초록 ▼

A logic isolation circuit with high transient immunity has a link-coupled transformer assembly for providing isolation. An input circuit provides pulses that indicate rising and falling edges, and an output circuit on the isolated side of the barrier converts the signal with pulses back into a digit

A logic isolation circuit with high transient immunity has a link-coupled transformer assembly for providing isolation. An input circuit provides pulses that indicate rising and falling edges, and an output circuit on the isolated side of the barrier converts the signal with pulses back into a digital logic signal with rising and falling edges. An interrogation feature allows the output to be updated frequently. The logic isolator can be provided in a single module for use in a process control board, or it can be provided as multiple parts for mounting on a circuit board.

대표청구항 ▼

[ What is claimed is:] [13.] A logic isolator for isolating digital logic signals comprising:an input circuit for detecting rising and falling edges in an input digital logic signal, and for providing an output signal indicative of relative locations of the rising and falling edges;a transformer ass

[ What is claimed is:] [13.] A logic isolator for isolating digital logic signals comprising:an input circuit for detecting rising and falling edges in an input digital logic signal, and for providing an output signal indicative of relative locations of the rising and falling edges;a transformer assembly with a shielded single transformer for receiving the output signal from the input circuit and for providing a signal similar to the signal received by the transformer; andan output signal circuit for receiving the signal from the transformer and for providing an output signal with rising and falling edges in the same relative locations as the rising and falling edges in the input digital logic signal.