This paper describes the major performance and applications of the PFM (pulsefrequencymodulation) optical fiber transmission equipment for colour TV programs with two accompanying sound channels.
本文叙述PFM彩色电视双伴音传输设备的主要性能和应用。
2
A pulsefrequencymodulation (PFM) with discrete frequency is designed.
设计了一种离散频率的PF M控制方式。
3
A pulsefrequencymodulation (PFM) circuit for retinal prosthesis, which generates electrical pulses with frequency proportional to the intensity of incident light, is presented.