Patent ID: 6396317
Filing Date: 2002-05-28
Classification: G06F,H02M

Abstract:
A digital voltage controlled oscillator comprising:an input for receiving input signals representative of a desired frequency; at least one pulse width generator for generating pulses, each of the pulses having an amplitude and a width, the amplitudes of the pulses being substantially the same; a logic circuit in communication with the input and the pulse generator, the logic circuit being responsive to the input signals to develop an oscillating signal having a predefined waveform and the desired frequency by controlling the widths of the pulses output by the pulse generator; and a capacitor in communication with the pulse generator, the capacitor being charged by the pulses to a voltage that generally varies in accordance with the predefined waveform and the desired frequency, wherein the logic circuit includes a memory storing a table of duty cycle values defining the duty cycle of the pulses generated at predefined points along the desired waveform.