电子计数器具有高的精度和使用方便等优点,因而已获得广泛的应用。但是,由于它使用元、器件较多,又有很宽的频带,在稳定性、可靠性方面往往比其它仪器差一些。特别是高速电子计数器,它的频带更宽,使用元、器件更多。为了适应高速度,在一些高速电路中往往要求器件在大电流、小电压的状态下工作。电路往往复杂化了。而且工作点往往调整在较灵敏的地方。此外,当电路的工作频率接近它所能承受的极限频率时,器件能够正常工作条件下的外界条件(例如电源电压,环境温度,触发信号的幅度、工作点等)的变化范围大大缩小。这样,就大大损害了高速电子计数器的稳定性和可靠性。 Electronic counter with high accuracy and ease of use, etc., which have been widely used. However, because of its use of elements, devices have more and have a very wide frequency band, the stability and reliability are often worse than other instruments. Especially high-speed electronic counters, it has a wider frequency band, the use of meta, more devices. In order to adapt to the high speed, it is often required in some high-speed circuits that the device should be operated under high-current and low-voltage conditions. The circuit is often complicated. And work points are often adjusted in a more sensitive place. In addition, the range of external conditions (such as supply voltage, ambient temperature, amplitude of trigger signal, operating point, etc.) under normal operating conditions can be greatly reduced when the operating frequency of the circuit is close to the limit frequency it can withstand. In this way, the stability and reliability of the high-speed electronic counter are greatly impaired.