Abstract: A method and apparatus of measuring the pulse width of electronic pulses which may have a large variation in amplitude. An electronic pulse includes a rising edge, a top and a falling edge and the method and apparatus measures a first point adjacent to the beginning of the rising edge, and measures a second point adjacent the beginning of the falling edge and measures the pulse width as the difference between the first and second points whereby the pulse width measurement is insensitive to the amplitude of the pulse width.

Abstract: A bucket brigade filter is disclosed having a feedback loop resulting in a tight comb structure filter response whereby a periodic noise and all its harmonics may be removed from a signal. Scalers featuring selectively variable scaler parameters permit prompt adaptation to changes in the noise period, rapid initialization of the filter to an operating condition and adjustable stopband widths of the filter frequency response. Sampling of the input data signal may be synchronized to the periodic variations of the noise to be eliminated from the signal.