Title:
パルス位置変調(PPM)デコーダをPPM信号に対して較正するための方法、システムおよび装置
Document Type and Number:
Japanese Patent JP2004502176
Kind Code:
A
Abstract:
A radio frequency identification (RFID) tag device having a pulse position modulation (PPM) decoder circuit which calculates a relative frequency relationship between an internal 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.
Inventors:
Alexander, Samuel E.
Royer, Stephen Earl.
Royer, Stephen Earl.
Application Number:
JP2002506127A
Publication Date:
January 22, 2004
Filing Date:
June 20, 2001
Export Citation:
Assignee:
MICROCHIP TECHNOLOGY INCORPORATED
International Classes:
G01S13/78; G06K19/07; H04B14/02; G01S13/76; (IPC1-7): G01S13/78
Attorney, Agent or Firm:
Hidesaku Yamamoto