Distributed clock gating for power reduction of a programmable waveform generator for neural stimulation.
This paper describes how to employ distributed clock gating to achieve an overall low power design of a programmable waveform generator intended for a neural stimulator. The power efficiency is enabled using global timing control combined with local amplitude distribution over a bus to the local stimulator frontends. This allows the combination of local and global clock gating for complete sub-blocks of the design. A counter and a shifter employed at the local digital stimulator reduce the design complexity for the waveform generation and thus the overall power consumptions. The average power results indicate that 63% power can be saved for the global stimulator control unit and 89-96% power can be saved for the local digital stimulator by using the proposed approach. The circuit has been implemented and successfully tested in a 0.35 µm AMS HVCMOS technology.
Faculty of Electrical Engineering, University Teknologi MARA (UiTM), 13500, Pulau Pinang, Malaysia. emilia659@ppinang.uitm.edu.my
Emilia
E
Noorsal
Kriangkrai
K
Sooksood
Ulrich
U
Bihr
Joachim
J
Becker
Maurits
M
Ortmanns
D004560:Electricity; D004582:Electronics, Medical; D006801:Humans; D058542:Implantable Neurostimulators; D011474:Prosthesis Design