Abstract: A decoder that receives a Manchester encoded signal including a start of frame sequence followed by coded data values followed by an end of frame sequence. The decoder also includes a detector that detects the start of frame sequence and the end of frame sequence to determine a beginning and end of the coded data values in the Manchester encoded frame. The decoder includes an integrator with hysteresis that includes an up-down counter and provides an output signal responsive to upper and lower threshold values. The output signal is applied to a discriminator that includes a counter which counts up in response to one value of the output signal of the integrator and is reset in response to the other value of the output signal of the integrator.

Abstract: An encoding system including an encoder that Manchester encodes a data value to produce a coded data value and produces a first invalid Manchester encoded sequence as a start of frame. Also produced is a second invalid Manchester encoded sequence as an end of frame. A transmission packet is produced including the start of frame followed by the coded data value followed by the end of frame. The start of frame is a sequence of "110110" and the end of frame is a sequence of "001000".