振荡器增益调节器电路及其选择方法以及锁相回路
By introducing an oscillator gain regulator circuit and a fine-tuning control circuit into the hybrid PLL, the frequency drift problem caused by temperature changes is solved, and the frequency range coverage and stability improvement of the hybrid PLL under different temperature conditions are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD
- Filing Date
- 2022-04-24
- Publication Date
- 2026-07-17
AI Technical Summary
When a hybrid PLL operates in phase tracking mode, its frequency tuning range is limited by a fixed power supply voltage, and temperature variations cause component frequency drift, preventing the analog control loop from tuning the VCO to match the frequency of the reference input signal.
An oscillator gain regulator circuit is adopted, which includes a hybrid oscillator and a fine-tuning control circuit. The frequency range of the hybrid oscillator can be adjusted by fine-tuning signal, coarse-tuning signal and fine-tuning selection signal. Combined with analog control loop and digital control loop, precise matching of frequency and phase is achieved.
Under different temperature conditions, the coverage device covers the entire specified frequency range, reducing quantization noise and improving the stability of the phase-locked loop and the flexibility of frequency tuning.
Smart Images
Figure CN115296663B_ABST