117results about How to "Compensation delay" patented technology

Apparatus for forming a lesion in body tissue includes a probe having an active region with an electrode for contacting tissue to be treated, and an inactive region including an insulative sleeve around a portion of the electrode. The temperature of the inactive region is monitored using a temperature sensor. A controller supplies radio frequency energy to the electrode and samples signals from the temperature sensor. By performing a calculation using the sampled signals and a predetermined inactive region threshold temperature, and by adjusting the supplied radio frequency power, the inactive region of the probe can be maintained at or below an inactive region maximum temperature whilst the controller continues to supply radio frequency energy to the electrode. The probe has a second temperature sensor, mounted at a distal end of the electrode, the controller being configured to reduce the supplied radio frequency power when the electrode temperature reaches a predetermined maximum electrode temperature.

Optical coherence tomography (OCT) probe and system designs are disclosed that minimize the effects of mechanical movement and strain to the probe to the OCT analysis. It also concerns optical designs that are robust against noise from the OCT laser source. Also integrated OCT system-probes are included that yield compact and robust electro-opto-mechanical systems along with polarization sensitive OCT systems.

A method and system for keeping endpoints such as speakers and displays synchronized via feedback based on the actual output of the endpoints. A source of audiovisual content transmits corresponding digital data to one or more endpoints, such as over a home network, where it may be buffered and/or decoded for playback. Microphones or the like sense actual (post-buffering/decoding) output from one or more endpoints and feed it back to a synchronization mechanism. The synchronization mechanism employs pattern matching or similar techniques to determine whether and how to adjust the timing of endpoints to synchronize their actual outputs. Synchronization may be accomplished by controllably delaying transmission and/or other processing, by controllably changing the rate of advancing in a buffer, and/or by jumping ahead in a buffer. The synchronization mechanism may adjust multiple endpoints, e.g., when limited buffer size limits the amount of adjustment a single device can provide.

The invention provides a computer-implemented method for determining a time delay for time delay compensation of a microphone signal from a microphone array in a beamformer arrangement. For a given time, an instantaneous estimate of a position of a wanted sound source and/or of a direction of arrival of a signal originating from the wanted sound source is determined. The computer system then determines whether the instantaneous estimate deviates from a preset estimate of a position of the wanted sound source and/or of a direction of arrival of a signal originating from the wanted sound source according to a predetermined criterion. The predetermined criterion comprises a check whether the instantaneous estimate deviates from the preset estimate by at least a predetermined deviation threshold. If the predetermined criterion is fulfilled, the instantaneous estimate for the given time is set by the computer system as the preset estimate, and the computer system determines the time delay for time delay compensation of the microphone signal based on the instantaneous estimate.

Systems and methods for performance improvements in digital switching amplifiers using simulation-based feedback. In one embodiment, a digital pulse width modulation (PWM) amplifier includes a signal processing plant configured to receive and process an input audio signal. The amplifier also includes a simulator configured to model processing of audio signals by the plant. The outputs of the plant and the simulator are provided to a subtractor, the output of which is then added to the input audio signal as feedback. The plant may consist of a modulator and power switch, a noise shaper, or any other type of plant. An analog-to-digital converter (ADC) may be provided to convert the output audio signal to a digital signal for input to the subtractor. Filtering may be implemented before or after the ADC, and a decimator may be placed after the ADC if it is an oversampling ADC.

Provided is a distributed Doherty power amplifier exhibiting high efficiency and linearity at a wide range of bandwidths, the distributed Doherty power amplifier including a first amplifier; a second amplifier, which is connected to the first amplifier in parallel; a first shifting unit, which is interconnected between the input of the first amplifier and the input of the second amplifier and inverses the phase of the input of the second amplifier; and a second shifting unit, which is interconnected between the output of the first amplifier and the output of the second amplifier and inverses the phase of the output of the second amplifier, wherein the first amplifier and the second amplifier are Doherty power amplifiers, and each of the Doherty power amplifiers includes a carrier amplifier and a peaking amplifier, which are connected in parallel.

A base station for compensating a fixed route delay between a base station and a mobile station of a CDMA mobile communication system and an operation method thereof are disclosed. This base station includes a clock signal generation unit for receiving a 10 MHz, TOD and 1 PPS signal from a GPS receiving unit and generating a 1st even second clock signal in synchronization with the 1 PPS and a 2nd even second clock signal which is obtained by delaying the 1st even second clock signal by a maximum bidirectional propagation delay time between a base station and a relay unit, a first signal processing unit for receiving the 1st even second clock signal from the clock signal generation unit and modulating a forward link channel from the base station to a mobile station in synchronization with the 1st even second clock signal, and a second signal processing unit for receiving the 2nd even second clock signal from the clock signal generation unit and demodulating a backward link channel from the mobile station to the base station in synchronization with the 2nd even second clock signal, for thereby compensating a decrease of a cell communication radius due to a fixed route delay factor on a communication route between a base station and a mobile station.

A semiconductor memory device operates in synchronization with a system clock, without using a synchronous circuit such as a DLL or a PLL. The semiconductor memory device includes a synchronous circuit for generating output signals phase aligned with the system clock, a synchronous circuit selection circuit that performs switching between a synchronous circuit selection mode and a synchronous circuit non-selection mode, and a reference edge specifying register that specifies an edge of an internal clock which serves as a reference for outputting read data in the synchronous circuit non-selection mode. In the synchronous circuit selection mode, the read data is output by adjusting a phase deviation of the internal clock with respect to the system clock, using the synchronous circuit. In the synchronous circuit non-selection mode, the read data is output in synchronization with the internal clock, without using the synchronous circuit. For a delay of the internal clock with respect to the system clock, the edge of the internal clock used as the reference is adjusted by the reference edge specifying register. Then, even if the synchronous circuit is not used, a large timing deviation does not thereby occur.

Methods and systems for automatically reporting delay incurred in a model is disclosed. The delay may be incurred in a part or in an entire portion of the model. Delay incurred in each component of the model is determined and reported to users before executing the model. The delay of each component of the model may be determined based on intrinsic information of the component. If the intrinsic information of the component does not provide information on the delay of the component, the component may be simulated to determine the delay of the components. The model may be automatically compensated for the delay. The delay is reported prior to the execution of the model, and compensated for without executing the model.

An apparatus for power demand distribution in a fuel cell vehicle includes: a battery management system calculating an allowable battery power that a battery can supply; a power demand distribution controller configured to derive a vehicle demand power including a drive motor demand power required by the drive motor, and determine a value corresponding to a vehicle demand power minus the allowable battery power being scaled down or the drive motor demand power, as a fuel cell demand output; and a fuel cell controller configured to drive the air compressor feeding the air to the fuel cell to enable a fuel cell to generate the fuel cell demand output calculated by the power demand distribution controller.