Abstract: A subinterval sampler is provided for sampling short duration analog input signal pulses with slower speed processing hardware than would otherwise be required. The peak value of the input signal is detected during each sampling interval regardless of the absolute times at which peaks occur, an no input signal peak is missed. A pair of parallel peak detectors have active intervals overlapped by a duration longer than the rise time of the peak detectors, and have nonconcurrent inactive intervals for clearing. The outputs of the peak detectors are alternately switched into sample and hold circuitry at a switching rate equal to the sampling rate but staggered such that switching times occur midway in the sampling intervals.