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本线路能检测信号的频率是否在设定的范围内,并且具有斯密特电路那样的滞后特性。可作为频率超差报警,锁相环应用等。
The line can detect the signal frequency is within the set range, and has the hysteresis characteristics of the Schmitt circuit. Can be used as frequency error alarm, phase-locked loop applications.