Patent Number: 7,088,178

Title: High-gain, bulk-driven operational amplifiers for system-on-chip applications

Abstract: An ultra-low voltage rail-to-rail operational transconductance amplifier (OTA) is based on a standard digital 0.18 .mu.m CMOS process. Techniques for designing a 0.8 volt fully differential OTA include bias and reference current generator circuits. To achieve rail-to-rail operation, complementary input differential pairs are used, where the bulk-driven technique is applied to reduce the threshold limitation of the MOSFET transistors. The OTA gain is increased by using auxiliary gain boosting amplifiers.

Inventors: Rosenfeld; Jonathan (Rochester, NY), Kozak; Mucahit (Tonawanda, NY), Friedman; Eby G. (Rochester, NY)

Assignee: University of Rochester

International Classification: H03F 3/45 (20060101)

Expiration Date: 8/08/02018