Frequency measuring system

• Main Authors: CHEN ZHIFENG, FAN YAJING, HAN XUESHAN
• Format: Patent
• Language: Chinese; English
• Published: 10.08.2011
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The utility model discloses a frequency measuring system, which comprises a fanout buffer element and a digital timer. The fanout butter element is provided with a first input terminal, a second input terminal, a first output terminal and a second output terminal. The first input terminal inputs a single-ended signal to be detected, the second input terminal inputs differential signals to be detected in pair, the first output terminal outputs a first measuring signal, and the second output terminal outputs a second measuring signal. The fanout buffer element outputs the single-ended signal to be detected or the differential signals to be detected from the first output terminal and the second output terminal alternatively. The digital timer generates a start signal according to a raising edge of the first measuring signal, generates a first stop signal according to another raising edge of the second measuring signal, and calculates a cycle of the single-ended signal to be detected or the differential signals t