Reader Apparatus Cancellation Circuit for Simultaneous RTF TTF Tag Reading

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Solution Overview

Problem

Existing reader apparatuses face challenges in efficiently reading both RTF and TTF tags simultaneously due to interference from ASK modulated waves, leading to increased reading time.

Innovation Solution

A reader apparatus is designed with a transmission unit to send query waves, a cancellation unit to remove ASK modulation components from response waves, and a decoding unit to accurately decode the response data from both RTF and TTF tags.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the reader transmits ASK modulated query waves to read RTF tags, then RTF tag reading is enabled, but the ASK modulation component interferes with TTF tag response decoding

Engineering Contradiction:

Improveability to read both RTF and TTF tagsVSAvoidresponse data decoding accuracy

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The cancellation unit extracts and removes the ASK modulation component from the received signal. By separating the harmful ASK modulation component from the TTF tag response signal, the system enables reliable decoding of TTF tag responses even when ASK modulated query waves are transmitted for RTF tag reading.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The cancellation unit acts as an intermediary between the received signal containing ASK modulation and the decoder. It processes the signal by removing the ASK modulation component before passing the cleaned signal to the decoder, thereby enabling accurate decoding without requiring separate reading periods for different tag types.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If separate reading periods are set for RTF and TTF tags to avoid interference, then decoding accuracy is maintained, but the total reading time increases

Engineering Contradiction:

Improveresponse data decoding accuracyVSAvoidtotal reading time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system enables continuous simultaneous reading of both RTF and TTF tags during the same time period. By removing the ASK modulation component in real-time, the cancellation unit allows both tag types to be read concurrently without requiring sequential reading periods, thereby reducing total reading time while maintaining decoding accuracy.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The cancellation unit dynamically adjusts the received signal by changing its parameter composition - specifically removing the ASK modulation component while preserving the TTF tag response signal characteristics. This parameter transformation enables accurate decoding from the modified signal.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the reader ignores TTF tag responses during RTF tag reading, then decoding errors are avoided, but reading efficiency decreases

Engineering Contradiction:

Improvedecoding accuracyVSAvoidreading efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

Instead of ignoring TTF tag responses during RTF reading, the cancellation unit converts the harmful ASK modulation component into a removable element. By actively canceling the ASK modulation, the system transforms the previously harmful interference into a manageable signal component that can be eliminated, allowing TTF tag responses to be successfully decoded during RTF tag reading operations.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS12271776B2Reader apparatus and control method with cancelation circuit

Publication Date: 2025.04.08 TOSHIBA TEC KK

AI summary

A reader apparatus includes a transmission circuit, a cancellation circuit, and a decoding circuit. The transmission circuit is configured to transmit a query wave that is obtained by modulating a carrier wave with a modulation signal representing a command to be transmitted to a first responder. The cancellation circuit is configured to cancel a modulation component corresponding to the modulation signal from a response wave transmitted using a backscattering method from a second responder different from the first responder. The decoding circuit is configured to decode data represented by the response wave from which the modulation component is canceled by the cancellation circuit.