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电路中的IC1选用EL2045CN,是少数几种具有电压反馈的宽带运算放大器之一。该运放有足够的带宽、很快的响应速度,并能对象本电路所要求的具有电流驱动能力。该运放的技术指标对本应用而言,或许太高,能在100MHz的带宽内提供增益为2的电压放大量。本电路所需的带宽为4.4MHz,响应速度为275V/s。
The circuit IC1 EL2045CN use, is one of the few wideband operational amplifier with voltage feedback. The op amp has enough bandwidth, fast response speed, and the object of the current circuit required by the drive capability. The operational specifications of this op amp may be too high for this application to provide a gain of 2 for a gain of 2 in a 100MHz bandwidth. The required bandwidth of this circuit is 4.4MHz, the response speed is 275V / s.