Patent ID: 6127859
Filing Date: 2000-10-03
Classification: H03K,H03L

Abstract:
A frequency synthesizing system for the generation of a periodic output signal having selected signal periods having a first level and a second level, wherein said selected signal periods constitute a number of at least one periods of a periodic reference signal, comprising:a count compiler to generate a series of counting integers representing the number of periods of said periodic reference signal, wherein said counting integers are calculated by a method comprising the steps of:dividing of a frequency of the periodic reference signal by a frequency of one of the selected signal periods to form a quotient,decomposing of the quotient into a weighted average of a first integer and a second integer such that the first integer is a largest integer lesser than the quotient and the second integer is a value of the first integer plus one,simplifying said quotient to a mixed number having an integer and a fraction, wherein the fraction has a numerator and a denominator,creating the series of counting integers that include the first and second integers, wherein the number of counting integers is the value of the denominator and the number of second integers in the series of counting integers is the value of the numerator, and the number of first integers is the difference of the denominator and the numerator;distributing the first and second integers within subsegments of the series of counting integers in a uniform manner over the series of counting integers and appending any residual counting integers to the last of the subsegments;a count series retention table coupled to the count compiler to retain a plurality of the series of counting integers, wherein each series of counting integers represent one of the selected signal periods, and wherein a count select signal chooses one of the series of counting integers and a count signal sequentially places each counting integer of the series of counting integers on a count output;a count incrementing means to increment the count signal having a count select decoder coupled to the count select signal to determine the number of counting integers, and an output counter coupled to the periodic output signal to increment the increment count signal to a next integer in the series of counting integers; anda frequency generation means to develop the periodic output signal, including:a periodic reference signal counter coupled to the periodic reference signal and to the count output, wherein said periodic reference signal counter will create a max count signal when the number of periods of the periodic reference signal is equal to the counting integers, anda toggling means coupled to the periodic reference signal counter to alternate the periodic output signal from the first level to the second level and return to the first level at the reception of the count signal.