Abstract:
Switching interference is a primary artifact which affects the accuracy of arc detectors. To address switching interference, conventional arc detectors employ computationally intensive techniques which are often designed specifically for a target application. Thus, conventional arc detectors require a significant amount of hardware to accurately detect arc faults, which can increase costs of the power systems and prohibit wide deployment of arc detectors. With improved signal processing, a unique method for arc detection can accurately detect arc faults efficiently while tolerate switching interference from an inverter of the power system. Specifically, the method provides accurate but efficient arc detection by using a small Fast Fourier Transform with coherent sampling that is accomplished with a common clock generator in combination with signal conditioning. The overall system implementing the method is also programmable to suit a variety of target applications.
Abstract:
Apparatus and method for clock and data recovery are disclosed. A reset circuit counts clock cycles between edges of an input signal and resets a signal processing circuit that performs acquisition and tracking of a data stream when the clock cycle count is outside of a range. The signal processing circuit is further configured to perform acquisition and tracking according to a corrected data rate, which can be generated by data rate adjustment through a phase error correcting control loop and/or dithering between two data rates.
Abstract:
An integrated electronic component assembly can include an electrically-conductive structure comprising two or more electrically-conductive terminals accessible on an exterior of the integrated electronic component assembly, a first component attachment region for a first component within the integrated electronic component assembly, and a second component attachment region for a second component within the integrated electronic component assembly. The integrated electronic component assembly can include an electrically-conductive magnetically-permeable shield coupled to or defined by the electrically-conductive structure, the electrically-conductive magnetically-permeable shield located between the first and second component attachment regions, including a portion extending in a direction out of a plane defined by the first and second component attachment regions, to suppress magnetic coupling between the first and second components.
Abstract:
The present invention relates in one aspect to a DC linear voltage regulator circuit for generating a regulated DC output voltage based on a DC input voltage. The DC linear voltage regulator circuit comprises a DMOS pass transistor comprising drain, gate, source and bulk terminals wherein the drain terminal is connected to a regulator output which is configured to supply the regulated DC output voltage and the source terminal is connected to a regulator input for receipt of the DC input voltage. The DC linear voltage regulator circuit comprises a switchable leakage prevention circuit, connected to the bulk terminal of the DMOS pass transistor, and configured to automatically detect and interrupt a flow of leakage current from the regulator output to the bulk terminal.
Abstract:
A system, such as a system-on-chip, has a non-debug domain and a debug domain. The debug domain has a debug framework that enables a debugger driven, non-debug domain system reset. The system includes a reset control unit, and a debug trigger mechanism that includes a debug trigger interface (DTI) connected to the reset control unit. The DTI is configured to trigger the reset control unit to reset the non-debug domain. The DTI may further be configured to monitor a status of the non-debug domain system reset.
Abstract:
Apparatus and methods for scalable receivers are provided herein. In certain implementations, a scalable receiver system includes at least one analog-to-digital converter (ADC) that receives coded analog outputs from two or more receiver front ends. The receiver front ends system can process and code analog signals received from antennas using track and hold circuitry and various other circuitry such as filters and mixers.
Abstract:
Circuits and method for providing voltage reference circuits that include low drift over time and lower operating voltages are provided. Generally, it is desirable that a reference circuit provide an accurate and precise reference over time. The voltage reference circuits described can provide for good long term stability, operation at lower voltages than prior designs, consistent output voltage with reduced variability due to process changes and mismatches, low noise in the reference voltage, and other advantages.
Abstract:
In an example, there is disclosed a multi-stage Digital to Analog Convertor, including: a first stage having a first set of circuit components, a second stage having a second set of circuit components and a third stage having a third set of circuit components, the third stage providing a load within first and second individual switchable impedance paths; wherein the DAC is operable in each of a first mode, a second mode and a third mode of operation, wherein in a first mode the first stage is switchably coupled to the second stage independently of the third stage; in a second mode, the load is coupled and presented to a first part of the second stage of circuit components and in a third mode the load is coupled and presented to a second, different, part of the second stage of circuit components. A corresponding system and method is also disclosed.
Abstract:
A driver may provide a transition of a switch between an on state and an off state in two stages. In the first stage, the voltage slew rate of the voltage at an output terminal of the switch may be controlled. In the second stage, the current gradient of the switch may be controlled. The transition between the first stage and the second stage may be made based on the value of the voltage at the output terminal of the switch.
Abstract:
A circuit and method to filter a signal is provided. The circuit includes a notch filter circuit to receive an input signal and first and second tuning signals and to provide an output signal. The notch filter circuit has an input-output frequency response that includes a stopband region. The stopband region has a center frequency and has an attenuation level that is based at least on a tuning signal. The tunable filter circuit further includes a tuning circuit operable in at least two modes to generate the tuning signal. The at least two modes includes a tuning mode and a filtering mode. The tuning circuit generates the tuning signal such that the attenuation level of the stopband region is greater in the filtering mode than in the tuning mode.