Front end systems with linearized low noise amplifier and injection-locked oscillator power amplifier stage
First Claim
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1. A front end system comprising:
- a low noise amplifier in a receive path of the front end system, the low noise amplifier including a first inductor, an amplification circuit, and a second inductor magnetically coupled to the first inductor to provide negative feedback to linearize the low noise amplifier; and
a power amplifier in a transmit path of the front end system, the power amplifier including an injection-locked oscillator driver stage that includes a negative transconductance circuit electrically connected to an inductor-capacitor tank, the negative transconductance circuit configured to provide energy to the inductor-capacitor tank to maintain oscillation.
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Abstract
Front end systems and related devices, integrated circuits, modules, and methods are disclosed. One such front end system includes a low noise amplifier in a receive path and a power amplifier in a transmit path. The low noise amplifier includes a first inductor, an amplification circuit, and a second inductor magnetically coupled to the first inductor to provide negative feedback to linearize the low noise amplifier. The power amplifier includes an injection-locked oscillator driver stage. Other embodiments of front end systems are disclosed, along with related devices, integrated circuits, modules, methods, and components thereof.
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Citations
22 Claims
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1. A front end system comprising:
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a low noise amplifier in a receive path of the front end system, the low noise amplifier including a first inductor, an amplification circuit, and a second inductor magnetically coupled to the first inductor to provide negative feedback to linearize the low noise amplifier; and a power amplifier in a transmit path of the front end system, the power amplifier including an injection-locked oscillator driver stage that includes a negative transconductance circuit electrically connected to an inductor-capacitor tank, the negative transconductance circuit configured to provide energy to the inductor-capacitor tank to maintain oscillation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A front end system comprising:
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a low noise amplifier in a receive path of the front end system, the low noise amplifier including (i) an input matching circuit that includes a first inductor and a series inductor, the series inductor having a first end configured to receive a radio frequency signal and a second end electrically coupled to the first inductor;
(ii) an amplification circuit configured to receive the radio frequency signal by way of the first inductor; and
(iii) a second inductor magnetically coupled to the first inductor to provide negative feedback to linearize the low noise amplifier; anda power amplifier in a transmit path of the front end system, the power amplifier including an injection-locked oscillator driver stage. - View Dependent Claims (12, 13, 14, 15)
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16. A packaged front end module comprising:
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a low noise amplifier within a package, the low noise amplifier including a first inductor, a series inductor arranged in series with the first inductor, an amplification circuit configured to receive a receive radio frequency signal by way of the first inductor and the series inductor, and a second inductor magnetically coupled to the first inductor to provide negative feedback to linearize the low noise amplifier; a power amplifier within the package, the power amplifier including an injection-locked oscillator driver stage configured to receive a transmit radio frequency input signal and to generate an injection-locked radio frequency signal; and a radio frequency switch within the package, the radio frequency switch coupled to the low noise amplifier and the power amplifier. - View Dependent Claims (17, 18, 19)
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20. A wireless communication device comprising:
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a low noise amplifier in a receive path, the low noise amplifier including a first inductor, an amplification circuit, and a second inductor magnetically coupled to the first inductor to provide negative feedback to linearize the low noise amplifier; a power amplifier in a transmit path, the power amplifier including an injection-locked oscillator driver stage that includes a negative transconductance circuit electrically connected to an inductor-capacitor tank, the negative transconductance circuit configured to provide energy to the inductor-capacitor tank to maintain oscillation; an antenna; and a radio frequency switch configured to electrically couple the antenna to the transmit path in a first state and to electrically couple the antenna to the receive path in a second state. - View Dependent Claims (21, 22)
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Specification