application of combining circuit in signal transmission system 合成电路在信号传输系统中应用
the input of traditional ac-dc converter is diode-capacitance combined circuit . it ? input current wave presents pulse shape, and the power factor ( pf ) on ac line side is low 传统的ac?dc开关变换器输入端是二极管整流-滤波电容组合电路,其输入电流波形呈脉冲状,交流网侧功率因数很低。
this becomes increasingly critical as systems are being designed to combine circuits operating at lower power ( implying higher impedance levels ), higher speed ( implying lower nodal stray capacitance, faster edges, and higher frequencies ), and higher resolution ( much less output noise permitted ) 当今的电子系统常常包含着低功耗(意味着阻抗更高)、高速度(节点寄生电容更小、信号边沿更陡峭、信号频率更高)和高分辨力(噪声容限更小)等电路,因此这个问题尤其应该引起重视。