Patent ID: 6914472
Filing Date: 2005-07-05
Classification: H03K,H04L

Abstract:
1. A phase modulating system for modulating the phase of a signal based on a digital control signal, said phase modulating system comprising: signal input for receiving a signal which is to be modulated; connected to said signal input x delay elements connected to each other in series, with x≧1, each of said x delay elements applying a delay of D to a respectively received signal; connected to said signal input y delay elements connected to each other in series, with y≧1, each of said y delay elements applying a delay of D*(x+1) to a respectively received signal; connected to an output of at least one of said x delay elements at least one further delay element, wherein in case more than one further delay element is connected to the output of any of said x delay elements, said respective further delay elements being connected to each other in series, each of said further delay elements applying a delay of D*(x+1) to a respectively received signal; and a switching component selecting the signal at one of the signal input and the output of one of the x, y and further delay elements in accordance with said digital control signal as a phase modulated output signal.