Patent ID: 8278979
Filing Date: 2012-10-02
Classification: H03K

Abstract:
1. A controller for controlling voltage, the controller comprising: a first delay chain of N replica delay elements, wherein each of said replica delay elements includes a first logic element configured to receive first and second control voltages and in accordance therewith control a rise time and a fall time, respectively, of said first logic element, and a second logic element coupled to an output of said first logic element; a second delay chain of N reference delay elements, wherein each of said reference delay elements is configured to provide a delay that is equal to a delay in one of said replica delay elements minus a delay of said first logic element; and a first phase detector and loop filter circuit configured to receive an inverted output signal from said first delay chain and an output signal from said second delay chain and in accordance therewith, adjust said first control voltage until said output signals are aligned.