COMPENSATION OF LOCAL OSCILLATOR PHASE JITTER
2 Assignments
0 Petitions
Accused Products
Abstract
Digital logic circuitry is disclosed. The circuitry includes local oscillator drift and phase compensation logic that compensates the frequency drift and the phase noise of a local oscillator generated by a digitally controlled oscillator.
4 Citations
21 Claims
-
1. (canceled)
-
2. A method for generating a local oscillator output, the method comprising:
-
receiving an intermediate frequency input, a reference clock input, and a local oscillator feedback input; generating a filtered version of the reference clock input; generating a phase error correction signal based at least in part on the filtered version of the reference clock input and a phase of the local oscillator feedback input; generating the local oscillator output based at least in part on the intermediate frequency input and the phase error correction signal; and providing the local oscillator output. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 20, 21)
-
-
12. A method for recovering information from a communications channel, the method comprising:
-
receiving the communications channel, an intermediate frequency, a reference clock input, and a local oscillator feedback input; generating a filtered version of the reference clock input; generating a phase error correction signal based at least in part on the filtered version of the reference clock input and a phase of the local oscillator feedback input; generating the local oscillator output based at least in part on the intermediate frequency input and the phase error correction signal; down converting the communications channel to the intermediate frequency based at least in part on the local oscillator output; and determining a digital representation of the down converted communications channel at least in part by sampling the down converted communications channel. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
-
Specification