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|Title:||A low-voltage operational amplifier with high slew-rate for sigma-delta modulators|
|Citation:||IEEE International Symposium on Circuits and Systems, 2006: Proceedings: 21-24 May:pp.903-906|
|Series/Report no.:||IEEE International Symposium on Circuits and Systems|
|Conference Name:||IEEE International Symposium on Circuits and Systems (2006 : Kos, Greece)|
|Joongho Choi; Jinup Lim; Cheng Chew Lim|
|Abstract:||This paper presents the design of a low-voltage operational amplifier suitable for sigma-delta (/spl Sigma//spl Delta/) modulator applications. The circuit technique is proposed to enhance the slew-rate performance and correspondingly can help to save the power of the amplifier. The simple circuitry of a current mirror is included with a degenerate resistor that can be selectively shunted. High-speed 2nd-order /spl Sigma//spl Delta/ modulators incorporating this technique is designed in a 0.18-/spl mu/m CMOS technology and power consumption can be saved more than 20% for a power supply voltage of 1.2V.|
|Rights:||© 2006 IEEE|
|Appears in Collections:||Electrical and Electronic Engineering publications|
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