Patent ID: 6834094
Filing Date: 2004-12-21
Classification: H03K

Abstract:
A high-frequency multi-selection prescaler adapted for a high-frequency divider circuit, comprising:a first frequency divider for receiving an input signal and generating an output signal with a divided frequency through a frequency division process; a second frequency divider connected to said first frequency divider for performing a further frequency division process on said output signal from said first frequency divider on the basis of a selection switching means having a plurality of selection signals and a plurality of AND gates; a module control for performing a logic operation on said plurality of selection signals and an external control signal (MC) by at least one OR gate and sending an operation result to said first frequency divider to control said divided frequency of said first frequency divider; and an output selection circuit connected to said second frequency divider for performing a signal output selection in accordance with said plurality of selection signals; whereby, through the combination of said first frequency divider and said second frequency divider, along with the control of said module control, a divider circuit having expanded frequency selections is formed to provide multiple divided frequencies.