Journal
ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING
Volume 77, Issue 2, Pages 221-233Publisher
SPRINGER
DOI: 10.1007/s10470-013-0140-9
Keywords
Transimpedance amplifier; TIA; CMOS; Multi-path TIA; Optical data receiver
Funding
- University of Calgary
- NSERC's Special Research Opportunity program
- NSERC Discovery Program
- National Research Council of Canada
- CMC Microsystems
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This paper discusses the use of mutli-path inductorless transimpedance amplifiers (TIAs), consisting of several different second-order shunt-feedback sub-TIAs (SF-sTIAs) driven by the photodiode, to break the single-stage technology-dependent transimpedance limit. The advantage of the MP-TIA that is explored in this work is in its third-order transfer function, which provides additional degrees of freedom in tailoring the performance. Pole and zero locations of the MP-TIA transfer function are examined and verified with behavioural simulations. The theoretical transimpedance limit for MP-TIAs based on two SF-sTIAs is derived. The possibility of further increasing the transimpedance limit vs bandwidth trade-off by combining three and four sub-TIAs is investigated with simulations. A transistor-level design example of an MP-TIA is presented. The 0.13-mu m CMOS MP-TIA achieves the largest figure-of-merit among published TIAs.
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