Method for synthesizing high accuracy digital time-frequency standard
A synthesis method and high-precision technology, applied in the direction of electrical components, automatic power control, etc., can solve problems such as control loop overshoot, narrow loop bandwidth, and difficult control, and achieve control coupling problems, high retention performance and The effect of high precision and high thermal stability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0027] Embodiment 1,
[0028] The method of the present invention is:
[0029] A. Adopt all-digital phase detection and frequency synthesis to separate frequency generation and correction; the oscillator works in free oscillation mode;
[0030] B. The high-precision phase accumulation method is used to realize frequency synthesis, and combined with digital-to-analog conversion, it is output to the filter for noise reduction processing;
[0031] C. Using the method of digital filtering, the phase detection data is processed to obtain the frequency deviation of the oscillator;
[0032] D. The output frequency signal is divided and sent to the phase detector to monitor the quality of frequency synthesis.
[0033] In the method A of the present invention, the oscillator adopts a non-voltage control mode to realize the free oscillation mode.
[0034] In the method B of the present invention, the preferred solution for realizing frequency synthesis by the phase accumulation metho...
Example Embodiment
[0039] Embodiment 2: This method is used for time scale synthesis of Beidou punctual satellite receivers. The time-scale signal of each satellite recovered by the receiver is sent to the phase detector as a reference source signal; the oscillator adopts a temperature-compensated crystal clock, and the output frequency signal directly drives the digital frequency synthesizer, and the other channel is divided by frequency. The input phase detector is compared with the reference source signal, and the result is processed by adaptive filtering to control the frequency word and phase word of the digital frequency synthesis.
Example Embodiment
[0040] Embodiment 3: The method is used in the Beidou high-precision time-frequency application system. The 1PPS signal from the Beidou satellite receiver and the GPS satellite receiver is sent to the phase detector as the reference source signal; the oscillator adopts a double-layer oven controlled crystal clock, and the output frequency signal directly drives the digital frequency synthesizer, and the other channel passes through the digital frequency synthesizer. After frequency division, the input phase detector is compared with the reference source signal, and the result is processed by adaptive filtering to control the frequency word and phase word of the digital frequency synthesis; the digital frequency synthesis adopts the phase accumulation of 56-bit segment count, and the synthesized frequency signal is digital After analog conversion and filtering, it is directly output as a frequency marker signal after the drive circuit; the frequency marker signal is shaped and d...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap