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BhstractWe fabricated a +3.3 V single-supply burst-mode receiver IC for a passive optical network (PON) system with Si-bipolar technology. This IC consists of a high-speed ATC (Automatic Threshold Control) circuit and limiter amplifier. To achieve both high sensitivity and fast response of the ATC, we designed a new peak detector circuit that includes a sensitive small-signal detector and a high-speed large-signal detector. Measured results show that the ATC circuit responds within 1 mV error at 156 Mb/s. The burst-mode receiver demonstrates high-speed response at the beginning of cells, and a high loud/soft ratio of more than 27 dB. We obtained a minimum sensitivity about -25 dBm at 622 Mb/s. The sensitivity at 622 Mb/s can be improved to -29 dBm by optimizins the bandwidth of the limiter amplifier.Asynchronous transfer modepassive optical network (ATM-PON) systems are expected to provide cost-effective optical subscriber loops that can support multimedia services 113. Figure 1 shows the configuration of an ATM-PON system in which many ONUS (Optical Network Unit) are connected to one OLT (Optical Line Terminal) through optical fiber cables and a star coupler. The downstream transmission is continuous mode, and the upstream is TDMA (Time Division Multiple Access) burst mode. The upstream data format is cell-based, and the cells from each ONU have wide ranges of optical power resulting from their different transmission losses.A burst-mode optical receiver at the OLT is one of the key components in ATM-PON systems. Advanced circuit technology must be developed for the burst-mode receiver, which requires a high loudsoft ratio (a wide detectable power range) and a fast response for bit synchronization at the beginning of a cell. To achieve both a high loudlsoft ratio and fast response, a high-speed ATC (Automatic Threshold Control) circuit, which instantaneously generates an optimum reference level for the input signal, is an essential component of burst-mode receivers.Although the standard data rate for the ATM-PON upstream transmission is 156 Mb/s, an enhanced system up to 622 Mb/s is useful for providing a wider-band service in the future. There have been some reports on burst-mode optical receivers below 156 Mb/s [2], but few on receivers at 622 Mb/s [3].0-7803-4135-X/97/ $5.00 01997 IEEE

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