Mohd Fairus Ahmadhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/392552024-03-28T19:28:52Z2024-03-28T19:28:52ZDevelopment of varied CMOS ring oscillator topologies in 0.13-μm CMOS technologySohiful Anuar, Zainol Murad, Dr.Rizalafande, Che Ismail, Dr.Mukhzeer, Mohamad Shahimin, Dr.Mohd Fairus, AhmadRohana, Sapawihttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/347172014-05-25T07:58:16Z2014-01-01T00:00:00ZDevelopment of varied CMOS ring oscillator topologies in 0.13-μm CMOS technology
Sohiful Anuar, Zainol Murad, Dr.; Rizalafande, Che Ismail, Dr.; Mukhzeer, Mohamad Shahimin, Dr.; Mohd Fairus, Ahmad; Rohana, Sapawi
This paper presents varied CMOS ring oscillator topologies using Silterra 0.13-µm Process. Three topologies of ring oscillators have been designed which is the single-ended ring oscillator, differential ring oscillator and ring oscillator based variable resistor for 2.4 GHz wireless applications. The proposed designs consist of five stages delay cell. The simulation results show that a single-ended ring oscillator obtained the lowest power consumption of 0.41 mW, while differential oscillator achieves phase noise of −64.44 dBc/Hz at 1 MHz offset frequency. However, ring oscillator based variable resistor did not achieve any significant improvement. The proposed design is oscillates at 2.4 GHz.
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2014-01-01T00:00:00ZModified CMFB circuit with enhanced accuracy for data converter applicationMohd Fairus, AhmadSohiful Anuar, Zainol MuradMukhzeer, Mohamad ShahiminShamsul Amir, Abdul RaisAhmad Fariz, Hasanhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/334642014-04-07T05:02:23Z2014-01-01T00:00:00ZModified CMFB circuit with enhanced accuracy for data converter application
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.
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2014-01-01T00:00:00Z