APPARATUS FOR IMPROVED DPLL SETTLING AND TEMPERATURE COMPENSATION ALGORITHMS USING SECOND OPEN LOOP OSCILLATOR TUNING FIELD

• Main Authors: ROITHMEIER ANDREAS, GUSTEDT THOMAS, DIETL-STEINMAURER HERWIG, BUCKEL TOBIAS, WICPALEK CHRISTIAN, LEISTNER ANDREAS
• Format: Patent
• Language: Chinese; English
• Published: 02.10.2020
• Subjects: AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY

A digital phase-locked loop has a digitally controlled oscillator with a first coarse tuning field for coarse tuning of the oscillator frequency, a second coarse tuning field for tuning of the oscillator frequency at finer intervals than the first coarse tuning field, and a fine tuning field for tuning the oscillator to an output frequency at finer intervals than the second coarse tuning field. The second coarse tuning field provides open loop tuning and is linear and connected parallel to the first coarse tuning field. The second coarse tuning field provides wide field temperature compensation and frequency error determination at start up based on an interpolated frequency value obtained prior to start up. Faster settling is provided with less complex algorithms. 一种数字锁相环路具有数控振荡器，该数控振荡器具有第一粗调谐场、第二粗调谐场和细调谐场，该第一粗调谐场用于对振荡器频率进行粗调谐，该第二粗调谐场用于以比该第一粗调谐场更细的间隔对该振荡器频率进行调谐，该细调谐场用于以比第二粗调谐场更细的间隔将该振荡器调谐至输出频率。该第二粗调谐场提供开环调谐，并且该第二粗调谐场是线性的并与该第一粗调谐场并联连接。该第二粗调谐场基于在启动之前获得的经插值的频率值在启动时提供宽场温度补偿以及频率误差确定。更快的稳定设置有不太复杂的算法。