Frequency diverse discrete-time phase-lock device and apparatus
US7893775B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2008 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Jun 11, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/093
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A discrete-time phase lock loop (DTPLL) includes an analog section comprising a digital-to-analog converter (DAC) and an oscillator, operative to provide a clock signal based on an input from the DAC. The DTPLL also includes a digital signal processor (DSP). The DSP includes a loop controller state machine; a phase detector; a counter, operative to receive clock signals from the oscillator and to provide a count value to the phase detector; a divider, operative to receive a reference signal and to provide a reference pulse output to the phase detector; and a loop filter operative to provide a control effort value based on an output from the phase detector. Based on the phase error value, an output of the oscillator is changed to reduce the phase error to a steady state value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.