TIME-DIVISION PULSE-MULTIPLEX DIGITAL ELECTRIC SIGNAL SWITCHING CIRCUIT ARRANGEMENT

摘要

TIME-DIVISION PULSE-MULTIPLEX DIGITAL ELECTRIC SIGNAL SWITCHING CIRCUIT ARRANGEMENT Bilevel or bistatic digital electric signals are transmitted directly through a time division multiplexing (TDM) switching component asynchronously of the TDM clocking pulse train. A pulse duration modulated(PDM) electric signal or like wave is converted to a pulse amplitude modulated (PDM) electric wave having aplitude and timing components indicating a predetermined relationship to the TDM sampling period. The input PDM wave is amplitude limited by conventional circuitry and phase relationship is indicated by a ramp wave generator or a digital counter with the slope of the ramp wave or the counting rate proportional to the sampling period. Other forms of analog-to-digital converter circuitry may be substituted. The converted PAM electric wave is then passed through the switching component in conventional manner. Thereafter, the switched PAM electric wave is analyzed for reconstructing the original PDM electric signal wave. Complementary circuitry us preferably used for regenerating the signal. The upper limit on the data rate corresponds to one transition of the input electric signal to one time division sampling period of the TDM switching component.