HDMI Extender with Excellent Anti-thunder, Anti-static And Anti-interference Capabilities(PFM700-E/PFM710/PFM377/PFM300) PFM700-E > Power supply: Input voltage DC5V, only supply for transmitter. > Transmission effect: Real-time transmiss...
1、脉冲频率调制(Pulse frequency modulationPFM是频率的有和无的变化) (1)、导通时间不变,断开时间变; (2)、断开时间不变,导通时间变; 一种脉冲调制技术,调制信号的频率随输入信号幅值而变化,其占空比不变。由于调制信号通常为频率变化的方波信号,因此,PFM也叫做方波FM。 优点: (1)、PFM相比较PWM主要优点在于...
PWM和PFM两种控制方式是目前降压DC-DC转换器中应用广泛的两种控制方式,二者各有优劣。本课题旨在通过对PWM-PFM切换降压DC-DC转换器的分析与设计,探究控制方式对DC-DC转换器性能的影响,提高电源管理的效率和可靠性。 二、选题意义和目的 降压DC-DC转换器具有高效率、能够承受大电压波动等特点,已经成为电源管理的首选...
Operation Manual PFMV5 Manifold mounting •Mount the bracket using the mounting screws supplied.•The required tightening torque is 0.32±0.02 Nm.•Mounting in series using the mounting brackets is not suitable for all models, depending on which fitting type is used.Thank you for purchasing...