Mark Oehlberg

Mark Oehlberg began working with the IBR group in 2003. He started as an undergraduate creating and updating the webpage.  To see Mark's personal webpage click here.

Mark has also worked on a digital controller for a wireless telemetry link.  This wireless power system is designed for use in a retinal prosthetic device which is being developed as part of the BMES ERC. The wireless power system detects how much power is received on the implant side and encodes this information for transmission to the external unit.  The external unit then decodes this data and changes the transmitted power according to the received signal.  Mark's work involves the protocol for data transmission.  The protocol for encoding ones and zeros is reconfigurable so that changes can be made to find the optimal encoding scheme for this link. The verilog code written is in total 4486 lines long ,17121 words, and 137635 characters. Having simulated the code and verified it's functionality it will be made into a chip.

The verilog controlled FPGA board connected to the wireless telemetry system is shown below (the FPGA board is the bottom most board with all of the white wires connected to it):

In addition to the wireless power controller Mark is also working on a waveform generator to create a custom waveform for experiments with David Sretavan's lab at UCSF.  The first prototype of the system is shown below:

In addition to the above projects Mark is also working on a system to verify the Virtual Electrode theory developed by Zhi Yang.