Patent ID: 9517351
Filing Date: 2016-12-13
CPC Classification: A61M,A61N

Claim Text:
1. A method of modulating a user's cognitive state by transdermal electrical stimulation, the method comprising: delivering an ensemble current waveform for application between two or more electrodes, wherein the ensemble current waveform comprises a series of component waveforms that are sequentially delivered, wherein the component waveforms comprise biphasic pulses and wherein each component waveform in the series is different from a component waveform immediately before it and/or immediately after it in the series by one or more of: a duration, a current amplitude, a frequency, a percent charge imbalance, and a percent duty cycle; wherein, prior to delivery, one or more of the component waveforms of the ensemble current waveform is modulated by setting the current amplitude to zero at a modulation frequency for a modulation duration that does not result in truncated pulses in the delivered waveform; wherein the modulation duration is the inverse of the modulation frequency and is a multiple of an inverse of the component waveform frequency.