DocumentCode
293287
Title
Analysis of IC op-amp power-supply current sensing
Author
Su, W.J. ; Lidgey, F.J. ; Porta, S. ; Zhu, Q.S.
Author_Institution
Sch. of Eng., Oxford Brookes Univ., UK
Volume
5
fYear
1994
fDate
30 May-2 Jun 1994
Firstpage
541
Abstract
The current characteristics in IC op-amp power-supply current sensing circuits are thoroughly investigated. It is shown that there exists non-ideal currents in op-amp power-supply leads which were formerly considered to be zero. These currents become very large at high frequencies and introduce the main source of errors in these circuits. The equations of the non-ideal currents are given in the paper and based on these, an improved op-amp power-supply current sensing circuit can be obtained
Keywords
bipolar analogue integrated circuits; errors; linear network analysis; operational amplifiers; power electronics; IC op-amp; current characteristics; errors; high frequencies; nonideal currents; power-supply current sensing; Bandwidth; Current supplies; Equations; Frequency; Integrated circuit synthesis; Operational amplifiers; Power engineering and energy; Power supplies; VHF circuits; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on
Conference_Location
London
Print_ISBN
0-7803-1915-X
Type
conf
DOI
10.1109/ISCAS.1994.409432
Filename
409432
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