121973WO
`
`30
`
`CLAIMS
`
`1.
`
`An apparatus comprising:
`
`a first amplifier stage configured to receive and amplify an input radio frequency
`
`(RF) signal and provide a first output RFsignal to a first load circuit when thefirst
`
`amplifier stage is enabled,
`
`the input RF signal comprising transmissions sent on
`
`multiple carriers at different frequencies to a wireless device; and
`
`a second amplifier stage configured to receive and amplify the input RF signal
`
`and provide a second output RF signal to a second load circuit when the second
`
`amplifier stage is enabled.
`
`2:
`
`The apparatus of claim 1, the first amplifier stage comprising a first gain
`
`transistor coupled to a first cascode transistor, the second amplifier stage comprising a
`
`second gain transistor coupled to a second cascode transistor, and the input RF signal
`
`being provided to both the first and second gain transistors.
`
`31
`
`The apparatus of claim 2, the first amplifier stage further comprising a
`
`first inductor coupled to the first gain transistor, and the second amplifier stage further
`
`comprising a second inductor coupled to the second gain transistor.
`
`4.
`
`The apparatus of claim 2, the first and second gain transistors having
`
`sources coupled to circuit ground.
`
`3
`
`The apparatus of claim 2, the first and second amplifier stages providing
`
`the first and second output RFsignals in a first mode and providing the first output RF
`
`signal but not the second output RF signal in a second mode,
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`the first and second
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`cascode transistors being enabled in the first mode, and only one ofthe first and second
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`cascodetransistors being enabled in the second mode.
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`6.
`
`The apparatus of claim 5,
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`the first and second gain transistors being
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`applied the input RF signal in both the first mode and the second mode, and one ofthe
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`first and second gain transistors operating in a saturation region and the other one ofthe
`
`first and second gain transistors operating in a linear region in the second mode.
`
`(cid:42)(cid:49)(cid:51)(cid:19)(cid:17)(cid:18)(cid:26)(cid:14)(cid:17)(cid:17)047(cid:1)
`IPR2019-00047
`(cid:50)(cid:86)(cid:66)(cid:77)(cid:68)(cid:80)(cid:78)(cid:78)(cid:1)(cid:19)(cid:17)(cid:17)8(cid:13)(cid:1)(cid:81)(cid:15)(cid:18)
`Qualcomm 2008,p.1
`
`

`

`121973WO
`
`31
`
`7:
`
`The apparatus of claim 1, further comprising:
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`a feedback circuit coupled between an output and an inputofat least one ofthe
`
`first and second amplifier stages.
`
`8.
`
`The apparatus of claim 7, the feedback circuit comprising a resistor, or a
`
`capacitor, or both a resistor and a capacitor.
`
`9.
`
`The apparatus of claim 1, further comprising:
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`a first attenuation circuit coupled to the first amplifier stage and configured to
`
`receive the input RF signal; and
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`a second attenuation circuit coupled to the second amplifier stage and configured
`
`to receive the input RF signal.
`
`10.
`
`The apparatus ofclaim 1, further comprising:
`
`an attenuation circuit coupled to the first and second amplifier stages and
`
`configured to receive the input RFsignal.
`
`11.
`
`The apparatus of claim 1, further comprising:
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`an input matching circuit coupled to the first and second amplifier stages and
`
`configured to receive a receiver input signal and provide the input RF signal.
`
`12.
`
`‘The apparatus of claim 11, the input matching circuit being tunable and
`
`comprising at least one adjustable circuit component.
`
`13.
`
`The apparatus of claim 1, further comprising:
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`a third amplifier stage configured to receive and amplify a second input RF
`
`signal and provide the first output RF signal to the first load circuit when the third
`
`amplifier stage is enabled; and
`
`a fourth amplifier stage configured to receive and amplify the second input RF
`
`signal and provide the second output RF signal to the second load circuit when the
`
`fourth amplifier stage is enabled.
`
`(cid:42)(cid:49)(cid:51)(cid:19)(cid:17)(cid:18)(cid:26)(cid:14)(cid:17)(cid:17)047(cid:1)
`IPR2019-00047
`(cid:50)(cid:86)(cid:66)(cid:77)(cid:68)(cid:80)(cid:78)(cid:78)(cid:1)(cid:19)(cid:17)(cid:17)8(cid:13)(cid:1)(cid:81)(cid:15)2
`Qualcomm 2008, p.2
`
`

`

`121973WO
`
`14.
`
`The apparatusofclaim1,
`
`the first amplifier stage configured to receive and amplify the input RF signal or
`
`a second input RF signal and providethe first output RF signal to the first load circuit
`
`whenthefirst amplifier stage is enabled, and
`
`the second amplifier stage configured to receive and amplify the input RF signal
`
`or the second input RF signal and provide the second output RF signal to the second
`
`load circuit when the second amplifier stage is enabled.
`
`15.
`
`The apparatus of claim 2, the first amplifier stage further comprising a
`
`third gain transistor coupled to a third cascode transistor, the second amplifier stage
`
`further comprising a fourth gain transistor coupled to a fourth cascode transistor, and a
`
`second input RF signal being provided to both the third and fourth gain transistors.
`
`16.
`
`The apparatus of claim 14, further comprising:
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`a third amplifier stage configured to receive and amplify a third input RF signal
`
`or a fourth input RF signal and providethe first output RF signalto thefirst load circuit
`
`whenthe third amplifier stage is enabled; and
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`a fourth amplifier stage configured to receive and amplify the third input RF
`
`signal or the fourth input RF signal and provide the second output RF signal to the
`
`second load circuit when the fourth amplifier stage is enabled.
`
`17.
`
`A method comprising:
`
`amplifying a first input radio frequency (RF) signal with a first amplifier stage to
`
`obtain a first output RF signal when the first amplifier stage is enabled, the first input
`
`RF signal comprising transmissions sent on multiple carriers at different frequencies to
`
`a wireless device; and
`
`amplifying the first input RF signal or a second input RF signal with a second
`
`amplifier stage to obtain a second output RF signal when the second amplifier stage is
`
`enabled.
`
`18.
`
`The methodofclaim 17, further comprising:
`
`enabling the first and second amplifier stages in a first mode to obtain the first
`
`and second output RFsignals; and
`
`(cid:42)(cid:49)(cid:51)(cid:19)(cid:17)(cid:18)(cid:26)(cid:14)(cid:17)(cid:17)047(cid:1)
`IPR2019-00047
`(cid:50)(cid:86)(cid:66)(cid:77)(cid:68)(cid:80)(cid:78)(cid:78)(cid:1)(cid:19)(cid:17)(cid:17)8(cid:13)(cid:1)(cid:81)(cid:15)(cid:20)
`Qualcomm 2008,p.3
`
`

`

`121973WO
`
`33
`
`enabling the first amplifier stage and disabling the second amplifier stage in a
`
`second modeto obtain the first output RF signal but not the second output RF signal.
`
`19,
`
`An apparatus comprising:
`
`first means for amplifying configured to amplify a first input radio frequency
`
`(RF) signal and provide a first output RF signal when the first means for amplifying is
`
`enabled, the first input RF signal comprising transmissions sent on multiple carriers at
`
`different frequencies to a wireless device; and
`
`second meansfor amplifying configured to amplify the first input RFsignal or a
`
`second input RF signal and provide a second output RF signal when the second means
`
`for amplifying is enabled.
`
`20.
`
`The apparatus of claim 19, further comprising:
`
`means for enabling the first and second means for amplifying in a first mode to
`
`obtain the first and second output RF signals; and
`
`means for enabling the first means for amplifying and disabling the second
`
`means for amplifying in a second modeto obtain the first output RF signal but not the
`
`second output RF signal.
`
`(cid:42)(cid:49)(cid:51)(cid:19)(cid:17)(cid:18)(cid:26)(cid:14)(cid:17)(cid:17)047(cid:1)
`IPR2019-00047
`(cid:50)(cid:86)(cid:66)(cid:77)(cid:68)(cid:80)(cid:78)(cid:78)(cid:1)(cid:19)(cid:17)(cid:17)8(cid:13)(cid:1)(cid:81)(cid:15)(cid:21)
`Qualcomm 2008, p.4
`
`