STRUCTURE OF DELTA SIGMA DIVIDER

摘要

PURPOSE: A structure of a delta sigma divider is provided to obtain the capacity to synthesize the broadband frequency and maximize an effect of a delta sigma method by adding an output value of a delta sigma modulator to an external input value to modulate a value of a swallow counter. CONSTITUTION: A delta sigma modulator(41) is used for receiving a frequency and an external input value. A swallow adder block(40) is used for adding an external input value to an output value of the delta sigma modulator. A program register block(37) is used for storing an output value of the swallow adder block. A pulse swallow counter block(34) is formed with a dual modulus prescaler, a program counter, and a swallow counter in order to divide an input frequency according to a stored value of the program register block.