# US 10,483,990 B2 · Frequency compensator, electronic device and frequency compensation method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,483,990 B2 - Document ID: US10483990B2 - Status: Granted - Kind: B2 - Application number: 15/952,531 - Filed: 2018-04-13 - Published: 2019-02-14 - Granted: 2019-11-19 - Earliest claimed: 2017-08-09 - Assignees: Boe Technology Group Co., Ltd. - Applicants: BOE Technology Group Co., Ltd. - Inventors: Liming Xiu - Web page: https://patentgrep.com/patent/US10483990B2 ## CPC - H03L 7/085: concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal (H03L7/10 takes precedence; circuits for comparing the phase or frequency of two mutually-independent oscillations H03D13/00) - H03K 5/135: by the use of time reference signals, e.g. clock signals - H03L 7/099: concerning mainly the controlled oscillator of the loop - H03L 7/0996: {Selecting a signal among the plurality of phase-shifted signals produced by the ring oscillator} - H03L: AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES (generation of oscillations H03B) - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) ## Abstract A frequency compensator, an electronic device, and a frequency compensation method are disclosed. The frequency compensator includes a control circuit and a frequency compensation circuit. The control circuit is configured to generate a frequency control word according to an initial frequency and an target frequency. The frequency compensation circuit is configured to receive an input signal of an initial frequency, and to generate and output an output signal of a compensated frequency according to the frequency control word and the input signal of the initial frequency. ## Claims ### Claim 1 A frequency compensator, comprising: a control circuit configured to generate a frequency control word according to an initial frequency and a target frequency; and a frequency compensation circuit is configured to: receive an input signal of the initial frequency; and generate and output an output signal of a compensated frequency according to the frequency control word and the input signal of the initial frequency, wherein the control circuit comprises: an input sub-circuit configured to obtain the initial frequency, the target frequency, and a frequency multiplication parameter; a calculation sub-circuit configured to generate the frequency control word according to the initial frequency, the target frequency, and the frequency multiplication parameter; and an output sub-circuit configured to output the frequency control word to the frequency compensation circuit. ### Claim 2 (depends on 1) The frequency compensator of claim 1, wherein the frequency control word is: F=(K·N·C·fc)/fT, wherein F represents the frequency control word, N represents the frequency multiplication parameter, fc represents the initial frequency, fT represents the target frequency, K represents a positive integer greater than 1, and C is a constant. ### Claim 3 (depends on 2) A frequency compensator of claim 2, wherein C=1/K, and the frequency control word is F=(N·fc)/fT. ### Claim 4 (depends on 1) The frequency compensator of claim 1, wherein the frequency compensation circuit comprises: a reference time unit generation sub-circuit configured to receive the input signal of the initial frequency, and to generate and output a reference time unit according to the initial frequency; a frequency adjustment sub-circuit configured to generate and output an intermediate signal of an intermediate frequency according to the frequency control word and the reference time unit; and a frequency multiplication sub-circuit configured to generate and output the output signal of the compensated frequency according to the intermediate signal. ### Claim 5 (depends on 4) The frequency compensator of claim 4, wherein the frequency multiplication sub-circuit comprises: a first phase-locked loop configured to perform frequency multiplication on the intermediate signal of the intermediate frequency according to the frequency multiplication parameter so as to obtain an output signal of the compensated frequency. ### Claim 6 (depends on 5) The frequency compensator of claim 5, wherein the reference time unit generation sub-circuit comprises: a voltage controlled oscillator configured to oscillate at a predetermined oscillation frequency; a second phase-locked loop configured to lock an output frequency of the voltage controlled oscillator to a reference output frequency which is related to the initial frequency; K output terminals configured to output K output signals of the reference output frequency with evenly-spaced phases, where K is a positive integer greater than 1, wherein the reference output frequency is expressed as fΔ, the reference time unit is a time span between any two adjacent output signals output from the K output terminals, the reference time unit is expressed as Δ, and Δ=1/(K·fΔ). ### Claim 7 (depends on 6) The frequency compensator of claim 6, wherein the intermediate frequency is: fs=(K/F)·fΔ, wherein fs represents the intermediate frequency, and F is the frequency control word. ### Claim 8 (depends on 7) The frequency compensator of claim 7, wherein the compensated frequency is fo=(K·N·C/F) fc, wherein fc represents the initial frequency, N is the frequency multiplication parameter, F is the frequency control word, and C represents a constant. ### Claim 9 (depends on 4) The frequency compensator of claim 4, wherein the frequency adjustment sub-circuit is a Time-Average-Frequency Direct Period synthesizer. ### Claim 10 (depends on 5) The frequency compensator of claim 5, wherein the frequency adjustment sub-circuit is a Time-Average-Frequency Direct Period synthesizer. ### Claim 11 (depends on 6) The frequency compensator of claim 6, wherein the frequency adjustment sub-circuit is a Time-Average-Frequency Direct Period synthesizer. ### Claim 12 (depends on 7) The frequency compensator of claim 7, wherein the frequency adjustment sub-circuit is a Time-Average-Frequency Direct Period synthesizer. ### Claim 13 (depends on 8) The frequency compensator of claim 8, wherein the frequency adjustment sub-circuit is a Time-Average-Frequency Direct Period synthesizer. ### Claim 14 (depends on 1) An electronic device, comprising: a frequency source configured to provide the input signal of the initial frequency; and the frequency compensator of claim 1.