Patent ID: 10009052

Abstract:
RF filtering circuitry includes a first transmit signal node, a second transmit signal node, a common node, first transmit signal filtering circuitry, second transmit signal filtering circuitry, and transmit signal cancellation circuitry. The first transmit signal filtering circuitry is coupled between the first transmit signal node and the common node and is configured to pass RF transmit signals within a first transmit signal frequency band while attenuating signals outside the first transmit signal frequency band. The second transmit signal filtering circuitry is coupled between the second transmit signal node and the common node and is configured to pass RF transmit signals within a second transmit signal frequency band while attenuating signals outside the second transmit signal frequency band. The transmit signal cancellation circuitry is coupled between the common node and the second transmit signal node and is configured to generate a transmit cancellation signal.