標題: A 40 mW 3 Gb/s Self-Compensated Differential Transimpedance Amplifier With Enlarged Input Capacitance Tolerance in 0.18 mu m CMOS Technology
作者: Tsai, Chia-Ming
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Negative impedance compensation;optical receiver;transimpedance amplifier
公開日期: 1-Oct-2009
摘要: By combining an appropriate differential-sensing scheme with the bootstrapping technique, this paper presents a self-compensated design topology which is shown to be effective at reducing the loading effects due to the photodiode and the ESD protection circuit at the differential inputs. The built-in offset creation technique is introduced to overcome voltage headroom limitation. Furthermore, the negative impedance compensation is employed to enhance the gain-bandwidth product. The IC is shown to be tolerant of ESD protection circuit with 0.5 pF equivalent capacitance at the differential inputs. While connected to an InGaAs PIN photodiode exhibiting 0.8 pF equivalent capacitance, the implemented IC has achieved a differential transimpedance gain of 3.5 k Omega and a -3 dB bandwidth of 1.72 GHz. At a data rate of 3 Gb/s, the measured dynamic range is from -20 dBm to +0 dBm at a bit-error rate of 10(12) with a 2(31) - 1 pseudorandom test pattern. The negative impedance compensation is shown to achieve enhancement factors of 4.5 dB and 520%, respectively, for transimpedance gain and -3 dB bandwidth. The IC totally consumes 40 mW from a 1.8 V supply.
URI: http://dx.doi.org/10.1109/JSSC.2009.2027555
http://hdl.handle.net/11536/6603
ISSN: 0018-9200
DOI: 10.1109/JSSC.2009.2027555
期刊: IEEE JOURNAL OF SOLID-STATE CIRCUITS
Volume: 44
Issue: 10
起始頁: 2671
結束頁: 2677
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