Slide-back waveform analyzer

Details Slide-back waveform analyzer Slide-back waveform analyzer

H - Electricity

03

G

354/137

H03G 3/20 (2006.01)

Patent

CA 1150842

-12- SLIDE-BACK WAVEFORM ANALYZER Abstract An apparatus for modifying a repetitive input signal by programmed variations of offset and gain such that the dynamic range of a waveform analyzer may be fully utilized is described. Initial offset and gain values are stored in a storage device. Then the input signal is applied to a summer such that the signal plus the initial offset value is applied to a digitally-programmable amplifier. The output of the amplifier is then processed by a signal analyzer where a list of offset and gain values needed to provide optimum resolution is calculated. The gain and offset data are stored in the storage device. Also calculated are the times at which offset and gain values should be applied to the input signal. The times are computed by counting clock pulses with reference to a pulse at the repetition rate of the input signal. These time data are sent to a controller which addresses the gain and offset data stored in the storage device. The addressed data are output to a DAC to produce an offset signal and to the digitally-programmable ampli- fier to alter the gain thereof.

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