Low noise signal generator for use with an RFID system
US5955950A · kind A · utility
66Cited by
21References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1998 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Jul 24, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2477
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Noise reduction schemes are provided in a radio frequency identification (RFID) system for use with RFID intelligent tags. Amplitude and phase noise is minimized by starting with a low noise crystal oscillator having an output frequency which is an integer multiple n of the desired RF field frequency, and then dividing this frequency by the integer multiple n. One or more cascaded flip-flops are used for the frequency dividing. Both outputs of the final stage flip-flop are used to drive the transmitter antenna to produce a continuous wave signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.