Patent ID: 7719373

Claim:
A device for generating an ultra-wide bandwidth transmission signal, said device comprising: a digitally controlled variable oscillator for generating a plurality of oscillating portions; circuitry for switching on and switching off said variable oscillator at the beginning and end, respectively, of each oscillating portion, wherein said switching circuitry comprises an enable node of said variable oscillator; circuitry for setting initial conditions in said variable oscillator to impose a predefined transient and a characterizing frequency upon each start-up, wherein said initial condition setting circuitry comprises voltage nodes in between at least two cascaded stages of said variable oscillator, and wherein said initial condition setting circuitry comprises switches between ground and supply voltage on said voltage nodes; feedback circuitry to said variable oscillator for monitoring said characterizing frequency of said oscillating portions, wherein said feedback circuitry comprises detection circuitry for comparing said characterizing frequency after each oscillating portion to that of a reference and for inputting a result indicative of said comparison into storage circuitry associated with said variable oscillator; and a controller associated with said variable oscillator for updating said characterizing frequency for the next oscillating portion on the basis of said result.