50% duty cycle detector and method thereof
By adopting the combined technology of S2D, controllable switching circuit, TDC and finite state machine in the 50% working cycle detector, the problems of low efficiency and poor layout area of the existing detector are solved, and a fast and efficient 50% working cycle detection is achieved.
CN114362745BActive Publication Date: 2025-03-28REALTEK SEMICON CORP
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Patent Information
- Application Number
- CN202110250324.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2020-10-12
- Filing Date
- 2021-03-08
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2041-03-08
AI Technical Summary
Technical Problem
The existing 50% working cycle detectors are inefficient in detection and are not efficient in layout area. In particular, low-pass filters require large capacitances, resulting in large layout occupancy.
Method used
A single-ended to differential converter (S2D), a controllable switching circuit, a time-to-digital converter (TDC) and a finite state machine are used to detect the operating cycle of the clock through time-to-digital conversion, and a ternary decision is output based on the comparison results.
Benefits of technology
It realizes rapid detection 50% working cycle, reduces the layout area and improves the area use efficiency of the detector.
✦ Generated by Eureka AI based on patent content.
Abstract
A 50% duty cycle detector and method thereof, the 50% duty cycle detector comprising: a single-ended to differential converter (S2D) for receiving a first clock and outputting a second clock and a third clock that are complementary; a controllable switching circuit for receiving the second clock and the third clock and outputting a fourth clock and a fifth clock according to a logic control signal; a time to digital converter (TDC) for receiving the fourth clock and the fifth clock and outputting a digital word; and a finite state machine for receiving the digital word and outputting the logic control signal and a ternary decision.
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