Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Pei Wei Chen0
Fang-Ren Liao0
Date of Patent
May 10, 2022
0Patent Application Number
170876480
Date Filed
November 3, 2020
0Patent Citations
Patent Primary Examiner
During frequency detection, a constant current source outputs an output current to charge a variable capacitor for multi-period. In a calibration mode, according to a comparison result between a cross voltage of the variable capacitor and a reference voltage, a capacitance value of the variable capacitor is adjusted. In a monitor mode, according to a reference frequency and the cross voltage of the variable capacitor, a frequency under test of a circuit under test is detected.
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