CIRCUIT FOR INTRODUCING SIGNAL JITTER

摘要

A circuit that introduces a calibrated amount of jitter and/or amplitude variation into a signal. By generating a signal with some predetermined amount of variation, signal consuming equipment may be tested to verify that it can properly extract the information from the signal, despite the presence of such variation. The circuit includes a signal propagation channel through which a signal may propagate. However, to introduce signal variation, the signal propagation channel passes close to electromagnetic interference generation circuitry. A calibration circuit has one or multiple settings that sets on or more values of parameters of the electromagnetic interference generation circuitry. During calibration, the parameters are adjusted until desired variation is detected, and which point the calibrated values are set and associated with that signal variation. This may be repeated for multiple calibration values and multiple settings. The ability to handle signals of different variances may then be accomplished.

主权项

1. A circuit comprising:
a signal source; an output signal port; a signal propagation channel between the signal source and the output signal port; electromagnetic interference generation circuitry that is physically positioned within a proximity to the signal propagation channel on the circuit that enables electromagnetic interference generated by the electromagnetic interference generation circuitry to interact with the signal propagation channel to introduce jitter into an electronic signal generated by the signal source as propagates through the signal propagation channel to the output signal port; and calibration circuitry configured to have a plurality of possible settings, each of at least some of the settings resulting in a different amount of the electromagnetic interference generated by the electromagnetic interference generation circuitry, in order to control the amount of jitter introduced into the electronic signal by the electromagnetic interference generation circuitry.