The AD8045 is a unity-gain stable, 1-GHz voltage-feedback amplifier that can slew at 1350 V/μs and settle to 0.1 percent in 7.5 ns. With spurious-free dynamic range of 101 dBc at 5 MHz and low noise ...

Compared to other CFB op amps, the CFBplus offers over 10 dB of improvement in total harmonic distortion (THD) for a gain of 2 using a 100-Ω load at 2-V p-p output.

The closed-loop bandwidth is determined by dividing the unity gain bandwidth of the amplifier by the noise gain. So, for the noninverting configuration of Fig. a, an op amp with 1-MHz unity-gain ...

Looking at the circuit diagram it follows the classic op-amp with a long-tailed pair of NPN transistors driving a PNP gain stage and finally a complimentary emitter follower as an output buffer.

Philbrick Researches’ K2-W is a very-high-gain op-amp design using only two vacuum tubes. There’s a sweet book on Op Amps that’s available for free download from Analog Devices.

The answer b is incorrect as the gain is independent of the supply voltage. As op-amps are high impedance input devices, answer d is wrong on its face. Op-amps are useful and flexible devices in ...