Indentification reader

• US 20030090367A1
• Filed: 09/30/2002
• Published: 05/15/2003
• Est. Priority Date: 12/20/2000
• Status: Abandoned Application

• Current Assignee: Gallaher Group Limited (Government of Japan)
• Original Assignee: Gallaher Group Limited (Government of Japan)
• Inventors: Pauley, James Donald, OʼByrne, Hugh Donal, Carroll, Gary Thomas
• Application Number:
  US10/259,750
• Publication Number:
  US 20030090367A1
• Time in Patent Office: Days
• US Class Current: 340/10.4
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer

Abstract

The present invention relates to an identification reader including decoding means capable of decoding signals having differing modulation means.

Claims

1. An identification reader including decoding means capable of decoding signals having differing modulation means.

2. An identification reader as claimed in claim 1 which decodes signals in the radio frequency range.

3. An identification reader as claimed in claim 1 capable of decoding two or more modulation means from ASK, FSK and PSK schemes.

4. An identification reader as claimed in claim 1 which incorporates a broad spectrum bandpass filter.

5. An identification reader as claimed in claim 4 wherein the carrier or data frequency the bandpass amplifier will pass is in the order of 150 Hz to 125 kHz.

6. An identification reader as claimed in claim 4 wherein the amplifier has low gain at low frequencies and high gain at high frequencies.

7. An identification reader as claimed in claim 1 which includes a microprocessor to decode the incoming bitstream and find a synchronisation character.

8. An identification reader as claimed in claim 7 which includes a decoder which calculates which modulation means is being used before the microprocessor is used to find the synchronisation character in that modulation means.

9. An identification reader as claimed in claim 1 wherein the value of the subharmonic of the modulation signal to the carrier signal determines which modulation means is to be decoded.

10. A decoding means for use in an identification reader as claimed in claim 1.