Abstract: Circuits and methods for reducing power consumption in a half-duplex transceiver are disclosed. In an embodiment, a power management circuit of half-duplex transceiver includes direct current to direct current (DC-DC) converter and snooze mode controller. The DC-DC converter includes switching circuit and driver circuit to drive the switching circuit. The DC-DC converter provides power supply to at least one element of a transmitter sub-system of the half-duplex transceiver, and operates in snooze control modes. The snooze mode controller is coupled to the DC-DC converter and configured to generate a control signal based on at least one transceiver operating input, where the control signal causes the DC-DC converter to operate in one of the snooze control modes, the snooze control modes corresponding to snooze duty cycles and where in each snooze control mode, the switching circuit and the driver circuit remain in an OFF-state based on a respective snooze duty cycle.

Abstract: Circuits and methods for reducing power consumption in a half-duplex transceiver are disclosed. In an embodiment, a power management circuit of half-duplex transceiver includes direct current to direct current (DC-DC) converter and snooze mode controller. The DC-DC converter includes switching circuit and driver circuit to drive the switching circuit. The DC-DC converter provides power supply to at least one element of a transmitter sub-system of the half-duplex transceiver, and operates in snooze control modes. The snooze mode controller is coupled to the DC-DC converter and configured to generate a control signal based on at least one transceiver operating input, where the control signal causes the DC-DC converter to operate in one of the snooze control modes, the snooze control modes corresponding to snooze duty cycles and where in each snooze control mode, the switching circuit and the driver circuit remain in an OFF-state based on a respective snooze duty cycle.

Abstract: A wireless device in a wireless network transmits a data frame even in the presence of in-band interference (from transmission of other devices) on a shared channel provided in the wireless network. In an embodiment, configuration data is provided to the wireless device indicating whether frames be transmitted (stomped) or not in the presence of such inband interference. If the configuration data indicates that the wireless device transmit in the presence of in-band interference, the wireless device transmits a frame if the transmitter of the interfering communication is determined to be from a different basic service set (BSS).

Abstract: Embodiments include frequency offset correction when decoding a packet encoded in a frequency modulated signal. Different symbols encoded in the packet may be corrected by different frequency offsets. In an embodiment, the frequency modulated signal is received on one of the signals of a multi-carrier signal (e.g., based on Orthogonal Frequency Domain Multiplexing, OFDM) and each packet is encoded according to 802.11(a) having the same long sequence repeating multiple times in a header portion. The repetitive sequence is used to compute the different offsets for different symbols.

Abstract: A multi-carrier (MC) receiver receives a multi-carrier signal containing data symbols as well as pilot symbols. The MC receiver estimates a carrier frequency offset in a downconverted base-band multi-carrier signal in the frequency domain based on deviations of one or more characteristics of the pilot signals from predetermined values, and corrects for the offset in the time domain. In an embodiment, a second order phase locked loop (PLL) estimates the phase of the pilot signals to determine the carrier frequency offset. Changes in pilot phases caused due to the time domain correction are cancelled to allow the PLL to minimize deviations from the lock position.

Abstract: Frequency offset correction when decoding a packet encoded in a frequency modulated signal. Different symbols encoded in the packet may be corrected by different frequency offsets. In an embodiment, the frequency modulated signal is received on one of the signals of a multi-carrier signal (e.g., based on Orthogonal Frequency Domain Multiplexing, OFDM) and each packet is encoded according to 802.11(a) having the same long sequence repeating multiple times in a header portion. The repetitive sequence is used to compute the different offsets for different symbols.

Abstract: A wireless device in a wireless network transmits a data frame even in the presence of in-band interference (from transmission of other devices) on a shared channel provided in the wireless network. In an embodiment, configuration data is provided to the wireless device indicating whether frames be transmitted (stomped) or not in the presence of such inband interference. If the configuration data indicates that the wireless device transmit in the presence of in-band interference, the wireless device transmits a frame if the transmitter of the interfering communication is determined to be from a different basic service set (BSS).

Abstract: A method of fabricating a semiconductor device which includes providing a silicon substrate having a patterned mask thereover to expose a portion of the surface of the substrate. The exposed surface portion is oxidized to form a sacrificial silicon oxide region to a predetermined depth in the substrate at the exposed portions of the substrate. The sacrificial silicon oxide is then removed by a HF etch and a second region of silicon oxide is formed in the substrate in the region from which the sacrificial silicon oxide was removed. The step of removing the silicon oxide also includes removing a portion of the pad oxide. The sacrificial silicon oxide has a thickness less than the second region of silicon oxide which is from about 10 percent to about 30 percent of the thickness of the second region of silicon oxide. The oxidation steps are thermal oxidation steps in an oxygen-containing ambient.