Voltage-controlled oscillator frequency band searching method and device
A technology of voltage-controlled oscillator and search method, applied in the direction of automatic power control, electrical components, etc., can solve the problem that the binary successive approximation frequency band search algorithm cannot search the optimal frequency band, the frequency noise of the phase-locked loop output signal increases, and the lock The phase loop loses lock and other problems, so as to avoid the loss of lock or re-lock phenomenon, and improve the reliability and robustness.
Active Publication Date: 2020-02-21
苏州全图半导体科技有限公司
View PDF3 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] Embodiments of the present invention provide a method and device for searching a frequency band of a voltage-controlled oscillator to solve the problem that the existing traditional binary successive approximation frequency band search algorithm cannot search for the optimal frequency band, resulting in increased frequency noise of the output signal of the phase-locked loop, causing phase-locked The ring loses lock or relocks
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0050]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0051] Firstly, the method for searching the frequency band of the voltage controlled oscillator provided by some embodiments of the present invention will be described below.
[0052] Such as figure 1 As shown, the embodiment of the present invention provides a voltage-controlled oscillator frequency band search method, including:
[0053] Step 100: Determine the expected output frequency band of the voltage-controlled oscillator according to the...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a voltage-controlled oscillator frequency band searching method and device, and belongs to the technical field of phase-locked loop chips. The method comprises the following steps: evaluating and determining an expected output frequency band of the voltage-controlled oscillator according to frequency error values of a plurality of frequency points of a phase-locked loop; obtaining an expected frequency error value corresponding to the expected output frequency band; calibrating the expected output frequency bAccording to the expected frequency error value to obtain a calibration frequency band; obtaining a calibration frequency error value corresponding to the calibration frequency band; and finally, determining a target frequency band of the voltage-controlled oscillator according to a difference value between the expected frequency error value and the calibration frequency error value. By means of the frequency band searching method for the voltage-controlledoscillator, the frequency band closest to the most ideal target frequency expected to be achieved by the voltage-controlled oscillator can be quickly obtained, the phenomenon that a phase-locked looploses locking or is locked again is avoided, and the reliability and robustness of the system under the industrial application environment can be effectively improved.
Description
technical field [0001] The invention relates to the technical field of phase-locked loop chips, in particular to a method and device for searching a frequency band of a voltage-controlled oscillator. Background technique [0002] A voltage-controlled oscillator refers to an oscillating circuit (voltage-controlled oscillator, VCO) that has a corresponding relationship between the output frequency and the input control voltage. The frequency is an oscillator whose frequency is a function of the input signal voltage. Controlled by the input control voltage, a voltage-controlled oscillator can be formed. [0003] For the phase-locked loop system, the frequency band search calibration process of the general voltage-controlled oscillator can be carried out in the closed-loop loop of the phase-locked loop. However, when the voltage-controlled oscillator has a large number of operating frequency bands, the time it takes to perform band search calibration in the closed loop of the p...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/099
CPCH03L7/0992Y02D30/70
Inventor 周伟黄晓宇袁明海
Owner 苏州全图半导体科技有限公司