DIN EN 60444-1-2000 用π型网络的零相位技术测量石英晶体单元的参数.第1部分:用π型网络的零相位技术测量石英晶体单元的谐振频率和谐振阻抗
Measurement of quartz crystal unit parameters by zero phase technique in a -network - Part 1: Basic method for the measurement of resonance frequency and resonance resistance of quartz crystal units by zero phase technique in a -network (IEC 60444