Patent ID: 6388595
Filing Date: 2002-05-14
Classification: G01R

Abstract:
A dithering arrangement for a digital oscilloscope, comprising:an A/D converter for providing samples of a waveform to be analyzed; a demultiplexer having an input coupled to an output of said A/D converter for receiving and demultiplexing said samples; a sample shifter having a first input coupled to an output of said demultiplexer for producing one of a plurality of a samples of said waveform within a given range of samples; programmable control signal generation circuitry responsive to predetermined dither characteristics and to a pseudo-randomly generated number for producing a range control signal relating to said range of samples; and sample selection circuitry coupled to said sample shifter and to said programmable control signal generation circuitry, and responsive to said one sample of said plurality of samples and to said range control signal for selecting a particular sample from a group of N samples for producing a dithering about an Nth sample.