Positive-Feedback-Based Design Technique for Inherently Stable Active Load Toward High-Gain Amplifiers With Unipolar a-IGZO TFT Devices
| Main Authors: | Dandekar, Mohit, Myny, Kris, Dehaene, Wim |
|---|---|
| Format: | Article Journal |
| Terbitan: |
, 2022
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| Online Access: |
https://zenodo.org/record/6346684 |
Daftar Isi:
- This letter presents analysis of an inherently stable positive-feedback-based active load, first reported in our prior work, to realize high gain analog amplifiers using unipolar a-IGZO TFT technology. Additionally reported are theoretical performance bounds and design guidelines to maximally utilize a general positive-feedback scheme for the active load while maintaining stability. To demonstrate a design implementation, a single stage fully differential operational transconductance amplifier with common mode feedback has been manufactured and measured to have 40-dB open-loop gain at dc and a unity gain frequency of 61 kHz while driving a 30-pF load capacitance.