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US 10,771,025 B1Granted
RFFE LNA topology supporting both noncontiguous intraband carrier aggregation and interband carrier aggregation
AssigneepSemi Corporation
InventorsEmre Ayranci, Miles Sanner, Phanindra Yerramilli
Life of this patent
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Abstract
A receiver topology for supporting various combinations of interband carrier aggregation (CA) signals, intraband non-contiguous CA and non-CA signals having different combinations of signals aggregated therein.
Claims23
A low noise amplifier (LNA) circuit having at least a first, second and third circuit input and having at least a first and second circuit output, the LNA circuit comprising:
- (a) a first LNA comprising a first cascode amplifier stage (CAS) having a CAS input and a CAS signal output, the CAS input coupled to the first circuit input:
- (b) a second LNA comprising a second CAS having a CAS input and a CAS signal output, the CAS input of the second CAS coupled to the third circuit input;
- and
- (c) a third LNA comprising a third CAS and fourth CAS, each having a CAS input and a CAS signal output, the CAS signal output of the third CAS and the CAS signal output of the first CAS coupled to the first circuit output, the CAS signal output of the second CAS and the CAS signal output of the fourth CAS coupled to the second circuit output, and the input of the third CAS and the input of the fourth CAS coupled to the second circuit input.
1 more element
A low noise amplifier (LNA) circuit having a first, second and third input circuit input and having a first circuit output and a second circuit output, the LNA circuit comprising:
- (a) a first LNA comprising a first CAS having a CAS input, a CAS signal output, an input transistor drain node and a degeneration output;
- (b) a second LNA comprising a second CAS having a CAS input, a CAS signal output, an input transistor drain node and a degeneration output;
- and
- (c) a third LNA comprising a first and second input transistor each input transistor having a first, second and third terminal:
- (1) the first terminal of the first input transistor of the third LNA coupled to the input transistor drain node of the first CAS;
- (2) the first terminal of the second input transistor of the third LNA coupled to the input transistor drain node of the second CAS;
- (3) the second terminal of the first input transistor of the third LNA coupled to the degeneration output of the first CAS;
- (4) the second terminal of the second input transistor of the third LNA coupled to the degeneration output of the second CAS;
- and
- (5) the third terminal of the first input transistor of the third LNA coupled to the third terminal of the second input transistor of the third LNA.
7 more elements
A front end circuit (FEC) for operation in one of four modes comprising:
- (a) a first LNA tuned to a first frequency and having an output coupled to a first FEC output;
- (b) a second LNA comprising two CASs, the first CAS tuned to a second frequency within a first frequency band and having an output coupled to the first FEC output, and the second CAS tuned to a third frequency within the first frequency band and having an output coupled to a second FEC output;
- and
- (c) a third LNA tuned to a fourth frequency within a second frequency band and having an output coupled to the second FEC output;
- wherein in the first mode coupling a non-carrier aggregated (non-CA) signal to an input of the first LNA and attaining an output signal at the first FEC output, in the second mode, coupling a non-CA signal to the third LNA and attaining the output from the second FEC output, in the third mode, coupling an interband CA signal to the input of both the first and the third LNA and attaining the output at both the first and second FEC output, and in the fourth mode, coupling an intraband non-contiguous CA signal to the inputs of both of the CASs of the second LNA and attaining the output at the first and second FEC output.
2 more elements
Dependencies are inferred from the claim text.