POWER SAVING IN A RADIO FREQUENCY MODEM
First Claim
1. A radio frequency (RF) modem comprising:
- a monitoring circuit;
an RF circuit having a demodulator, the RF circuit configured to receive RF signals;
a baseband processing unit configured to process baseband signals; and
a controller,the controller being operable to enter the RF modem into a sleep mode in which the monitoring circuit is operational and the RF circuit and the baseband processing unit are not operational, the controller being responsive to an indication from the monitoring circuit to control the RF modem to enter a monitoring mode in which the RF circuit is operational and the baseband processing unit is not operational, the RF circuit in the monitoring mode being configured for data reception, and the controller being further operable to control the RF modem to exit the monitoring mode and to enter a baseband processing mode in which the baseband processing unit is operational to process data signals provided by the RF circuit.
1 Assignment
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Accused Products
Abstract
A radio frequency (RF) modem for a mobile communications device comprises a monitoring circuit; an RF circuit having a demodulator, the RF circuit being for receiving RF signals; a baseband processing unit, for processing baseband signals; and a controller. The RF modem can enter a sleep mode in which the monitoring circuit is operational and the RF circuit and the baseband processing unit are not operational. The controller is responsive to an indication from the monitoring circuit to control the RF modem to enter a monitoring mode in which the RF circuit is operational and the baseband processing unit is not operational. The RF circuit is configured for data reception in the monitoring mode. The controller then controls the RF modem to exit the monitoring mode and to enter a baseband processing mode in which the baseband processing unit is operational to process data signals provided by the RF circuit.
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Citations
20 Claims
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1. A radio frequency (RF) modem comprising:
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a monitoring circuit; an RF circuit having a demodulator, the RF circuit configured to receive RF signals; a baseband processing unit configured to process baseband signals; and a controller, the controller being operable to enter the RF modem into a sleep mode in which the monitoring circuit is operational and the RF circuit and the baseband processing unit are not operational, the controller being responsive to an indication from the monitoring circuit to control the RF modem to enter a monitoring mode in which the RF circuit is operational and the baseband processing unit is not operational, the RF circuit in the monitoring mode being configured for data reception, and the controller being further operable to control the RF modem to exit the monitoring mode and to enter a baseband processing mode in which the baseband processing unit is operational to process data signals provided by the RF circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 20)
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10. The A method of operating a radio frequency (RF) modem the RF modem comprising:
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a monitoring circuit; an RF demodulator circuit configured to receive RF signals; a baseband processing unit configured to process baseband signals; and a controller, the method comprising; controlling the RF modem to enter a sleep mode in which the monitoring circuit is operational and the RF demodulator circuit and the baseband processing unit are not operational; controlling the RF modem to respond to an indication from the monitoring circuit by entering a monitoring mode in which the RF demodulator circuit is operational for data reception and the baseband processing unit is not operational; and controlling the RF modem to exit the monitoring mode and to enter a baseband processing mode in which the baseband processing unit is operational to process data signals provided by the RF demodulator circuit. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification