The circuit was developed by Jon Newman while in Steve Potter's lab at Georgia Tech in order to deliver ultra-precise, continuously time-varying light waveforms for optogenetic stimulation. Jon Newman works as a scienctist at the MIT.
Key Publication
J.P. Newman, M.-f. Fong, D.C. Millard, C.J. Whitmire, G.B. Stanley, S.M. Potter. S.M. Potter. 2015. Optogenetic feedback control of neural activity. eLife (4:e07192).