摘要
A broadband amplifier with transadmittance and transimpedance stages is designed and two types of improved AGC amplifiers are developed on the base of theory study. Making use of the basic amplifier cells, a main amplifier IC for optical-fiber receivers is deliberated. By computer simulating the performances of the designed main amplifier meet the necessity of high gain and wide dynamic range . They are maximum voltage gain of 42 dB, the bandwidth of 730 MHz,the input signal( V p-p )range from 5 mV to 1 V,the output amplitude about 1 V, the dynamic range of 46 dB. The designed circuit containing no inductance and large capacitance will be convenient for realizing integration. A monolithic integrated design of 622 Mb/s main amplifier is completed.
１ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｔｈｅｐａｓｔｔｗｅｎｔｙｙｅａｒｓｏｐｔｉｃａｌ－ｆｉｂｅｒｃｏｍｍｕｎｉｃａｔｉｏｎｈａｓｄｅｖｅｌｏｐｅｄｖｅｒｙｆａｓｔａｎｄｎｏｗｉｔｂｅｃｏｍｅｓｏｎｅｏｆｔｈｅｍａｊｏｒｃｏｍｍｕｎｉｃａｔｉｏｎｍｅｔｈｏ...
