Optimized multi-LNA solution for wideband auxiliary inputs supporting multiple bands
First Claim
Patent Images
1. A low noise amplifier integrated circuit (LNAIC) comprising:
- a first low noise amplifier (LNA) having an input and an output;
a second LNA having an input and an output;
a first input select switch having at least two inputs, at least one input being an auxiliary (AUX) input, the input select switch configured to couple at least one of the inputs to the first LNA input; and
an second input select switch having at least two inputs, including at least one AUX input, the second input select switch configured to couple at least one of the inputs to the second LNA input;
wherein the AUX input of the first select switch is coupled to the AUX input of the second select switch.
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Abstract
A high performance low noise amplifier integrated circuit having multiple low noise amplifiers enabling operation over a wide range for frequencies is disclosed. In particular, an auxiliary input is provided to the low noise amplifier integrated circuit that can be routed to one of several low noise amplifiers, each tuned to operate efficiently in different frequency ranges.
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Citations
15 Claims
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1. A low noise amplifier integrated circuit (LNAIC) comprising:
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a first low noise amplifier (LNA) having an input and an output; a second LNA having an input and an output; a first input select switch having at least two inputs, at least one input being an auxiliary (AUX) input, the input select switch configured to couple at least one of the inputs to the first LNA input; and an second input select switch having at least two inputs, including at least one AUX input, the second input select switch configured to couple at least one of the inputs to the second LNA input; wherein the AUX input of the first select switch is coupled to the AUX input of the second select switch. - View Dependent Claims (2, 3)
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4. A low noise amplifier integrated circuit (LNAIC) comprising:
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an LB low noise amplifier (LNA) tuned for operation in an LB frequency range and having an input and an output; an HB LNA tuned for operation in a corresponding HB frequency range and having an input and an output; an LB band-select switch having at least one input configured to be coupled to an auxiliary (AUX) input of a front-end module, the LB band-select switch including an first switch coupled between the AUX input and the LB LNA, wherein the first switch is closed upon receiving, at the AUX input, signals within the LB frequency range; and an HB band-select switch having at least one input coupled to the AUX input, the HB band-select switch including a first switch coupled between the AUX input and the corresponding HB LNA, wherein the first switch is closed upon receiving, at the AUX input, signals within the HB frequency range. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A method for efficiently amplifying signals coupled to an auxiliary (AUX) input of a front-end module, including:
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providing an AUX input to the front-end module; providing a low band (LB) band-select switch and a high band (HB) band-select switch; coupling the AUX input to an input of both the LB band-select switch and the HB band-select switch; providing an LB low noise amplifier (LNA) tuned to operate in an LB frequency range and a HB LNA tuned to operate in an HB frequency range; controlling the LB band-select switch and the HB band-select switch to route signals applied to the AUX input to one of the LB LNA or the HB LNA. - View Dependent Claims (12, 13, 14, 15)
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Specification