Programmable multi-modulus frequency divider

Abstract

It is a programmable multi-module frequency divider, which is to divide one source impulse frequency to output the aim impulse according to multiple update divisor signals. The divider comprises at least one first frequency divider units crossing with each other and simultaneously repeats each operations of the divider according to a repeat signal to trigger the loaded update divisor signal operation according to the repeat signals.

Description

technical field [0001] The invention relates to a frequency divider, in particular to a programmable multi-modulus frequency divider. Background technique [0002] The frequency division circuit is a very important part of the frequency synthesizer. It is used to divide an original pulse into a target pulse, and the frequency of the target pulse is the result of dividing the frequency of the original pulse by a divisor value. As is well known to those skilled in the art, a general frequency divider circuit (Frequency Divider) is composed of multiple dual-mode frequency division units connected in series (Cascade), and each frequency division unit is based on a corresponding divisor signal , to select the frequency division mode to be performed. The divisor value range that the frequency divider can handle is limited by the number of the frequency division units. The more the frequency divider units are, the greater the divisor value range that the frequency divider can ope...

AI Technical Summary

Problems solved by technology

In this way, in the frequency division cycle of the programmable frequency divider, some frequency units operate according to the new divisor signal, while other frequency division units operate according to the old divisor signal, thus resulting in the frequency division cycle After the completion, the frequency of the target pulse output after the frequency division is wrong

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