In order to ensure A phase and B phase circuits are symmetric, digital potentiometer X9C503 with exterior pressed key in the feedbackamplification circuit is designed.
在反馈放大电路设计时，采用数字电位器X9C503与外部按键配合，达到了A、B两相电路的对称性。
2
The u. c. l. a. researchers matched the scattered light with the pump energy from another laser in a way that created constructive feedback resulting in a net amplification of light.
加大洛杉矶分校研究人员让散射光与来自另一具雷射的能量相遇，以产生建设性的反馈，借此放大光的净振幅。
3
Combined with wide band current feedback amplifier, FET input circuit and programmable circuit, variable gain amplification circuit with high speed and high input impedance is designed.