Wireless transceiver and method of operating the same
First Claim
1. A transceiver for use in a wireless device, comprising:
- an antenna;
a transmitter circuit configured to generate a wireless signal for transmission;
a transmitter amplifier connected between the antenna and the transmitter circuit, the transmitter amplifier configured to have an operational transmitter output impedance when the transceiver is in a transmit mode and an isolation transmitter output impedance when the transceiver is in a receive mode;
a receiver circuit configured to receive and process a wireless signal received at the antenna;
a receiver amplifier connected between the antenna and the receiver circuit, the receiver amplifier configured to have an operational receiver input impedance when the transceiver is in a receive mode and an isolation receiver input impedance when the transceiver is in a transmit mode, wherein the isolation transmitter output impedance is greater than the operational receiver input impedance, and wherein the isolation receiver input impedance is greater than the operational transmitter output impedance.
30 Assignments
0 Petitions
Accused Products
Abstract
A transceiver 400 is provided in an ultrawide bandwidth device, which includes an antenna 110, a transmitter circuit 145, and a receiver circuit 165. A transmitter amplifier 440 is provided between the antenna 110 and the transmitter circuit 145, and is configured to have an operational transmitter output impedance when the transceiver 400 is in a transmit mode and an isolation transmitter output impedance when the transceiver 400 is in a receive mode. A receiver amplifier 460 is provided between the antenna 110 and the receiver circuit 165, and is configured to have an operational receiver input impedance when the transceiver 400 is in a receive mode and an isolation receiver input impedance when the transceiver 400 is in a transmit mode. The isolation transmitter output impedance is greater than the operational receiver input impedance, and the isolation receiver input impedance is greater than the operational transmitter output impedance. Thus, a transmitter and receiver can be isolated without using a transmit/receive switch.
10 Citations
22 Claims
-
1. A transceiver for use in a wireless device, comprising:
-
an antenna;
a transmitter circuit configured to generate a wireless signal for transmission;
a transmitter amplifier connected between the antenna and the transmitter circuit, the transmitter amplifier configured to have an operational transmitter output impedance when the transceiver is in a transmit mode and an isolation transmitter output impedance when the transceiver is in a receive mode;
a receiver circuit configured to receive and process a wireless signal received at the antenna;
a receiver amplifier connected between the antenna and the receiver circuit, the receiver amplifier configured to have an operational receiver input impedance when the transceiver is in a receive mode and an isolation receiver input impedance when the transceiver is in a transmit mode, wherein the isolation transmitter output impedance is greater than the operational receiver input impedance, and wherein the isolation receiver input impedance is greater than the operational transmitter output impedance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A transceiver amplifier, comprising:
-
a first transistor having a control terminal connected to a first node, a first terminal connected to a second node, and a second terminal connected to a third node;
a current source for providing a reference current to the first transistor;
a first resistor connected between the second node and the first node for providing a bias voltage to the control terminal;
a second resistor connected between the second node and a reference voltage;
a first switch connected between the third terminal and ground; and
a second switch connected between the third terminal and the reference voltage;
wherein the current source is turned on when a control signal has a first value and is turned off when the control signal has a second value, wherein the first switch is closed when the control signal has the first value and is open when the control signal has the second value, and wherein the second switch is open when the control signal has the first value and is closed when the control signal has the second value. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
-
21. A method of operating a transceiver having a transmitter portion and a receiver portion, the method comprising:
-
determining whether the transceiver is in a transmit mode or a receive mode;
setting an actual receiver input impedance for the receiver portion to an operational receiver input impedance if the transceiver is determined to be in the receive mode;
setting an actual transmitter output impedance for the transmitter portion to an isolation transmitter output impedance if the transceiver is determined to be in the receive mode;
setting an actual receiver input impedance for the receiver portion to an isolation receiver input impedance if the transceiver is determined to be in a transmit mode; and
setting an actual transmitter output impedance for the transmitter portion to an operational transmitter output impedance if the transceiver is determined to be in the transmit mode, wherein the isolation receiver input impedance is greater than the operational transmitter output impedance, and wherein the isolation transmitter output impedance is greater than the operational receiver input impedance. - View Dependent Claims (22)
-
Specification