Abstract
A low-noise transimpedance amplifier with tunable high gain is presented in this paper. It uses an improved two-stage topology in order to increase the design flexibility in gain- bandwidth and gain-noise trade-offs. The pseudo-resistor is used to reach ultra-high gain. The circuit dissipates 183µW from a 1.8V supply using standard 0.18µm CMOS 1P6M technology and it accomplishes 2.75MHz bandwidth with 160dB gain, 20.9kHz bandwidth with 220dB gain, nearly 0° phase shift in passband and 42fA/sqrt(Hz) input-referred current noise at 20kHz. The proposed transimpedance amplifier provides a perfect solution aimed for biosensing and optical interfacing where low noise and high gain are needed.
| Original language | American English |
|---|---|
| Journal | Proceedings of the 63rd International Midwest Symposium on Circuits and Systems |
| DOIs | |
| State | Published - Sep 2 2020 |
Keywords
- Low Noise
- Pseudoresistor
- Transimpedance Amplifier
Disciplines
- Electrical and Computer Engineering
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