Motorola Solutions, Inc.

Motorola Corporation

Zebra Technologies Corporation

Jeffrey B Wilhite

Paul H Gailus

Rostyslaw Zbotaniw

Robert E Stengel

Ronald H Chapman

Joseph A Charaska

Dale William Russell

Manuel P Gabato

Kevin J McCallum

Valik Solorzano Barboza

In some implementations, a query management system may receive an access notification associated with the data source. The query management system may analyze the data source to determine a query parameter that is associated with the data source. The query management system may determine a reliability score for the query parameter based on at least one of: source data of the data source, and other source data associated with one or more other data sources. The query management system may configure, based on the reliability score satisfying a reliability threshold, a communication interface with the data source. The query management system may integrate the data source for use with the virtual assistant in accordance with the reliability score, the query parameter, and the communication interface.

Onboarding a data source for access via a virtual assistant

An on-chip self testing digital-to-analog converter (DAC) is provided. The functionality of the DAC is measured using a combination of integral non-linearity (INL) and differential non-linearity (DNL). Parts may pass or be rejected based on the testing. When a DAC passes the testing, the process continues to the next DAC or quits if all the DACs have been tested.

Method and apparatus for self-testing a digital-to-analog converter (DAC) in an integrated circuit

Low noise phase quadrature signals are generated after receiving a clock signal and adjusting the clock signal in response to a feedback signal to generate a phase adjusted clock signal. The clock signal and the phase adjusted clock signal are exclusive-ored to generate a frequency doubled signal. An in-phase local oscillator signal and a quadrature local oscillator signal are generated from the frequency doubled signal such that the in-phase local oscillator and the quadrature local oscillator signal are out-of-phase with each other. In addition, a phase relationship between the in-phase local oscillator signal and the quadrature local oscillator signal are detected, and the feedback signal is generated based upon the phase relationship between the in-phase local oscillator signal and the quadrature local oscillator signal.

Broadband self adjusting quadrature signal generator and method thereof

A feedback loop with an adjustable closed loop frequency response. The feedback loop contains adjustable pole () and adjustable zero elements () for changing the pole and/or zero locations in the feedback loop's loop frequency response thereby changing the closed loop frequency response of the feedback loop. In one embodiment, the feedback loop is a Cartesian feedback loop suitable for use in a radio transmitter.

Feedback loop with adjustable bandwidth

A transmitter is provided with a local oscillator (LO) processing unit to maintain stability in the transmitter's feedback loop. The LO processing unit includes at least one delay locked loop (DLL) and a programmable divider to generate phase shifted LO signals for adjusting a loop phase of the feedback loop in the transmitter. The generated phase shifted LO signals are of both a coarse and fine phase shifted nature. The adjustability and control of the coarse and fine phase shifting of the LO signals maintains linearity in the transmitter feedback loop.

Method and apparatus for generating phase shifted local oscillator signals for a feedback loop on a transmitter

An apparatus and method produce a plurality of output signals (,) with fixed phase relationships therebetween. The apparatus (,) includes a first signal generator (,), a second signal generator (,), and a signal processor (,). The first signal generator produces a first input signal (,) at a first frequency. The second signal generator produces a second input signal (,) at a second frequency, wherein the second frequency is an integer multiple of the first frequency. The signal processor receives the first and second input signals and produces a plurality of output signals (,) having fixed phase relationships therebetween at the first frequency, wherein the fixed phase relationships are based on the integer multiple and wherein each of the output signals has a single, determinate phase relative to the phase of the first input signal.

Apparatus and method for producing a plurality of output signals with fixed phase relationships therebetween

An apparatus and method produce a plurality of output signals (917-921) with fixed phase relationships therebetween. The apparatus (900) includes a first signal generator (901), a second signal generator (903), and a signal processor (907). The first signal generator produces a first input signal (911) at a first frequency. The second signal generator produces a second input signal (915) at a second frequency, wherein the second frequency is an integer multiple of the first frequency. The signal processor receives the first and second input signals and produces a plurality of output signals (917-921) having fixed phase relationships therebetween at the first frequency, wherein the fixed phase relationships are based on the integer multiple and wherein each of the output signals has a single, determinate phase relative to the phase of the first input signal.

Apparatus and method for producing a plurality of output signals with

A linear amplifier (103) has a negative feedback loop that has a closed loop gain and a forward path gain. The negative feedback loop is closed, such that quick changes in the closed loop gain are prevented, thereby reducing splatter. When the negative feedback loop is opened, quick changes in the closed loop gain are also prevented, thereby reducing splatter.

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Barrington, IL, United States of America

Jeffrey B Wilhite