Patent ID: 7245887
Filing Date: 2007-07-17
Classification: H04B

Abstract:
1. An apparatus comprising: a first transistor coupled to an antenna, to a transmit path, and to receive a transmit/receive (T/R) control signal; a second transistor coupled to the antenna, to a receive path, and to receive the T/R control signal, wherein when the T/R control signal is in a first state, the first transistor is active to couple the transmit path to the antenna and the second transistor is inactive and, when the T/R control signal is in a second state, the second transistor is active to couple the receive path to the antenna and the first transistor is inactive; and parasitic compensation network coupled to the first and second transistors to compensate for parasitic effects at operating frequencies of the first and second transistors, the parasitic compensation network including a first inductor coupled to a first node between the first transistor and the transmit path and to AC ground, second inductor coupled to a second node between the second transistor and the receive path and to the AC ground, and a third inductor coupled to a third node between the first transistor, the second transistor and the antenna and to the AC ground.