IEEE JOURNAL OF SOLID-STATE CIRCUITS, cilt.34, sa.1, ss.107-110, 1999 (SCI-Expanded)
This paper presents a CMOS output stage devised for driving heavy resistive loads. An operational amplifier of this type has been fabricated in a 3-mu m double-polysilicon CMOS technology. With a supply voltage of -/+5 V and load of 470 Ohm, the amplifier has a -/+4.6-V output swing and features a 60-mA short-circuit output current. Although simple, the proposed configuration enables the output transistors to be driven efficiently.