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Ottawa, Canada

Microsemi Corporation is a manufacturer of defense, security, aerospace, enterprise, communications, medical, alternative energy, and industrial products for power-related applications. Major products offered by Microsemi are analog devices, mixed-signal and RF integrated circuits, customizable system-on-chips , FPGAs, and complete subsystems. It has been based in Aliso Viejo, California since 2011, when it relocated its headquarters from Irvine, California. Microsemi has plants in California, Arizona, Massachusetts, Texas, Florida, Ireland, China and Canada. Wikipedia.


An apparatus includes a metal frame, a switching power circuit, and at least one semiconductor die implementing a communication interface. The metal frame includes a plurality of external pads, and a plurality of base pads coupled to selected external pads. The switching power circuit is mounted to selected base pads and includes an input terminal, an output terminal, an energy storage device mounted to a first subset of the base pads and coupled to the output terminal, and a switching element mounted to a second subset of the base pads and coupled to the input terminal and the energy storage element. The at least one semiconductor die provides a control signal to the switching device to control an output voltage present at the output terminal.


Patent
Zarlink | Date: 2011-03-15

Zoom motor noise in a camera audio recording is reduced by detecting activity of the zoom motor, transforming a audio signal into the frequency domain during zoom motor activity, and scaling the frequency domain signal during zoom motor activity in each of a series of frequency bins by a scaling factor derived from a pre-stored zoom motor noise spectrum to produce a processed audio signal in the frequency domain. The processed audio signal is then transformed back to the time domain.


A method of recovering timing information in a packet network, involves detecting quiet periods in the packet network when network packet delay variation (PDV) is low. A frequency prediction unit is trained during the quiet periods to learn output clock variations of a timing recovery unit to permit the frequency prediction unit to predict frequency update values for a local oscillator during non quiet periods taking into account the historical output clock variations during quiet periods. The output of the frequency prediction unit is used as the active frequency update values during non quiet periods.


A wireless receiver for receiving a signal with a characteristic pattern includes a predictor for predicting the presence of a non-zero value of the characteristic pattern. A tracker tracks a noise component in the received signal between predicted non-zero values. The resulting noise component is subtracted from the received signal to output a processed signal, which is then decoded by a pattern discriminator and demodulator. The wireless receiver is less sensitive to noise and interference.


To perform timing synchronization in an asynchronous packet network, remote timestamps representative of a transmitter clock at a transmitter are received over a packet network. These are compared with local timestamps representative of the timing of a local oscillator at the receiver to produce an estimate of the offset between the transmitter clock and the local oscillator at the receiver. This estimate is then used to generate update values for a digital controlled oscillator producing the output clock at the receiver. The system operates in a feedforward configuration wherein the local oscillator at the receiver serves as one input to the offset estimator.

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