Frequency detector
CN119827835APending Publication Date: 2025-04-15KTD ELECTRONICS
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Patent Information
- Application Number
- CN202510047748.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-04-15
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Figure CN119827835A_ABST
Abstract
The invention discloses a frequency detector which comprises a band-pass filter circuit, a signal amplification circuit, a charging and discharging circuit and a comparator COMP. The input end of the band-pass filter circuit is connected with the input end of the frequency detector, the output end of the band-pass filter circuit is connected with the input end of the signal amplification circuit, the output end of the signal amplification circuit is connected with the input end of the charging and discharging circuit, and the output end of the charging and discharging circuit is connected with the second input end of the comparator COMP. The first input end of the comparator COMP is connected with a reference voltage Vth, and the output end of the comparator COMP is connected with the output end of the frequency detector. The frequency detector is simple in structure and high in detection precision.
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