The high-frequencymodulation reference light and the optical signal to be tested are reflected to the photoelectric sensor by a semi-permeable semi-reflector.
高频调制参考光和被测光信号是通过半透半反光镜照 射到光电传感器上。
2
Highfrequency pulse width modulation power control systems can be realized using semiconductor switches.
高频脉冲宽度调制电力控制系统，可以实现用半导体开关。
3
The highfrequencymodulation characteristics of GaAs-GaAlAs DH LBDs are analyzed and the results (data and curves) presented.