Patent ID: 6633186
Filing Date: 2003-10-14
Classification: H03L

Abstract:
A die having an operating condition, the die comprising:an output bus; and a speed-locked loop to provide on the output bus a value indicative of the operating condition, the speed-locked loop comprising: an oscillator having a frequency; a counter to provide a value indicative of the oscillator frequency during a time interval; an input bus having a set of voltages representing an input bus value; a comparator to compare the counter value to the input bus value; a control functional unit coupled to the oscillator to decrease the oscillator frequency if the counter and input bus values satisfy a first relationship and to increase the oscillator frequency if the counter and input bus values satisfy a second relationships; and a speed-compensating circuit responsive to the output bus value if a ready signal indicates lock; wherein the set of voltages on the input bus is static during the time interval; and wherein the speed-locked loop provides the ready signal indicative of whether the speed-locked loop has attained lock.