Frequency generation in a quantum controller
View Patent ↗A system comprises time-tracking circuitry and phase parameter generation circuitry. The time-tracking circuitry is operable to generate a time-tracking value corresponding to time elapsed since a reference time. The phase parameter generation circuitry operable to: receive the time-tracking value; receive a control signal that conveys a frequency parameter corresponding to a desired frequency of an oscillating signal; and generate a plurality of phase parameters used for generation of an oscillating signal, wherein the generation of the plurality of phase parameters is based on the time-tracking value and the frequency parameter such that the oscillating signal maintains phase continuity across changes in the frequency parameter.
1. A system comprising:
time-tracking circuitry operable to generate a time-tracking value corresponding to time elapsed since a reference time;
phase parameter generation circuitry operable to:
receive the time-tracking value; and
receive a control signal that conveys a frequency parameter corresponding to a desired frequency of an oscillating signal; and
generate a plurality of phase parameters used for generation of the oscillating signal, wherein the generation of the plurality of phase parameters is based on the time-tracking value and the frequency parameter such that the oscillating signal maintains phase continuity across changes in the frequency parameter.
2. The system of claim 1 , wherein the time-tracking circuitry comprises a register operable to store the time-tracking value and increment the time-tracking value on each cycle of a clock.
3. The system of claim 1 , comprising signal generation circuitry operable to generate the oscillating signal based on the plurality of phase parameters.
4. The system of claim 3 , wherein the signal generation circuitry comprises a CORDIC circuit and a plurality of phase rotator circuits.
5. The system of claim 1 , wherein the phase parameter generation circuitry is operable to alter the plurality of phase parameters over time to achieve a frequency chirp.
6. The system of claim 1 , wherein the phase parameter generation circuitry is operable to:
receive a frequency chirp control signal; and
determine an amount by which to alter the plurality of phase parameters based on a value of a the frequency chirp control signal.
7. The system of claim 6 , comprising control circuitry operable to adjust the value of frequency chirp control signal during runtime based on a feedback signal.
8. The system of claim 1 , comprising control circuitry operable to generate the frequency parameter.
9. The system of claim 8 , wherein the control circuitry is operable to alter the frequency parameter during runtime based on a feedback signal.
10. The system of claim 1 , wherein each of the plurality of phase parameters has a phase offset relative to others of the phase parameters.
11. A system comprising:
time-tracking circuitry operable to generate a time-tracking value corresponding to time elapsed since a reference time;
phase parameter generation circuitry operable to:
receive the time-tracking value; and
receive a control signal that conveys a frequency parameter corresponding to a desired frequency of an oscillating signal; and
generate a phase parameter used for generation of the oscillating signal, wherein the generation of the phase parameter is based on the time-tracking value and the frequency parameter such that the oscillating signal maintains phase continuity across changes in the frequency parameter.
12. The system of claim 11 , wherein the time-tracking circuitry comprises a register operable to store the time-tracking value and increment the time-tracking value on each cycle of a clock.
13. The system of claim 11 , comprising signal generation circuitry operable to generate the oscillating signal based on the phase parameter.
14. The system of claim 13 , wherein the signal generation circuitry comprises a CORDIC circuit.
15. The system of claim 11 , wherein the phase parameter generation circuitry is operable to alter the phase parameter over time to achieve a frequency chirp.
16. The system of claim 11 , wherein the phase parameter generation circuitry is operable to:
receive a frequency chirp control signal; and
determine an amount by which to alter the phase parameter based on a value of a the frequency chirp control signal.
17. The system of claim 16 , comprising control circuitry operable to adjust the value of frequency chirp control signal during runtime based on a feedback signal.
18. The system of claim 11 , comprising control circuitry operable to generate the frequency parameter.
19. The system of claim 18 , wherein the control circuitry is operable to alter the frequency parameter during runtime based on a feedback signal.
20. The system of claim 11 , wherein the changes in the frequency parameter comprises changing the frequency parameter from a first value to a second value and then back to the first value.