Lima, Jader A. de [UNESP]Silva, Sidnei F. [UNESP]Cordeiro, Adriano S. [UNESP]Araujo, Alexandro C. [UNESP]Verleysen, Michel [UNESP]2014-05-202014-05-202000-01-01Iscas 2000: IEEE International Symposium on Circuits and Systems - Proceedings, Vol V. New York: IEEE, p. 277-280, 2000.0271-4310http://hdl.handle.net/11449/130712A CMOS/SOI circuit to decode PWM signals is presented as part of a body-implanted neurostimulator for visual prosthesis. Since encoded data is the sole input to the circuit, the decoding technique is based on a double-integration concept and does not require dc filtering. Nonoverlapping control phases are internally derived from the incoming pulses and a fast-settling comparator ensures good discrimination accuracy in the megahertz range. The circuit was integrated on a 2 mu m single-metal SOI fabrication process and has an effective area of 2mm(2) Typically, the measured resolution of encoding parameter a was better than 10% at 6MHz and V-DD=3.3V. Stand-by consumption is around 340 mu W. Pulses with frequencies up to 15MHz and alpha = 10% can be discriminated for V-DD spanning from 2.3V to 3.3V. Such an excellent immunity to V-DD deviations meets a design specification with respect to inherent coupling losses on transmitting data and power by means of a transcutaneous link.277-280engDigital filtersElectric network analysisElectric network synthesisEnergy utilizationImage analysisImage qualityIntegrated circuit layoutPhase comparatorsPulse width modulationSignal encodingSilicon on insulator technologyBody-implanted neurostimulatorsFast-settling comparatorsCMOS integrated circuitsTrabalho apresentado em evento10.1109/ISCAS.2000.857418WOS:000088845800070Acesso aberto2-s2.0-0033720975