Methods and apparatus for transponder oscillator with optimized timing
US9729359B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 2016 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Dec 28, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/033
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Circuitry includes: a resonant circuit for receiving a radio frequency signal; a rectifier outputting a first rectified signal matching a portion of the radio frequency signal and a second rectified signal having portion that matches the radio frequency signal and is out of phase with the first rectified signal; a clock regenerator circuit outputting a clock waveform corresponding to the first and second rectified signals; an oscillator timing circuit forming a first sloped waveform having a linear slope and a second sloped waveform having a linear slope, and comparators to compare the first sloped waveform and the second sloped waveform. The oscillator timing circuit outputs a master clock signal having transitions when the first and the second sloped waveform have equal magnitudes. A pluck pulse generator forms a pulse of a predetermined length when the master clock signal transitions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.