Comparison of Different Precision Pseudo Resistor Realizations in the DCFeedback of Capacitive Transimpedance Amplifiers In this paper, three different pseudo resistor (PR) realizations are compared regarding their noise and linearity performance within the DC feedback loop of an integratordifferentiator transimpedance amplifier (IDTIA). Thanks to its intrinsic shot noise suppression, the multielement pseudo resistor (MEPR) shows the best SNDR for small AC signals around a large DC current. In contrast, for large AC signals around comparably small DC currents, the transconductor based PR introduced by Ferrari et al. in 1 displays a railtorail signal swing capability and a small THD of 0.4% resulting in the best achievable SNDR value. All simulations have been performed on transistor level in a 180 nm SOI CMOS technology with a 1.8 V supply.

CMOS LowVoltage Indirect Current Feedback Instrumentation Amplifiers With Improved Performance Indirect current feedback (ICF) is a very common operation principle used in the design of CMOS instrumentation amplifiers (IA). The input and output transconductors required in an ICF IA usually consist on resistivedegenerated simple differential pairs. In this contribution conventional sourcefollower (SF) structures used in IA transconductors are replaced by flippedvoltagefollower (FVF) and supersourcefollower (SSF) cells, respectively. As a result, the overall performance and efficiency of the IA is enhanced with a minimum cost. The principle of operation governing CMRR is also analyzed and its behavior is confirmed by means of extensive simulations. A singlestage IA with a fixed voltage gain equal to 10 VV has been designed in  0.35boldsymbolmu mathbfm  standard CMOS technology to operate with 1.8 V supply. Simulation results show improved metrics in terms of voltage gain accuracy, while the overall performance of the IA is comparable to other contributions in the literature.