Patent ID: 6982607
Filing Date: 2006-01-03
Classification: H03C,H03K,H04L

Abstract:
1. An apparatus for amplitude and phase modulation of a signal comprising: a reference pulse oscillator arranged to provide a signal in the form of a series of input pulses; an input for input modulating data including desired amplitude and phase modulation; a vector logic circuit responsive to the input modulating data; two digital delay lines each coupled to said reference oscillator and each having multiple delay cells for selectively delaying respective pulses of said signal; two lookup tables each of which contains information for controlling the delay cells of a respective one of the delay lines so that the vector logic circuit controls an overall delay of the respective one of the digital delay lines using the information so as to generate therefrom a component vector which is dependent upon the input modulating data; and a summer that is coupled to the two digital delay lines and arranged to combine together the component vectors from both of the delay lines to provide an output vector.