2009•Journal of SemiconductorsOpen access

A novel fully differential telescopic operational transconductance amplifier

Li Tianwang, Bo Ye, Jiang Jinguang

Abstract

A novel fully differential telescopic operational transconductance amplifier (OTA) is proposed. An additional PMOS differential pair is introduced to improve the unit-gain bandwidth of the telescopic amplifier. At the same time, the slew rate is enhanced by the auxiliary slew rate boost circuits. The proposed OTA is designed in a 0.18μm CMOS process. Simulation results show that there is a 49% improvement in the unit-gain bandwidth compared to that of a conventional OTA; moreover, the DC gain and the slew rate are also enhanced.

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Available abstract

Key concepts: Slew rate, Operational transconductance amplifier, PMOS logic, Transconductance, Operational amplifier, Fully differential amplifier, Bandwidth (computing), Electronic engineering