A low-power silicon-on-insulator PWM discriminator for biomedical applications
(2000) IEEE International Symposium on Circuits and Systems (ISCAS′2000) — Location: Geneva (Switzerland) (28.May.2000)
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- Authors
- Abstract
- A 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 doubleintegration 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 2mm single-metal SOI fabrication process and has an effective area of 2mm2. Typically, the measured resolution of encoding parameter a was better than 10% at 6MHz and VDD=3.3V. Stand-by consumption is around 340mW. Pulses with frequencies up to 15MHz and a =10% can be discriminated for VDD spanning from 2.3V to 3.3V. Such an excellent immunity to VDD deviations meets a design specification with respect to inherent coupling losses on transmitting data and power by means of a transcutaneous link.
- Affiliations
Universidade Estadual Paulista Electrical Engineering Department
Citations
De Lima, J., Silva, S., Cordeiro, A., Araujo, A., & Verleysen, M. (2000). A low-power silicon-on-insulator PWM discriminator for biomedical applications. Proceedings of the IEEE International Symposium on Circuits and Systems (ISCAS′2000), p. 277-280. https://hdl.handle.net/2078.5/221735