Minimum power, feedback controller, transmit/receive switch
AssigneeMotorola, Inc.
InventorRobert P. Muszkiewicz
Life of this patent
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Abstract
A transmit/receive switch incorporating a latching relay in a feedback circuit so that the relay is energized only when it is commanded into a different mode (transmit or receive) than it is in, and the energization is removed as soon as the relay switches into the correct mode.
Claims12
In a transceiver comprising an antenna and transmitting and receiving devices alternatively sharing use of said antenna by switching means controllable to selectively couple a selected one of said transmitting and receiving devices to said antenna in response to a selected transmit/receive control signal from a control signal source, the improvement for minimizing power consumption by said switching means and for assuring that the selected device is coupled to said antenna in response to said control signal comprising:
- logic means coupled to the source of said transmit/receive control signal and to said switching means for comparing the status of said switching means with said control signal and actively energizing said switching means only when its status disagrees with the status commanded by said transmit/receive control signal.
Dependencies are inferred from the claim text.