TRANSMIT/RECEIVE SWITCH
First Claim
Patent Images
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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Abstract
A radio frequency (RF) transmit/receive switch. The transmit/receive switch comprises an impedance matching circuit and a voltage scaling circuit. The impedance matching circuit matches an incoming RF signal to a low noise amplifier and an outgoing RF signal from a power amplifier. The voltage scaling circuit, coupled to the impedance matching circuit, the power amplifier, and the low noise amplifier, attenuates the outgoing RF signal to a scaled signal within a breakdown voltage of a transistor device in the low noise amplifier during transmission of the outgoing RF signal.
301 Citations
20 Claims
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1. A radio frequency integrated circuit (RFIC), comprising:
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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). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A transmit/receive switch, coupled to a power amplifier (PA) and a low noise amplifier (LNA) of a RFIC, comprising:
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an impedance matching circuit, providing impedance matching an incoming RF signal to a low noise amplifier (LNA) and an outgoing RF signal from a power amplifier (PA); 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). - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification