A tiny, high-speed, wide-band, voltage-feedback operational amplifier capable of driving unlimited capacitive load is described. A class AB input stage is combined with a modified dynamic Witch-Hazel current mirror to provide high slew rate and wide bandwidth with a small die area and small idle current. An RC network couples part of the capacitive load into the high-impedance node, therefore lowering the dominant pole and increasing stability as a function of capacitive load. The part was fabricated on a 3 GHz, 40 V complementary bipolar process. The quiescent current of the chip is 4.5 mA with 1500 V//spl mu/m slew rate and a -3 dB bandwidth of 235 MHz. The part is operational from /spl plusmn/2.5 V to /spl plusmn/18 V supply range. Die size is 38 mils by 46 mils and it fits into a tiny surface outline transistor (SOT) package.
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机译：描述了一种微型，高速，宽带，电压反馈运算放大器，能够驱动无限的电容负载。 AB类输入级与修改后的动态Witch-Hazel电流镜结合使用，可提供较高的压摆率和较宽的带宽，并具有较小的芯片面积和较小的空闲电流。 RC网络将部分电容性负载耦合到高阻抗节点，因此降低了主导极点，并根据电容性负载提高了稳定性。该零件采用3 GHz，40 V互补双极工艺制造。芯片的静态电流为4.5 mA，压摆率为1500 V // spl mu / m，带宽为235 MHz的-3 dB。该部件的工作电压范围为/ spl plusmn / 2.5 V至/ spl plusmn / 18V。芯片尺寸为38 mil x 46 mils，适合小型表面轮廓晶体管（SOT）封装。
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