Dynamics of a logarithmic transimpedance amplifier

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
View graph of relations



Original languageEnglish
Article number4252978
Pages (from-to)1673-1676
Journal / PublicationProceedings - IEEE International Symposium on Circuits and Systems
Publication statusPublished - 2007
Externally publishedYes


Title2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007
PlaceUnited States
CityNew Orleans, LA
Period27 - 30 May 2007


We analyze the dynamics of a logarithmic transimpedance amplifier that are not explainable from its small-signal model. The amplifier was used both to measure pixel currents in an imager as well as currents from a floating gate array for accurate programming. We explain the marked asymmetry between the up-going and down-going current steps intuitively using circuit concepts and then based on phase-plane analysis. This analysis also helps develop a method of reducing the huge delay to down-going current steps. © 2007 IEEE.

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.