US Patent 11681390 Electronic writing apparatus with multiple conductors

A circuit includes a function module to detect stimulus of an electronic writing apparatus (EWA) and generate functional data based on the detected stimulus. The circuit further includes a processing module to generate an outbound data signal from the functional data and first transceive circuit coupled to a first conductor of the EWA. The first transceive circuit includes a first reference circuit to generate a first transmit reference signal, and a first drive-sense circuit to regulate the first transmit reference signal on the first conductor. The circuit further includes a second transceive circuit coupled to a second conductor of the EWA. The second transceive circuit includes a second reference circuit to generate a second transmit reference signal, where one of the transmit reference signals includes the outbound data signal. The second transceive circuit further includes a second drive-sense circuit to regulate the second transmit reference signal on the second conductor.