5G NR configurable wideband RF front-end LNA
AssigneepSemi Corporation
InventorsEmre Ayranci, Miles Sanner, Phanindra Yerramilli
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Abstract
Methods and devices addressing design of reconfigurable wideband LNAs to meet stringent gain, noise figure, and linearity requirements with multiple gain modes are disclosed. The disclosed teachings can be used to reconfigure RF receiver front-end to operate in various applications imposing stringent and conflicting requirements, such as 5G NR radios. Wideband and narrowband input and output matching with gain modes using a combination of the same hardware and a switching network are also disclosed.
Claims27
A Radio Frequency (RF) receiver front-end comprising:
- a reconfigurable low noise amplifier (LNA) block having an input matching network, and an LNA block output;
- an output matching network;
- and
- a switching network;
- wherein:
- a1. the RF receiver front-end is connectable to a load;
- b1. the switching network is connected to the input matching network, the LNA block and the output matching network;
- c1. the RF receiver front-end is configured to receive an input signal at an RF receiver front-end input, route the input signal through the LNA block, and deliver a corresponding output signal at an RF receiver front-end output connected to the load;
- d1. the switching network is configured to configure or reconfigure the RF receiver front-end while maintaining the input signal routed through the LNA block such that performance metrics of the RF receiver front-end meet one or more requirements comprising:
- one or more frequency ranges at which the RF receiver front-end receiver operates, or one or more receiver gain modes, wherein the one or more frequency ranges comprises at least one of a) a narrowband, b) an extended narrowband and c) a wideband frequency range and the one or more receiver gain modes comprises at least a first gain mode and a second gain mode, and
- e1. the RF receiver front-end is configured to operate in one or more of a first, second third, fourth, fifth and sixth state, wherein:
- a2. in the first state:
- the input matching network is configured to provide a narrowband input matching based on the narrowband frequency range;
- the output matching network is configured to provide a narrowband output matching based on the narrowband frequency range;
- the LNA block and the output matching network are configured to provide a receiver gain corresponding to the first gain mode;
- b2. in the second state:
- the input matching network is configured to provide the narrowband input matching based on the narrowband frequency range;
- the output matching network is configured to provide the narrowband output matching based on the narrowband frequency range;
- the LNA block and the output matching network are configured to provide the receiver gain corresponding to the second gain mode;
- c2. in the third state:
- the input matching network is configured to provide a wideband input matching based on the wideband frequency range;
- the output matching network is configured to provide a wideband output matching based on the wideband frequency range;
- the LNA block and the output matching network are configured to provide the receiver gain corresponding to the first gain mode;
- d2. in the fourth state:
- the input matching network is configured to provide the wideband input matching based on the wideband frequency range;
- the output matching network is configured to provide the wideband output matching based on the wideband frequency range;
- the LNA block and the output matching network are configured to provide the receiver gain corresponding to the second gain mode;
- e2. in the fifth state:
- the input matching network is configured to provide an extended narrowband input matching based on the wideband frequency range;
- the output matching network is configured to provide an extended narrowband output matching based on the wideband frequency range;
- the LNA block and the output matching network are configured to provide the receiver gain corresponding to the first gain mode;
- and
- f2. in the sixth state:
- the input matching network is configured to provide an extended narrowband input matching based on the wideband frequency range;
- the output matching network is configured to provide an extended narrowband output matching based on the wideband frequency range;
- the LNA block and the output matching network are configured to provide the receiver gain corresponding to the second gain mode.
A method of amplifying an input signal received at an RF receiver front-end input, comprising:
- providing an input matching network;
- providing an LNA block with an input matching network and an LNA block output;
- providing a switching network;
- providing an output matching network;
- routing the input signal from RF receiver front-end input, through the LNA block, and to an RF receiver front-end output;
- using the switching network to configure or reconfigure the input matching network, the LNA block, the output matching network, while maintaining the input signal routed through the LNA block, and such that the RF receiver front-end meets one or more requirements comprising at least a narrowband frequency range, a wideband frequency range, a first receiver gain mode and a second receiver gain mode;
- in a first state:
- configuring the input matching network to provide a narrowband input matching based on the narrowband frequency range;
- configuring the output matching network to provide a narrowband output matching based on the narrowband frequency range;
- configuring the LNA block and the output matching network to provide a receiver gain substantially equal to the first gain mode;
- in a second state:
- configuring the input matching network to provide a narrowband input matching based on the narrowband frequency range;
- configuring the output matching network to provide a narrowband output matching based on the narrowband frequency range;
- configuring the LNA block and the output matching network to provide a receiver gain substantially equal to the second gain mode;
- in a third state:
- configuring the input matching network to provide a wideband input matching based on the wideband frequency range;
- configuring the output matching network to provide a wideband output matching based on the wideband frequency range;
- configuring the LNA block and the output matching network to provide a receiver gain substantially equal to the first gain mode;
- in a fourth state:
- configuring the input matching network to provide a wideband input matching based on the wideband frequency range;
- configuring the output matching network to provide a wideband output matching based on the wideband frequency range;
- and
- configuring the LNA block and the output matching network to provide a receiver gain substantially equal to the second gain mode.
Dependencies are inferred from the claim text.