’734 Patent – Claim 1
`
`1. A Radio Frequency Identification (RFID)
`integrated circuit (IC) comprising:
`an antenna port configured to be coupled to
`an antenna and a variable impedance;
`a first oscillator configured to provide a first
`clock frequency;
`a second oscillator configured to provide a
`second clock frequency; and
`
`a tuning circuit coupled to and configured to
`tune the variable impedance, wherein the IC
`is configured to:
`determine that tuning of the variable
`impedance is to occur;
`select the first oscillator to use for the tuning;
`extract a first power from an RF wave
`incident on the antenna insufficient for the IC
`to fully operate;
`cause the tuning circuit to tune, using the first
`clock frequency from the first oscillator, the
`variable impedance to increase the power
`extracted from the RF wave; and
`
`after the tuning circuit tunes the variable
`impedance:
`
`extract a second power from the RF wave
`sufficient for the IC to fully operate;
`select the second oscillator to use for IC
`operation; and
`operate using the second clock frequency
`from the second oscillator.
`
`’266 Patent – Corresponding Language in
`Claims 6, 8, and 10
`[Claim 6] A Radio Frequency Identification
`(RFID) integrated circuit (IC) … comprising:
`
`[Claim 10] a first clock oscillator configured
`to provide the first clock frequency;
`[Claim 10] a second clock oscillator
`configured to provide the second clock
`frequency.
`[Claim 6] a tuning circuit configured to tune
`the variable impedance during a tuning phase;
`and
`
`[Claim 6] extract a first power at least equal
`to the SPTT from an RF wave;
`
`[Claim 6] cause the tuning circuit to tune the
`variable impedance to increase power
`extraction from the RF wave; and
`[Claim 6] operate at a first clock frequency
`less than the MFOP while causing the tuning
`circuit to tune the variable impedance,
`[Claim 6] in a protocol phase subsequent to
`the tuning phase;
`[Claim 8] initially operate in the tuning phase;
`and subsequently operate in the protocol
`phase
`[Claim 6] extract a second power at least
`equal to the SPOI from the RF wave;
`
`[Claim 6] operate at a second clock frequency
`greater than or equal to the MFOP;
`
`NXP EX 1021
`NXP v. Impinj
`
`