Joseph A Lebel, Charles D Albrecht, Kar Kui Mark, Michael Ugenti: Software reconfigurable instrument with programmable counter modules reconfigurable as a counter/timer, function generator and digitizer. Grumman Aerospace Corporation, Scully Scott Murphy & Presser, January 14, 1992: US05081297 (30 worldwide citation)

A reconfigurable signal processing device that includes a plurality of programmable modules that are reconfigurable to perform one of a plurality of selected signal processing functions. The modules may be reconfigured under software control to act as one of a time base generator, a counter, an accu ...

Charles D Albrecht, Edward J McCormick: Programmable function generator. Grumman Aerospace Corporation, Morgan Finnegan Pine Foley & Lee, February 16, 1982: US04316259 (15 worldwide citation)

A programmable function generator which provides three independent signal sources for use as test stimuli in automatic test equipment is disclosed.