[讨论] 关于运放"频率vs增益"的疑问

High Performance Video Op Amp
AD811
Rev. E
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FEATURES
High speed
140 MHz bandwidth (3 dB, G = +1)
120 MHz bandwidth (3 dB, G = +2)
35 MHz bandwidth (0.1 dB, G = +2)
2500 V/μs slew rate
25 ns settling time to 0.1% (for a 2 V step)
65 ns settling time to 0.01% (for a 10 V step)
Excellent video performance (RL =150 Ω)
0.01% differential gain, 0.01° differential phase
Voltage noise of 1.9 nV/√Hz
Low distortion: THD = −74 dB @ 10 MHz
Excellent dc precision: 3 mV max input offset voltage
Flexible operation
Specified for ±5 V and ±15 V operation
±2.3 V output swing into a 75 Ω load (VS = ±5 V)

为什么增益要求不高的时候(0.1dB)带宽(35Mhz)反而较小？括号里的"G = +2"代表什么意思？

回复 楼主 laojiededepan 的帖子

虽然是英文，但是对于做过设计的工程师们来说，应该不难看懂，请大家耐心帮忙解决一下 谢了