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图1所示电路采用高速ECL器件来产生一对高精度移相的周期信号,这种信号用来对相位计定标。本电路测试的输入信号范围从16Hz到96MHz(1Hz到6MHz的输出频率)。在6MHz输出频率时,0.1ns的相移精度约0.2°。
The circuit shown in Figure 1 uses high-speed ECL devices to generate a pair of highly accurate phase shifted periodic signals that are used to calibrate the phase meter. This circuit tests the input signal range from 16Hz to 96MHz (1Hz to 6MHz output frequency). At 6MHz output frequency, 0.1ns phase-shift accuracy of about 0.2 °.