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本文介绍了140Mb/s光通信系统接收机中所用的AGC主放大模块。此模块采用厚膜电路混合集成形式,将AGC电路、主放大器制作在29.1×13.9mm~2的陶瓷片上,封装在DHM24绝缘子壳内,带宽为200MHz(3dB),增益为50dB,AGC范围大于25dB。在四次群光纤通信系统试验中,接收机灵敏度为-39dBm(误码率10~(-9)),眼图清晰。
This article describes the AGM main amplification module used in the 140Mb / s optical communication system receiver. The module is a hybrid integrated circuit of thick film circuits. The AGC circuit and main amplifier are fabricated on 29.1 × 13.9mm ~ 2 ceramic chips and packaged in a DHM24 insulator case with a bandwidth of 200MHz (3dB), gain of 50dB and AGC range of more than 25dB . In four-group optical fiber communication system test, the receiver sensitivity of -39dBm (BER 10 ~ (-9)), eye clear.