Patent ID: 7688182
Filing Date: 2010-03-30
Classification: G06K

Abstract:
1. An integrated circuit chip, comprising: a rectifier circuit configured to convert an alternating voltage supplied from an antenna into a first direct-current voltage; a nonvolatile memory coupled to said rectifier circuit to operate by use of the first direct current voltage; a sensor circuit coupled to said rectifier circuit to operate by use of the first direct-current voltage to collect measurement data; a logic circuit configured to control said nonvolatile memory and said sensor circuit such that a write access operation of said nonvolatile memory and a data collecting operation of said sensor circuit are not performed concurrently; and a data modulation circuit configured to modulate the measurement data, wherein the write access operation of said nonvolatile memory is performed before the modulated measurement data is output via the antenna, wherein the write access operates by use of a second direct-current voltage, and the second direct-current voltage is lower than the first direct-current voltage.