AI Patent Summary

Patent Document
#US6687293B1
United States Patent
Abstract
Aradio frequency identification (RFID) tag device having a pulse position modulation (PPM) decoder circuit which calculates a relative frequency relationship between an inter- nal oscillator of the RFID tag device and an external PPM source such as a RFID tag reader. The PPM decoder circuit is calibrated to the difference between the external PPM frequency source (i.e, RFID tag reader) and the internal clock-oscillator of the RFID tag device, which is performed in a single measurement during one calibration symbol period. 11 Claims, 8 Drawing Sheets 116 BIT To N_ be} winpow f+] SYNEOE L+ SYMBOL R| | COUNTER DATA 118 128 130
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Patent Classification & AI Product Mapping
Authoritative patent classification definitions mapped to real-world technology domains and commercial product categories.
CPC G06K19/00
Confidence: High
Official Definition
Record carriers for use with machines and with at least a part designed to carry digital markings
PHYSICS > COMPUTING OR CALCULATING; COUNTING > GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
AI Technology & Product Mapping
Technology Domain:
Automatic Identification and Data Capture (AIDC)
Product Category:
RFID Tags & Smart Labels
Plain-English Summary:
Physical objects and carriers, such as smart cards, labels, or tags, designed to store machine-readable digital data.
Relation to Claims:
The patent discloses an RFID tag device serving as a machine-readable data carrier designed to hold, process, and transmit digital identification information.
CPC G06K19/06
Confidence: High
Official Definition
Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
PHYSICS > COMPUTING OR CALCULATING; COUNTING > GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
AI Technology & Product Mapping
Technology Domain:
Digital Modulation & Signal Encoding
Product Category:
RFID Transponder ICs
Plain-English Summary:
Machine-readable data carriers classified by their specific data encoding format, modulation scheme, or signaling structure.
Relation to Claims:
The invention focuses on decoding pulse position modulation (PPM) data symbols received from an external RFID reader, defining the specific signaling and modulation format implemented on the carrier.
CPC G06K19/067
Confidence: High
Official Definition
Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
PHYSICS > COMPUTING OR CALCULATING; COUNTING > GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
AI Technology & Product Mapping
Technology Domain:
Embedded Circuitry & Hardware Transponders
Product Category:
RFID Inlays & Smart Cards
Plain-English Summary:
Data carriers that integrate electronic hardware elements, such as printed circuitry, resonant antenna circuits, or semiconductor dies.
Relation to Claims:
The patent describes an RFID device containing hardware circuitry, including an internal clock-oscillator and dedicated decoder logic implemented with semiconductor circuit elements.
CPC G06K19/07
Confidence: High
Official Definition
Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
PHYSICS > COMPUTING OR CALCULATING; COUNTING > GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
AI Technology & Product Mapping
Technology Domain:
Semiconductor Devices & Integrated Circuits
Product Category:
RFID Tag System-on-Chip (SoC) / ICs
Plain-English Summary:
Smart cards and data carriers containing integrated circuit (IC) chips to execute processing, timing, and memory tasks.
Relation to Claims:
The RFID tag features an integrated circuit that includes an internal clock-oscillator, symbol counters, and a pulse position modulation (PPM) decoder circuit for frequency calibration.
CPC G06K19/0723
Confidence: High
Official Definition
Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
PHYSICS > COMPUTING OR CALCULATING; COUNTING > GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
AI Technology & Product Mapping
Technology Domain:
Wireless & Contactless Identification (RFID)
Product Category:
Contactless RFID Transponders
Plain-English Summary:
Contactless smart carriers and RFID tags with integrated circuits designed specifically for wireless, non-contact radio communication.
Relation to Claims:
The patent describes an RFID transponder chip configured for wireless non-contact communication with an external reader, calibrating its internal oscillator against the wireless PPM signal in a single symbol period.