System with transmit-receive switch
A system with a transmit-receive switch. In some embodiments, the system includes a composite switch. The composite switch may have a common port, a transmit port, and a receive port. The composite switch may include a first simple switch coupled between the common port and the receive port; and a second simple switch coupled between the common port and the transmit port. The first simple switch may be a four-quadrant switch, or the second simple switch may include a field effect transistor, and an isolated gate driver connected to the gate of the field effect transistor.
1 . A system, comprising:
a composite switch,
the composite switch having a common port, a transmit port, and a receive port, and comprising:
a first simple switch coupled between the common port and the receive port; and
a second simple switch coupled between the common port and the transmit port,
the composite switch being configured:
in a first state, to couple the receive port and the common port and to isolate the transmit port, and
in a second state, to couple the transmit port and the common port and to isolate the receive port,
wherein:
the first simple switch is a four-quadrant switch; or
the second simple switch comprises:
a field effect transistor, and
an isolated gate driver connected to the gate of the field effect transistor.
2 . The system of claim 1 , wherein the first simple switch comprises two field effect transistors.
3 . The system of claim 1 , wherein the first simple switch comprises a dual-gate field effect transistor.
4 . The system of claim 3 , wherein the composite switch further comprises a fourth simple switch.
5 . The system of claim 4 , wherein the fourth simple switch is connected in shunt with the transmit port.
6 . The system of claim 5 , wherein the fourth simple switch is a four-quadrant switch.
7 . The system of claim 1 , wherein the composite switch further comprises a third simple switch.
8 . The system of claim 7 , wherein the third simple switch is connected in shunt with the receive port.
9 . The system of claim 1 , wherein the composite switch further comprises a fourth simple switch.
10 . The system of claim 9 , wherein the fourth simple switch is connected in shunt with the transmit port.
11 . The system of claim 10 , wherein the fourth simple switch is a four-quadrant switch.
12 . The system of claim 1 , further comprising a control circuit configured to cause:
in the first state, the first simple switch to be closed and the second simple switch to be open; and
in the second state, the second simple switch to be closed and the first simple switch to be open.
13 . The system of claim 12 , wherein the composite switch further comprises a third simple switch.
14 . The system of claim 13 , wherein the third simple switch is connected in shunt with the receive port.
15 . The system of claim 14 , wherein the control circuit is configured to cause:
in the first state, the third simple switch to be open; and
in the second state, the third simple switch to be closed.
16 . The system of claim 15 , wherein the composite switch further comprises a fourth simple switch.
17 . The system of claim 16 , wherein the fourth simple switch is connected in shunt with the transmit port.
18 . The system of claim 17 , wherein the fourth simple switch is a four-quadrant switch comprising an isolated gate driver.
19 . The system of claim 18 , wherein the control circuit is configured to cause:
in the first state, the fourth simple switch to be closed; and
in the second state, the fourth simple switch to be open.
20 . The system of claim 12 , wherein the composite switch further comprises a fourth simple switch, connected in shunt with the transmit port.
21 . The system of claim 1 , wherein the first simple switch is a four-quadrant switch, the four-quadrant switch comprising an isolated gate driver.
22 . The system of claim 1 , wherein the second simple switch comprises:
a field effect transistor, and
an isolated gate driver connected to the gate of the field effect transistor.