UNIVERSAL DEVICE TO INPUT UNIPOLAR AND DIFFERENTIAL DIGITAL SIGNALS Russian patent published in 2012 - IPC H03K19/00 

FIELD: electricity.

SUBSTANCE: universal device for input of unipolar and differential digital signals comprises a differential receiver, comprising two amplifiers-limiters for receipt of direct and inverse input signals and a shaper of an output logical signal, besides, the device includes a trigger, a delay element, a resistor divider, a controlled switch and two comparators for generation of logical signals from a direct input differential signal and accordingly from a unipolar input signal, besides, inputs of both comparators are connected to the direct input of the differential receiver, the input of the clock signal of the trigger is connected to the output of the first comparator via the delay element, the data input of the trigger is connected to the output of the second comparator, the input of the resistor divider is connected to the direct output of the trigger, the output of the resistor divider is connected to the input of the controlled switch, the output of the controlled switch is connected to the inverse input of the differential receiver, and the input of the controlled switch control is connected to the inverse output of the trigger.

EFFECT: provision of input of both unipolar and differential digital signals with automatic detection of input signal type and establishment of according input modes.

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