High speed CMOS transmit-receive antenna switch

A high-speed CMOS transmit-receive antenna switch comprises:

• a first transistor operably coupled to an antenna, to a transmit path, and to receive a T/R control signal, in which when the first transistor is active, the transmit path is switched on to the antenna to couple a transmit signal on the transmit path to the antenna;
• a second transistor operably coupled to the antenna, to a receive path, and to receive the T/R control signal, in which when the second transistor is active, the receive path is switched on to the antenna to couple a received signal from the antenna on to the receive path, and wherein when the T/R control signal is in a first state, the first transistor is active and the second transistor is inactive and, when the T/R control signal is in a second state, the second transistor is active and the first transistor is inactive;
• first compensation means operably coupled to the first transistor, wherein the first compensation means provides a corrective frequency response with respect to an adverse frequency response produces via parasitic components of the first transistor at operating frequencies of the high-speed CMOS transmit-receive antenna switch;
• and
• second compensation means operably coupled to the second transistor, wherein the second compensation means provides a second corrective frequency response with respect to an adverse frequency response produces via parasitic components of the second transistor at the operating frequencies of the high-speed CMOS transmit-receive antenna switch.

A radio frequency integrated circuit (RFIC) comprises:

• transmit section operably coupled to convert baseband data into outbound radio frequency (RF) signals based on a transmit local oscillation;
• receive section operably coupled to convert received RF signals into inbound baseband data based on a receive local oscillation;
• and
• transmit/receive switch operably coupled to the transmit section and the receive section, wherein the transmit/receive switch includes:
• a first transistor operably coupled to an antenna, to a transmit path, and to receive a T/R control signal, in which when the first transistor is active, the transmit path is switched on to the antenna to couple the outbound RF signals on the transmit path from the transmit section to the antenna;
• a second transistor operably coupled to the antenna, to a receive path, and to receive the T/R control signal, in which when the second transistor is active, the receive path is switched on to the antenna to couple the received RF signals from the antenna on to the receive path to the receive section, and wherein when the T/R control signal is in a first state, the first transistor is active and the second transistor is inactive and, when the T/R control signal is in a second state, the second transistor is active and the first transistor is inactive;
• and
• parasitic compensation network operably coupled to the first and second transistors, wherein the parasitic compensation network compensates for adverse affects of parasitic components of the first and second transistors at operating frequencies of the high-speed CMOS transmit-receive antenna switch.

A radio frequency integrated circuit (RFIC) comprises:

• transmit section operably coupled to convert baseband data into outbound radio frequency (RF) signals based on a transmit local oscillation;
• receive section operably coupled to convert received RF signals into inbound baseband data based on a receive local oscillation;
• and
• transmit/receive switch operably coupled to the transmit section and the receive section, wherein the transmit/receive switch includes:
• a first transistor operably coupled to an antenna, to a transmit path, and to receive a T/R control signal, in which when the first transistor is active, the transmit path is switched on to the antenna to couple the outbound RF signals on the transmit path from the transmit section to the antenna;
• a second transistor operably coupled to the antenna, to a receive path, and to receive the T/R control signal, in which when the second transistor is active, the receive path is switched on to the antenna to couple the received RF signals from the antenna on to the receive path to the receive section, and wherein when the T/R control signal is in a first state, the first transistor is active and the second transistor is inactive and, when the T/R control signal is in a second state, the second transistor is active and the first transistor is inactive;
• first compensation means operably coupled to the first transistor, wherein the first compensation means provides a corrective frequency response with respect to an adverse frequency response produces via parasitic components of the first transistor at operating frequencies of the high-speed CMOS transmit-receive antenna switch;
• and
• second compensation means operably coupled to the second transistor, wherein the second compensation means provides a second corrective frequency response with respect to an adverse frequency response produces via parasitic components of the second transistor at the operating frequencies of the high-speed CMOS transmit-receive antenna switch.