Abstract: Disclosed is a LADAR system and a method for operating same. The LADAR system includes circuitry for generating the electrical signal with an optical signal detector using N discrete samples; a bank of M parallel sample/hold circuit unit cells individual ones of which operate with an associated sample/hold clock, where each sample/hold clock is shifted in time by a fixed or programmable amount ?t relative to a sample/hold clock of an adjacent sample/hold circuit unit cell; and further includes circuitry for sequentially coupling a sampled value of the electrical signal from a first output of individual ones of at least some of the M parallel sample/hold circuit unit cells to an analog to digital converter circuit. Each of the M parallel sample/hold circuit unit cells has a second output for outputting a digital signal for indicating the state (low or high) during a time that the associated sample/hold clock allowing for time of arrival determination.

Abstract: An improved digital-to-analog conversion circuit (10) comprises digital circuitry (12) for receiving digital input signals from a digital input signal source, conversion circuitry (42) receiving the digital input signals and producing analog output signals and analog output circuitry (44) for sending analog output signals to an analog output signal load. The conversion circuit (10) includes calibration circuitry (46) that samples analog output signals from analog output circuitry (44) and includes a reference signal source (52) for producing a plurality of reference signals. A comparator (50) compares a predetermined aspect of the analog output signals to the reference signals to produce therefrom a plurality of difference signals. Correction circuitry includes error detection circuit (95) that includes a successive approximation register (62) and a digital controller (66) for receiving the difference signals and a digital interpolator (26) for generating a plurality of correction signals.