TRANSMIT/RECEIVE SWITCH

  • US 20090036065A1
  • Filed: 08/01/2007
  • Published: 02/05/2009
  • Est. Priority Date: 08/01/2007
  • Status: Active Grant
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First Claim
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1. A radio frequency integrated circuit (RFIC), comprising:

  • a transmitter module for converting an outgoing baseband signal to an outgoing RF signal, comprising a power amplifier (PA) transmitting the outgoing RF signal;

    a receiver module for converting an incoming RF signal to an incoming baseband signal, comprising a low noise amplifier (LNA) receiving the incoming RF signal; and

    a transmit/receive switch, coupled to the power amplifier (PA) and the low noise amplifier (LNA), comprising;

    an impedance matching circuit, coupled to the power amplifier (PA) and the low noise amplifier (LNA), for impedance matching the incoming and outgoing RF signals; and

    a voltage scaling circuit, coupled to the impedance matching circuit, the power amplifier (PA), and the low noise amplifier (LNA), attenuating the outgoing RF signal into a scaled signal, wherein the voltage of the scaled signal is within a breakdown voltage of a transistor in the low noise amplifier (LNA).

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