Abstract
This article presents an operational transconductance amplifier (OTA) with enhanced transconductance and slew rate. High transconductance is achieved by implementing local common-mode feedback (LCMF) in a new path. This new path also is used in providing the current splitting technique. The slew rate is significantly boosted due to a new slew rate enhancement circuit, a new quasi-floating gate (QFG) circuit and two non-linear current mirrors. The advantage of the proposed OTA is that its large-signal and small-signal figures of merits are remarkably improved compared to previous works. The post-layout simulation of the OTA is in TSMC 180 nm CMOS process. Monte Carlo and corner analyses shows the robustness of the OTA with variations of process and mismatch.
Published Version
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