Divider with dual modulus prescaler for phase locked loop frequency synthesizer

摘要

A high frequency divider suitable for use in a frequency synthesizer using a dual modulus prescaler and two counters to achieve high speed and low current drain. The input signal is alternately divided by one of the two moduli in the prescaler and then alternately divided by one of the two counters. Each of the two counters is reset while the other is counting thereby reducing circuit complexity and increasing circuit speed.