Importance

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Abstract

A digital-to-analog converter filter circuit includes a means for generating a blanking signal to coincide with a change in the digital signal value to the converter and an analog switch controlled by the blanking signal. The analog switch receives the analog signal from the converter and passes the signal depending on the state of the blanking signal. The blanking signal controls the switch to block passage of the analog signal for a predetermined time sufficient for the analog signal to settle after transition from a first value to a second value in response to the change in the digital input signal value. The analog switch is connected to a vector filter which receives the analog signal and transmits a delayed transition signal from the first analog signal value signal to the second value. The filter transmits the first value until the switch passes the second value upon command of the blanking signal. The delayed transistion signal represents a distortion-free reproduction of a waveform that can be routed to a display such as a cathode ray tube.

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First Claim