34 results about "Nominal level" patented technology

A method and apparatus for synchronizing streaming media with multiple output devices. One or more media servers serve media streams to one or more output devices (i.e., players). For playback synchronization, one output device is the “master”, whereas the remaining output devices are “slaves”. More data is requested from the media server by the “master” device to maintain a nominal buffer fill level over time. The “slave” devices receive streamed data from the media server at the rate determined by the master device's data requests, and the average rate of data flow over the streaming network is thus controlled by the frequency of the single “master” device's crystal. “Slave” devices make playback rate corrections to maintain respective buffer fill levels within upper and lower threshold levels. For slow networks, each media data packet timestamp is calculated from the time the master's buffer reaches nominal level.

A method for operating a commissioned e-commerce service provider provides services to businesses on a computerized network such as the Internet in exchange for a small commission on the commercial transactions generated using those services. Unlike most ISPs that provide services to individuals and businesses, the e-commerce service provider preferably provides Internet services for businesses operating web sites based on the amount of service utilized by the individual or business. Instead of paying a monthly fee for the Internet services required to host a web site or operate and e-commerce site, the business contracts with the e-commerce service provider to provide these services based on usage of these services. Preferably, the usage rate is tiered in accordance with the amount of traffic at the site to provide a nominal level of service at a lower rate, yet allow for an exceptional volume of traffic to be accommodated by the site at a higher rate without having the site fail or the service become overwhelmed.

A power protection device protects electronic equipment from AC supply system disturbances. An electronically controlled relay circuit passes power to connected equipment if the electrical supply system, to which the equipment is connected, is properly wired for continuity and correct polarity of line, neutral, and ground conductors, and the line voltage is within twenty-five percent of nominal levels. Thermal cut-offs are used as a back-up to the over-voltage protection provided by the electronically controlled relay circuit. These thermal cut-offs are connected in a way that when either or both trip, the relay of the electronically controlled relay circuit is de-energized and power is disconnected to the device output stage and connected equipment.

A method, operated by a Software Defined Networking (SDN) controller associated with an Autonomous System (AS) with one or more peering points, each peering point with an associated router communicatively coupled to the SDN controller, the method for detecting and defending against Distributed Denial of Service (DDoS) attacks, and the method includes receiving data from the one or more peering points; detecting malicious traffic at the one or more peering points; determining a peer quality measurement for the one or more peering points; and communicating the peer quality measurement and other data associated with the malicious traffic to one or more other SDN controllers, associated with Autonomous Systems connected through the one or more peering points, to facilitate convergence of the peer quality measurement back to a nominal level.

An adjustable-delay filter performs wave shaping to emulate pre-emphasis or de-emphasis of transmission-line signals. The adjustable-delay filter uses analog components and does not need a clock. The receiver does not have to recover a bit-clock from the data stream, eliminating a clock recovery circuit. An input buffer receives the input signal and drives current to a summer and to an adjustable delay. The adjustable delay inverts and delays the current and drives a delayed, inverted current to the summer. The summer combines the delayed, inverted current and the current from the input buffer to generate an output signal. The delay time of the adjustable delay can be programmed by a user and is less than the bit period. After a signal transition, the output signal initially spikes higher, then falls back to a nominal level after the delay time has expired. The initial signal spike emulates de-emphasis or pre-emphasis.

A method and system are disclosed for detecting turn-to-turn and phase-to-phase winding short circuits in an electric motor. The motor is tested at a standstill condition by injecting a current signal into the virtual d-axis of the motor while controlling q-axis current to zero. Steady state feedback current from the motor is measured, and current harmonics are calculated using FFT or peak-to-peak techniques. It is determined that a short circuit is present in the winding if feedback current harmonics higher than a nominal level are detected, where the increased feedback current is an indication that winding inductance has decreased due to a short circuit. Testing at standstill using a small current advantageously prevents the possibility of damaging the motor and avoids inductance variation due to changing rotor position.

Procedures to prevent the disconnection of a park of electricity generators from a network in the event of a voltage sag, through which, upon detection of the sag, the voltage travelling to the network is controlled in proportion to the magnitude of the sag; the active power produced by the park, rather than sent to the network, is thus diverted into to storage and/or energy dissipation equipment, keeping the park voltage at a nominal level.

The invention also includes a device for carrying out procedures integrating a bypass, transformer, static inverter, static converter, capacitance and dissipation resistance unit, voltage sag detection circuit and control circuit.

A quality level determining the extent to which each image file is compressed is automatically computed for each image file in a set to ensure that the total size of the compressed image files does not exceed a predefined limit. The compressed size of each image file is initially determined when compressed at a predefined minimum acceptable level and at a nominal level. The relative complexity of the image files is determined based upon their high frequency energy content. As a function of the image file complexity, and starting with the compressed sizes initially determined, the appropriate quality level is determined for compressing each of the image files in an iterative process that ensures the total size of the compressed image files does not exceed the predefined limit, while retaining acceptable quality. Thus, a set of image files can be compressed optimally to fit within a limited storage.

Featured is igniter control circuitry that reduces the line voltage to the igniter and which maintains the igniter voltage relatively stable. More particularly, there is featured, a thyristor-based phase control circuit that reduces the RMS voltage being applied to an igniter when it is connected to the AC line or line voltage. The circuitry also is configured so that it opposes changes in line voltage such that the igniter voltage remains relatively stable when the line voltage increases or decreases relative to its nominal level. Such control circuitry includes a dual diac configuration, a relation oscillator configuration and one embodying both dual diac and relation oscillator configurations.

The invention relates to a device for transmitting radiofrequency signals using a power amplifier. The power amplifier is connected to a power regulation loop for regulating its gain in such a manner as to bring the output power level to a desired nominal level. The regulation loop acts on the bias voltage as a function of the output from the power amplifier. According to the invention, the device further comprises adjustment means such as an integrating RC circuit for supplying an additional voltage to the regulation loop in such a manner that the input signal to the loop is more responsive and less dependent on the active components of the power amplifier. The invention is particularly applicable in the field of mobile transmission.