25th IEEE International Conference on Electronics, Circuits and Systems (ICECS)
Abstract
—A readout circuit for the measurement of amperometric sensors is presented. The circuit consists of analog
frontend (AFE) and an automatic gain adjustment circuit to tune
the gain of the AFE according to the input current covering a
wide dynamic range of 169dB and a minimum input referred
noise of 44 fA. The circuit is implemented in 0.35 µm technology,
consumes 5.83 mW from 3.3 V supply voltage and occupies
0.31 mm2
silicon area
