Title :
Dual mode Digital Pulse Modulation (PWM & PFM) generator ASIC for Laser Electro-Optic Q-switching application
Author :
Al-Muraeb, Ahmed M. ; Abdel-Aty-Zohdy, Hoda S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Oakland Univ., Rochester, MI, USA
Abstract :
Due to the wide applications of DPWM (Digital Pulse Width Modulation) /DPFM (Digital Pulse Frequency Modulation) in the industry, a 4-bit Dual Mode (PWM/PFM) Digital Pulse Modulation (DMDPM) 40-pin 0.5 μm-process CMOS chip is designed, fabricated, and tested. The chip has an optimized occupation area (of the un-scaled chip) of (1105λ × 1080λ = 331.5μm × 324μm) ~ 13.26% of the allowed area (3000λ × 3000λ), and a maximum frequency of 150 MHz. Beside simulation results, experimental chip test results are presented as well. An application of proposed scheme is applied in Laser Electro-Optic Q-switching. The advantage of wide range of pulse durations/frequencies offered by our chip, is utilized to electro-optically modulate a Laser light. Our dual mode DMDPM chip would further allow to modulate various Lasers meeting their pump pulse duration requirement.
Keywords :
CMOS integrated circuits; Q-switching; application specific integrated circuits; electro-optical switches; integrated optoelectronics; pulse frequency modulation; pulse width modulation; CMOS chip; DMDPM chip; DPFM generator ASIC; DPWM generator ASIC; digital pulse frequency modulation; dual mode digital pulse width modulation; experimental chip test; laser electro-optic Q-switching; laser light; optimized occupation area; pump pulse duration requirement; size 0.5 mum; word length 4 bit; Clocks; Frequency modulation; Laser excitation; Laser modes; Pulse width modulation; Pump lasers; ASIC; DPFM; DPWM; Lasers; Q-switching; electro-optic;
Conference_Titel :
Circuits and Systems (MWSCAS), 2014 IEEE 57th International Midwest Symposium on
Conference_Location :
College Station, TX
Print_ISBN :
978-1-4799-4134-6
DOI :
10.1109/MWSCAS.2014.6908561
