Analysis and design of highly linear Gm–TIA PGA with flat gain response
| Autor: | Jianhui Wu, Cheng Huang, Chunfeng Bai |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Transimpedance amplifier
Transconductance 020208 electrical & electronic engineering Bandwidth (signal processing) Linearity 020206 networking & telecommunications 02 engineering and technology Power factor Surfaces Coatings and Films Hardware and Architecture Control theory Cascade Signal Processing 0202 electrical engineering electronic engineering information engineering Cmos process Mathematics |
| Zdroj: | Analog Integrated Circuits and Signal Processing. 97:135-141 |
| ISSN: | 1573-1979 0925-1030 |
| DOI: | 10.1007/s10470-018-1265-7 |
| Popis: | This paper analyzes high linearity Cherry–Hopper programmable-gain-amplifier (PGA), which is a cascade of linear transconductance (Gm) stage and transimpedance (TIA) stage. Basing on these analysis, reasons for gain peaking of Gm–TIA PGA are discussed. A Gm–TIA PGA with flat gain response and high power-efficiency is designed, and implemented in a 0.18 μm CMOS process. It draws 260-μA current from a supply of 1.8-V, while maintains a constant bandwidth of 24-MHz when driving a capacitive load of 2-pF. Flat gain response over the gain range is obtained, and the measured OIP3 reaches 19.5 dBm. |
| Databáze: | OpenAIRE |
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