放大器的增益带宽积（指定为GBWP，GBW，GBP或GB）是放大器带宽和带宽的增益的乘积，是用来简单衡量放大器的性能的一个参数。在频率足够大的时候，增益带宽积是一个常数。对于晶体管而言，电流增益带宽积被称为fT或过渡频率。
电压反馈放大器的电路带宽等于增益带宽积除以噪声增益。
This circuit's bandwidth, with a voltage-feedback amp, equals the gain-bandwidth product divided by the noise gain.
运用一阶单时间常数低通函数模拟运算放大器的开环增益，对RC桥式振荡电路进行线性分析，得出最大振荡频率为运算放大器增益带宽积的16.67%。
The maximum frequency of RC-bridge oscillator is 16.67% of gain bandwidth product of amplifier analyzed based on a first-order single time constant lowpass function model.
基于矢量水听器的声能流检测器利用空间声能流抵消技术相对于声压检测器可获得与时间带宽积成正比的时空增益。
The acoustic energy flux detector based on vector hydrophone using counteractive technique of spacial acoustic energy flux, can obtain spatiotemporal gain proportion with time-bandwidth product.
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