论文信息 - Differential OPAMP with Inherent Common-Mode Control and Self-Biased Cascodes in 120nm CMOS

Differential OPAMP with Inherent Common-Mode Control and Self-Biased Cascodes in 120nm CMOS

A fully differential operational amplifier with high gain and high bandwidth in deep-sub-mum CMOS is presented. The operational amplifier has up to five serial connected stages. The shown signal-path concept is suitable to reach high gain and bandwidth. The used compensation avoids pole-zero doublet problems. Positive-feedback circuits are used to set the operating point of cascodes and load elements. Production costs are kept low by using only regular-threshold transistors in the design. A DC gain of 99dB and a transit frequency of 330MHz were measured

Horst Zimmermann | Franz Schlögl | Horst Dietrich

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