Patent ID: 11916577
Assignee: SKYWORKS SOLUTIONS, INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A duplexer circuit comprising:
a first transmit filter configured to receive a radio frequency transmit signal from a power amplifier, and a first receive filter configured to receive, via the first transmit filter, a leakage signal caused by the radio frequency transmit signal;
a first low-noise amplifier configured to receive the leakage signal from the first receive filter and amplify the leakage signal;
a cancellation path configured to receive the radio frequency transmit signal from the power amplifier;
a second low-noise amplifier configured to receive a cancellation signal caused by the radio frequency transmit signal travelling through the cancellation path; and
a phase shifter configured to apply a phase shift to one or both of the leakage signal and the cancellation signal.