dB, a 1 dB compression point of -17.67 dBm, -6.90 dBm for IIP3 and power dissipation of 4.5 mW excluding the buffer stage.
  • Publication
    Machine vision for laser defect in PV solar modules
    ( 2016)
    R. Shuaimi
    ;
    Rizalafande Che Ismail
    ;
    Mohd Nazrin Md Isa
    ;
    Sohiful Anuar Zainol Murad
    This paper presents a new methodology in inspection on laser scribe defect of PV thin film solar modules. The work focuses on the application of machine vision as an inspection tools which has successfully integrated in other manufacturing environment as pattern recognition utility. Compared to manual inspection by human, machine vision system could offer better measurement accuracy as scribe defects are extremely hard to detect due to their small sizes and complexity of the detection process. Studies were made to identify machine vision system screening capabilities to define different scribe defect by their inspection criteria. Current result with paper and broad samples indicates that the propose system can be used effectively to replace human evaluators that currently employs in manufacturing quality control. © 2016 IEEE.
  • Publication
    Electrical conductivity (EC) sensing system for paddy plant using the internet of things (IoT) connectivity
    ( 2020-01-08)
    Othaman N.N.C.
    ;
    Mohd Nazrin Md Isa
    ;
    Sohiful Anuar Zainol Murad
    ;
    Azizi Harun
    ;
    Shaiful Nizam Mohyar
    This paper presents the design and development of an IoT-based electrical conductivity system for measuring paddy soil nutrients. Relationship between electrical conductivity (EC) and the influence of soil temperature in precision farming will be discussed. In this work, the EC algorithm was modelled and verified using MATLAB and realized on Node MCU (ESP8266) microcontroller. Results showed that the measured data from the developed system is closed to the calibration solution conductivity that is 1.413mS/cm and 12.88mS/cm. It is also noted that the recorded electrical conductivity value increases with temperature.
  • Publication
    Modified CMFB circuit with enhanced accuracy for data converter application
    ( 2013)
    Mohd Fairus Ahmad
    ;
    Sohiful Anuar Zainol Murad
    ;
    Mukhzeer Mohamad Shahimin
    ;
    Shamsul Amir Abdul Rais
    ;
    Ahmad Fariz Hasan
    Enhanced feedback voltage of common mode feedback (CMFB) circuit is designed in this work for CMOS data sampling application using 0.18-μm Silterra process technology. The double error detecting point circuit is employed to associate with the feedback point in order to prevent the undesired voltage common mode at the output of operational transconductance amplifier (OTA). The PMOS input transistor for injecting the common mode voltage is used to fit in the limitation of voltage division in low power design. The feedback voltage is strongly pushed to have a stable value as to make the outputs of differential amplifier circuit swing at a nearly constant voltage at 1.2 V for enhancing accuracy of data converter.
  • Publication
    Ultra-Low Power 0.55 mW 2.4 GHz CMOS Low-Noise Amplifier for Wireless Sensor Network
    ( 2022-01-01)
    Sohiful Anuar Zainol Murad
    ;
    Azizan A.
    ;
    Sapawi R.
    ;
    Zulkifli T.Z.A.
    This paper describes the design topology of two-stage ultra-low power low noise amplifier (LNA) using the forward body bias technique for wireless sensor network (WSN) application. The proposed design employs CMOS 0.13-µm technology at 2.4 GHz frequency. The LNA consumes low power from the forward body bias technique at the first and the second stages. The threshold voltage of the transistor can be lowered using the forward body bias technique. Two stages are implemented in order to enhance the gain while obtaining low power consumption for overall circuit. The measurement results show that the LNA consumes a total power of 0.55 mW at supply voltage 0.55 V. The input return loss (S11) and the output return loss (S22) is 10 and 12 dB, respectively. A gain of 12 dB, noise figure (NF) of 5.9 dB and input third-order intercept point (IIP3) of −3 dBm are achieved.
  • Publication
    Asas Peranti dan Pengujian Litar Elektronik
    (Penerbit UniMAP, 2016)
    Sohiful Anuar Zainol Murad
    ;
    Mohd Nazrin Md Isa
    ;
    Ili Salwani Mohamad
    ;
    Mohd Natashah Norizan
    Buku ini membincangkan asas-asas peranti elektronik dan perkara-perkara yang berkaitan dengan uji kaji litar elektronik. Sebelum pengukuran litar dijalankan, ciri-ciri peranti perlu difahami dan persediaan untuk menjalankan uji kaji boleh dimulakan. Apabila sesuatu uji kaji hendak dijalankan, litar elektronik perlu dibina di atas papan litar dan semua peralatan pengukuran perlu ditentukurkan. Kabel-kabel akan disambung di antara peralatan tadi dengan litar di atas papan reka untuk pengukuran. Tajuk-tajuk yang dibincangkan dalam buku ini disusun dan diolah dengan cara yang mudah berserta gambar rajah yang berkaitan. Isi kandungannya pula adalah ringkas dengan bahasa yang mudah difahami. Buku ini boleh dijadikan rujukan kepada pelajar yang mempelajari subjek elektronik dan uji kaji litar elektronik. Juga sesuai dijadikan panduan pengajaran dan pembelajaran kepada para pensyarah. Isi kandungannya menitikberatkan pengujian litar elektronik secara praktikal dan dapat membantu pelajar mengendalikan uji kaji di dalam subjek-subjek seperti peranti elektronik dan analog elektronik dengan lebih baik.
  • Publication
    Modelling on Impact of Building Obstruction for V2I Communication Link in Micro Cellular Environment
    ( 2021-03-01)
    Turner J.S.C.
    ;
    Shahriman Abu Bakar
    ;
    Azizi Harun
    ;
    Sohiful Anuar Zainol Murad
    ;
    Isa M.N.
    ;
    Ismail R.C.
    ;
    Ndzi D.L.
    ;
    Hashim M.S.M.
    ;
    Zuradzman Mohamad Razlan
    ;
    Wan Khairunizam Wan Ahmad
    ;
    Ramli M.F.
    In vehicular communication, signal transmission in vehicle-to-infrastructure (V2I) mode typically takes place on highways, urban, suburban and rural environments. The presence of buildings in these environments poses a challenge to model path loss (PL) due to multiple propagation mechanisms such as diffractions and reflections. However, very little attention has been made to address building effects on the performance of V2I communication links in microcell environment. This paper investigates signal propagation characteristics caused by the impact of building under micro-cellular environment whereby the base station or road-side-unit (RSU) is usually located under the rooftop of building to allow communication between RSU and mobile station or on-board-unit (OBU) on the road. The goal of this paper is to validate and discuss available path loss models based on effect of building obstruction towards RSU-OBU links specifically in residential housing area. The channel measurements are conducted based on static line-of-sight (LOS) settings of a real-world environment at 2.4 GHz frequency band using IEEE 802.15.4 XBee S2C compliant device to measure its receive power. The results are demonstrated based on received signal strength indicator (RSSI) and root mean square error (RMSE). The attenuation profile is validated and compared with suitable path loss models to evaluate best fit and most compatible model based on our measurements data and environment. The analysis shows that several V2I path loss models and V2V channel models are applicable to be used as a reference to model in LOS microcell environment with building obstruction. The finding shows that PL Urban yields the best fit V2I path loss model in terms of RMSE when compared to our measurement campaign at 2.4 GHz.
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