- Document Number:
20240305302
- Appl. No:
18/660325
- Application Filed:
May 10, 2024
- نبذة مختصرة :
Systems and methods are provided for hopping a digitally controlled oscillator (DCO) among a plurality of channels, wherein a gain of the DCO KDCO is a nonlinear function of frequency. A first normalized tuning word (NTW) corresponding to a first channel of the plurality of channels is generated. A first normalizing gain multiplier X is generated based on the nonlinear function of frequency, on an estimate of the nonlinear function of frequency, at a first frequency corresponding to the first channel. The first NTW is multiplied by the first X to obtain a first oscillator tuning word (OTW). The first OTW is input to the DCO to cause the DCO to hop to the first channel. A system for hopping among a plurality of channels at a plurality of respective frequencies comprises a phase-locked loop (PLL), a digitally controlled oscillator (DCO), a multiplexer, and an arithmetic module.
- Claim:
1. A method for controlling a digitally controlled oscillator (DCO), the method comprising: receiving a tuning word corresponding to a first channel of a plurality of channels; and generating a first control signal based on a nonlinear function of frequency at a first frequency, wherein the DCO is configured to receive a first oscillator tuning word (OTW) generated based on the tuning word and the first control signal.
- Claim:
2. The method of claim 1, wherein the tuning word is a first normalized tuning word (NTW), the method further comprising: multiplying the first NTW by the first control signal to obtain the first OTW; and inputting the first OTW to the DCO to cause the DCO to hop to the first channel, wherein the first control signal is generated based on a reference frequency and a linear interpolation of the nonlinear function at the first frequency, and the first frequency corresponds to the first channel.
- Claim:
3. The method of claim 2, wherein the reference frequency is the frequency of a second channel of the plurality of channels.
- Claim:
4. The method of claim 3, wherein the second channel is a central channel of the plurality of channels.
- Claim:
5. The method of claim 2, further comprising: generating a second NTW corresponding to a second channel of the plurality of channels; generating a second control signal based on the nonlinear function of frequency at a second frequency corresponding to the second channel or based on an estimate of the nonlinear function of frequency at the second frequency; multiplying the second NTW by the second control signal to obtain a second OTW; and inputting the second OTW to the DCO to cause the DCO to hop to the second channel.
- Claim:
6. The method of claim 1, wherein at least part of the method is performed in an all-digital phase locked loop (ADPLL).
- Claim:
7. The method of claim 2, wherein the linear interpolation is based on a center point of the nonlinear function of frequency.
- Claim:
8. The method of claim 1, wherein the nonlinear function of frequency is a cubic function of frequency.
- Claim:
9. The method of claim 2, wherein the linear interpolation is based on: [mathematical expression included] in which y corresponds to a change in DCO gain variation, f0 corresponds to a frequency at which the DCO gain variation is 100%, and y0 corresponds to the value of the change in DCO gain variation at which the gain variation is 100%.
- Claim:
10. A system for controlling a digitally controlled oscillator (DCO), the system comprising: a first circuit configured to receive a plurality of tuning words, each tuning word corresponding to a respective channel; and a second circuit configured to generate a plurality of control signals, each control signal being based on a nonlinear function of frequency at a respective frequency, wherein the DCO is configured to receive a plurality of oscillator tuning words (OTWs) and each OTW is generated based on a respective tuning word and a respective control signal.
- Claim:
11. The system of claim 10, further comprising: the DCO; and an arithmetic module configured to generate the plurality of OTWs, wherein the first circuit is a phase-locked loop (PLL) and each control signal is also based on a reference frequency.
- Claim:
12. The system of claim 11, wherein at least one of the second circuit and the arithmetic module is provided as part of a normalized DCO comprising the DCO, wherein the DCO is configured to hop among a plurality of channels based on the plurality of OTWs.
- Claim:
13. The system of claim 10, wherein each control signal is based on a linear interpolation of a nonlinear function of frequency at a respective frequency and the linear interpolation is based on a center point of the nonlinear function of frequency.
- Claim:
14. The system of claim 10, wherein the nonlinear function of frequency is a cubic function of frequency.
- Claim:
15. The system of claim 13, wherein the linear interpolation is based on: [mathematical expression included] in which y corresponds to a change in DCO gain variation, f0 corresponds to a frequency at which the DCO gain variation is 100%, and y0 corresponds to the value of the change in DCO gain variation at which the gain variation is 100%.
- Claim:
16. The system of claim 13, wherein the linear interpolation is based on a value of a change in DCO gain variation.
- Claim:
17. The system of claim 13, wherein the linear interpolation is based on at least one of a frequency at which DCO gain variation is 100% and a value of a change in DCO gain variation at which the DCO gain variation is 100%.
- Claim:
18. A system configured to be coupled to a digitally controlled oscillator (DCO), the system comprising: a first circuit configured to receive a plurality of tuning words, each tuning word corresponding to a respective channel; and a second circuit configured to generate a plurality of control signals, each control signal being based on a nonlinear function of frequency at a respective frequency, wherein the DCO is configured to receive a plurality of oscillator tuning words (OTWs) and each OTW is generated based on a respective tuning word and a respective control signal.
- Claim:
19. The system of claim 18, further comprising: the DCO, wherein the first circuit is an arithmetic module and is further configured to generate a respective OTW based on each control signal, wherein each control signal is based on a reference frequency and a linear interpolation of the nonlinear function of frequency at the respective frequency.
- Claim:
20. The system of claim 19, wherein the linear interpolation is based on a center point of a frequency range.
- Current International Class:
03; 03; 03; 03; 03
- الرقم المعرف:
edspap.20240305302
Processing Request
No Comments.