Author： Jahan M. Holleman Jeremy
Publisher： Springer Publishing Company
ISSN： 0925-1030
Source： Analog Integrated Circuits and Signal Processing, Vol.77, Iss.3, 2013-12, pp. : 549-556
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Abstract
This paper presents the design and performance of an ultra-low-power 4/5 frequency divider based on a CMOS ring oscillator. Measurements show a 198 % locking range (6 MHz–1.3 GHz) for both division ratios at room temperature, covering the MICS band and 433 and 915 MHz ISM bands while consuming only 4.07 μW from a 1 V supply at 400 MHz. The wide locking range and low power consumption makes it very suitable for ultra-low-power wireless systems. The divider is fabricated in a 90 nm CMOS process and occupies 45 μm2 of area.
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