a multiplexed display interference compensation system for minimizing the apparent intensity modulation of an oscilloscope waveform display caused by closely spaced , individually imperceptible interruptions of the waveform required to maintain refreshed readout display is provided . the system includes a charge pump circuit for adding a current pulse to a waveform intensity control signal in response to a control signal from display multiplex control so as to increase the waveform intensity just after the interruption .