Abstract:
The present invention provides a condenser microphone. In one embodiment, the condenser microphone comprises: a frame of the microphone formed of a circuit board substrate and a casing, and an amplifier device, an elastic holding component and capacitance components provided inside the microphone. One or more sound holes are provided on the circuit board substrate or the casing. The capacitance components are provided on the side with the sound holes. The amplifier device is provided on the side opposite to the side with the sound holes. The elastic holding component is provided on the side with the amplifier device or on the side with the capacitance components. The amplifier device and the capacitance components are both electrically connected to the circuit board substrate; and one or more auxiliary supporting parts are provided on the elastic holding component with the vertical height thereof being greater than that of the amplifier device and less than the distance between the capacitance components and the opposite inner wall of the microphone. When the microphone according to the present invention is sharply accelerated or under an impact, a collision between the amplifier device and the backplate caused by excessive deformation of the elastic holding component and a reduction in the resilience of the elastic holding component can be prevented with the help of the auxiliary supporting parts.
Abstract:
To improve the performance of DSL modems, a DSL duplexing ratio for a new communication is selected according to the communications needs of an application. A required upstream and downstream bit rate for application communications is determined. From the ratio of these bit rates, a desired duplexing ratio is calculated. The operation of the modem is then adapted to choose a duplexing ratio that approximates the desired duplexing ratio for the application. To optimize modem operation, the size and position of the upstream and downstream bandwidths used for transmission are intelligently selected when the bit rate necessary for making the transmission is less than the total available bandwidth provided by the chosen duplexing ratio. By intelligently selecting a minimum number of subcarriers for Digital Multi-tone (DMT) signal transmission, a reduction in line driver power consumption is effectuated. Additionally, by intelligently selecting the position of the used bandwidth within the total available bandwidth, near-end crosstalk (NEXT) noise may be minimized.
Abstract:
The invention relates to a transmitter identification system, which utilizes an identification signal embedded into a digital television signal, enabling the transmitter of origin to be identified at a receiving station. Ideally the identification signal is an orthogonal pseudo-random sequence time synchronized to the signal frame structure of the digital television signal. Particularly designed for single frequency networks, identification of the various transmitted signals enables the network to be tuned to eliminate or minimize multi-path effects at certain locations, which receive transmissions from various transmitters.
Abstract:
The invention relates to a transmitter identification system, which utilizes an identification signal embedded into a digital television signal, enabling the transmitter of origin to be identified at a receiving station. Ideally the identification signal is an orthogonal pseudo-random sequence time synchronized to the signal frame structure of the digital television signal. Particularly designed for single frequency networks, identification of the various transmitted signals enables the network to be tuned to eliminate or minimize multi-path effects at certain locations, which receive transmissions from various transmitters.
Abstract:
Methods and systems that enable payload data to be spread over a number of a plurality of sub-carriers for wireless transmissions between Access Points (AP) and stations (STA) in a WLAN. The AP receives each STA's status information, and controls an amount of spreading of the payload data that can flexibly and variably takes into account the desired amount of peak power consumption, the required data rate, and the channel conditions. Based on these factors, the AP determines a number of sub-carriers for each STA that will be used to carry the spread payload data. Example embodiments can address high power peak consumption, data rate inflexibility and inefficient spectrum communication as found in conventional wireless systems.
Abstract:
Methods and systems for scheduling successive transmissions in a wireless local area network (WLAN). An Access Point (AP) can generate a control signal that includes an identifier field for indicating that previous resource allocation from a previous transmission is to be repeated, and therefore the control signal itself does not contain resource allocation information. One or more stations (STAs) can receive the control signal and can use the previous resource allocation information stored in their respective memory to perform the transmission. The resource allocation can include three-dimensional (3D) resource allocation, which refers to time, frequency and space-domain multiplexing. Because the control signal has the identifier field, the AP can reduce network load and free resources for payload data or other traffic.
Abstract:
The invention provides a method and device for iterative hybrid time-frequency domain block equalization of signals received via a communication channel subject to multipath interference. The equalization method includes frequency-domain equalization of blocks of received signals in a forward path, and time-domain inter-block echo correction and intra-block cyclic echo addition in the feedback path. The invention can be used for equalizing signals transmitted without cyclic prefix and subjected to multi-path interference with long delay spread.
Abstract:
The present invention provides a condenser microphone. In one embodiment, the condenser microphone comprises: a frame of the microphone formed of a circuit board substrate and a casing, and an amplifier device, an elastic holding component and capacitance components provided inside the microphone. One or more sound holes are provided on the circuit board substrate or the casing. The capacitance components are provided on the side with the sound holes. The amplifier device is provided on the side opposite to the side with the sound holes. The elastic holding component is provided on the side with the amplifier device or on the side with the capacitance components. The amplifier device and the capacitance components are both electrically connected to the circuit board substrate; and one or more auxiliary supporting parts are provided on the elastic holding component with the vertical height thereof being greater than that of the amplifier device and less than the distance between the capacitance components and the opposite inner wall of the microphone. When the microphone according to the present invention is sharply accelerated or under an impact, a collision between the amplifier device and the backplate caused by excessive deformation of the elastic holding component and a reduction in the resilience of the elastic holding component can be prevented with the help of the auxiliary supporting parts.
Abstract:
A miniature microphone is provided. In one embodiment, the miniature microphone comprises: a circuit board substrate at the upper part of the miniature microphone, wherein a plurality of contact pads are configured at prescribed positions on one side of the circuit board substrate and one or more electrical components are installed on the other side thereof; a protection frame with a cavity in the central portion thereof, wherein one or more components are installed inside the cavity, the outer side of the protection frame forms the body portion, a first metal shielding layer is provided on the inner surface of the body portion, and an insulating mechanism is provided on the inner side of the first metal shielding layer, which enables the one or more components to be electrically insulated from the first metal shielding layer; and a bottom plate, wherein one or more sound holes are provided in the central portion thereof for passing sound, and a second metal shielding layer is provided on the whole surface of the side of the bottom plate coming into contact with the protection frame. Since a metal shielding layer and an insulating mechanism are provided on the inner side the protection frame of the miniature microphone, the electromagnetic shielding effect is good, meanwhile, an inner short circuit can be prevented in the miniature microphone. Besides, the production costs are low and the manufacturing process is simple.
Abstract:
An integrated circuit processing system is provided including providing a substrate having an integrated circuit, forming an interconnect layer over the integrated circuit, applying a low-K dielectric layer over the interconnect layer, applying an ultra low-K dielectric layer over the low-K dielectric layer, forming an opening through the ultra low-K dielectric layer and the low-K dielectric layer to the interconnect layer, depositing an interconnect metal in the opening, and chemical-mechanical polishing the interconnect metal and the ultra low-K dielectric layer.