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. Author manuscript; available in PMC: 2018 Dec 1.
Published in final edited form as: IEEE Trans Biomed Circuits Syst. 2017 Dec;11(6):1192–1203. doi: 10.1109/TBCAS.2017.2778048

Fig. 5.

Fig. 5

(a) Schematic illustration of the programmable current subtraction unit. (b) Schematic of the 5-bit current DAC, supplying a constant current up to 2.48 μA with a step of 80 nA.