Patent ID: 7945326

Claim:
An implantable device, comprising: one or more electrodes for implanting in contact with a bodily tissue; a pulse generator configured to produce pulses that are applied to the bodily tissue, wherein the pulses are used to measure a physiological parameter and the pulses are applied via the one or more electrodes; wherein each pulse has a multi-phasic waveform consisting of a number of positive phases and a different number of negative phases, wherein each phase comprises a duration and an amplitude, wherein duration is defined as the width of the phase and amplitude is defined as the length of the phase, and wherein the absolute amplitude of the positive phases is different from the absolute amplitude of the negative phases; wherein the positive phases and the negative phases transfer a net zero charge through the bodily tissue; and wherein the pulses are configured to generate a voltage on one or more capacitors of the bodily tissue and/or the implantable device in series with the impedance load of the bodily tissue path that has a zero-volt mean value.