A 12.5 Gb/s 1.38 mW all-inverter-based optical receiver with multi-stage feedback TIA and continuous-time linear equalizer
- Resource Type
- Original Paper
- Authors
- Yan, Peng; Hong, Chaerin; Chang, Po-Hsuan; Kang, Hyungryul; Annabattuni, Dedeepya; Kumar, Ankur; Fan, Yang-Hang; Liu, Ruida; Rady, Ramy; Palermo, Samuel
- Source
- Analog Integrated Circuits and Signal Processing: An International Journal. 119(2):283-296
- Subject
- Active inductor
CMOS
CTLE
Inverter
Low noise
Low power
Optical receiver
Transimpedance amplifier
Transimpedance limit
- Language
- English
- ISSN
- 0925-1030
1573-1979
An optical receiver employs an all-inverter-based front-end design that provides maximum transconductance for a given power supply and allows for ultra-low power consumption. The feedback transimpedance amplifier (TIA) input stage utilizes a multi-stage amplifier to achieve a dramatic increase in feedback resistance and lower input-referred noise. Cascading an inverter-based active inductor continuous-time linear equalizer provides frequency peaking to compensate the input stage TIA that is intentionally designed with a reduced bandwidth to achieve adequate sensitivity at low power. Fabricated in 28 nm CMOS, the 12.5 Gb/s optical receiver achieves -μm210.7 dBm OMA sensitivity at 0.11 pJ/bit energy efficiency and occupies only 720 -μm2 area.