Document Type
Patent
Publication Date
April 2015
Patent Number
9007140
CPC
H03K 7/08(20130101),
Abstract
The present invention provides a digitally controlled, current starved, pulse width modulator (PWM). In the PWM of the present invention, the amount of current from the voltage source to the ring oscillator is controlled by the proposed header circuit. By changing the header current, the pulse width of the switching signal generated at the output of the ring oscillator is dynamically controlled, where the duty cycle can vary between 50% and 90%. A duty cycle to voltage converter is used to ensure the accuracy of the system under process, voltage, and temperature (PVT) variations. The proposed pulse width modulator is appropriate for dynamic voltage scaling systems due to the small on-chip area and high accuracy under process, voltage, and temperature variations.
Application Number
14/150,434
Recommended Citation
Kose, Selcuk and Friedman, Eby G., "Digitally controlled wide range pulse width modulator" (2015). USF Patents. 15.
https://digitalcommons.usf.edu/usf_patents/15
Assignees
University of South Florida
Filing Date
01/08/2014
