A CMOS digitally programmable class AB OTA circuit
作者： H. Elwan , M. Ismail
DOI: 10.1109/82.899653
关键词:
摘要: A new low-voltage CMOS digitally programmable operational transconductance amplifier (OTA) circuit is presented. The utilizes simple class AB voltage buffers to provide a non-slew-rate-limited performance with low standby power consumption. OTA can be programmed maintain constant settling time for different load capacitors without increasing the consumption, Experimental results from 1.2-/spl mu/m chip and comparisons regular folded cascode are given. proposed consumption found less than one third of when driving capacitance 35 pF. For same level 240 /spl mu/A, achieves slew rate more 10 V//spl mu/s while traditional fails settle.
sci-hub.se 参考文章(6)
R. Castello, P.R. Gray, A high-performance micropower switched-capacitor filter IEEE Journal of Solid-state Circuits. ,vol. 20, pp. 1122- 1132 ,(1985) , 10.1109/JSSC.1985.1052449
E. Seevinck, R.F. Wassenaar, A versatile CMOS linear transconductor/square-law function IEEE Journal of Solid-State Circuits. ,vol. 22, pp. 366- 377 ,(1987) , 10.1109/JSSC.1987.1052734
R. Harjani, A low-power CMOS VGA for 50 Mb/s disk drive read channels IEEE Transactions on Circuits and Systems Ii: Analog and Digital Signal Processing. ,vol. 42, pp. 370- 376 ,(1995) , 10.1109/82.392312
Ron Hogervorst, Remco J. Wiegerink, Peter A. L. De Jong, Jeroen Fonderie, Roelof F. Wassenaar, Johan H. Huijsing, CMOS low-voltage operational amplifiers with constant-G/sub m/ rail-to-rail input stage international symposium on circuits and systems. ,vol. 5, pp. 135- 146 ,(1992) , 10.1007/BF01272648
B.E. Boser, B.A. Wooley, The design of sigma-delta modulation analog-to-digital converters IEEE Journal of Solid-state Circuits. ,vol. 23, pp. 1298- 1308 ,(1988) , 10.1109/4.90025
R. Hogorvorst, CMOS low voltage operational amplifiers with constant g_m rail-to-rail input stage Proc. IEEE int. Symp. Circuits Sys., May 1992. ,(1992)