Patent ID: 9155254
Filing Date: 2015-10-13
Classification: A01G,F16K,H01F

Abstract:
1. A duplex encoder/decoder pair for interfacing a first current source and a second current source with a first load and a second load over a single conductor, comprising an encoder portion having a first input for connection to said first current source, and a second input for connection to said second current source, and an output for connection to the single conductor, and comprising a decoder portion having an input for connection to the conductor, a first output for connection to a first load and a second output for connection to a second load, where the encoder portion is adapted for selectively conducting current from the first encoder input to the encoder output and alternatively the encoder output to the second encoder input, and the decoder portion is adapted for selectively conducting current only from the decoder input to the first decoder output and alternatively from the second decoder output to the decoder input, the decoder portion also incorporates a first switching circuit between said input and said first output, interfaced with a first turn on delay timer to time out a predetermined period before operating said first switching circuit, and a second switching circuit between said input and said second output, interfaced with a second turn on delay timer to time out a predetermined period before operating said second switching circuit, the first decoder output and the second decoder output each including a turn-off delay circuit, each turn-off delay circuit comprising a diode and capacitor connected in parallel, connected in series with an inductor, which when in circuit is connected across the load which is connected to the relevant output.