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A new 10 Gbit/s class average-detection-type burst-mode limiting amplifier (LA) IC with SiGe BiCMOS technology has been developed. A burst-mode receiver using this LA IC can realise both a high-speed response and a high tolerance to consecutive identical digits. A settling time of less than 150 ns and a sensitivity of -29.8 dBm at a bit error rate of 10^sup -3^ with a 2^sup 31^ - 1 pseudorandom bit sequence was achieved.
Introduction: In recent years, the explosive spread of the Internet has led to a demand for a broadband access network capable of providing large capacity content. To broaden the total bandwidth, 10 Gbit/sclass PON systems are now being actively investigated, and the establishment of a 10 Gbit/s-class burst-mode transmitter (B-Tx) and receiver (B-Rx) [1- 4] in the uplink is the most significant and difficult problem. The B-Rx should have a faster response to improve the upstream transmission efficiency, and a higher tolerance to long consecutive identical digits (CID) to guarantee error-free operation for the 64B/66B code of the 10-G Ethernet and STM-64/OC-192 of the SDH/SONET. Recently, an AC-coupled B-Rx was proposed as a cost-effective solution offering higher interoperability. However, with an average detection type burst-mode limiting amplifier (LA) in an AC-coupled B-Rx there is an inherent trade-off between the shortening of the time constant of the AC coupling or average detector (AD) and the tolerance to CID. We therefore proposed the baseline-wander commonmode rejection (BLW-CMR) technique and the inverted distortion technique to cancel out the effect of AC-coupling and to shorten the AD time constant, respectively, without any degradation of the CID tolerance [3, 4]. However, in our previous report [4], we did not obtain sufficient CID tolerance. We have therefore modified the AD time constant and achieved a settling time of less than 150 ns...