Radio Frequency Identification Devices
First Claim
1. A radio frequency identification (RFID) device comprising:
- a contactless internal voltage generator configured to generate a rectification voltage responsive to a radio frequency (RF) input signal and an internal voltage responsive to the generated rectification voltage and a reference voltage;
a clock generator configured to sense an amount of current to a sink path of the contactless internal voltage generator and to generate a clock signal using a variable resistance value, the variable resistance value based on the amount of current sensed; and
an internal circuit driven by the internal voltage and the clock signal.
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Accused Products
Abstract
Radio frequency identification (RFID) devices are provided including a contactless internal voltage generator configured to generate a rectification voltage responsive to a radio frequency (RF) input signal and an internal voltage responsive to the generated rectification voltage and a reference voltage; a clock generator configured to sense an amount of current to a sink path of the contactless internal voltage generator and to generate a clock signal using a variable resistance value, the variable resistance value based on the amount of current sensed; and an internal circuit driven by the internal voltage and the clock signal.
8 Citations
19 Claims
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1. A radio frequency identification (RFID) device comprising:
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a contactless internal voltage generator configured to generate a rectification voltage responsive to a radio frequency (RF) input signal and an internal voltage responsive to the generated rectification voltage and a reference voltage; a clock generator configured to sense an amount of current to a sink path of the contactless internal voltage generator and to generate a clock signal using a variable resistance value, the variable resistance value based on the amount of current sensed; and an internal circuit driven by the internal voltage and the clock signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A radio frequency identification (RFID) device comprising:
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a contactless internal voltage generator configured to generate a rectification voltage responsive to an input of a radio frequency (RF) signal and an internal voltage based on the rectification voltage and a reference voltage in response to an enable signal; a contact internal voltage generator configured to generate the internal voltage based on a power supply voltage externally provided and the reference voltage in response to the enable signal; a power switch configured to generate the enable signal when one of the rectification voltage is generated and the power supply voltage is received; and a logic circuit driven by the internal voltage. - View Dependent Claims (14, 15)
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- 16. A radio frequency identification (RFID) device comprising a clock generator configured to sense an amount of current to a sink path of a contactless internal voltage generator and to generate a clock signal using a variable resistance value, the variable resistance value based on the amount of current sensed.
Specification