Patent ID: 6049219
Filing Date: 2000-04-11
Classification: G01R

Abstract:
The operation perturbance-limited method of waveform-analyzing signals of microwave and millimeter wave frequency at circuit nodes internal to an operating integrated circuit electronic device, said method comprising the steps of:selecting physical and electrical characteristics of an input-ungrounded, high impedance, broadband signal-attenuating, resistive input portable test probe and a transmission line member connected thereto to provide a combined test probe and transmission line resonance frequency below a waveform analyzing frequency selected for said operating integrated circuit electronic device;communicating, via said input-ungrounded, high impedance, broadband signal-attenuating, resistive input portable test probe, voltage signals from a first selected internal signal node of said operating microwave and millimeter wave frequency integrated circuit electronic device to a transition analysis electronic circuit apparatus;calibrating out of said input-ungrounded, high impedance, broadband signal-attenuating, resistive input portable test probe-communicated operating microwave and millimeter wave frequency integrated circuit electronic device selected internal signal node voltage signals resonance peak effects attributable to said input-ungrounded, high impedance, broadband signal-attenuating, resistive input portable test probe and transmission line member connected thereto;remaining microwave and millimeter wave frequency signals being identified as first processed signals;determining, by harmonic frequency sampling of said first processed signals within said transition analysis electronic circuit apparatus, a fundamental frequency through Nth harmonic frequency-related array of voltage magnitude and phase data, data characteristic of said operating integrated circuit selected internal signal node voltage signals; andconstructing, from said array of fundamental frequency through Nth harmonic frequency-related magnitude and phase data, a time domain representation of a waveform characteristic of said selected signal node voltage signals.