Analog Devices Global

Analog Devices,inc.

Michael Hennessy

Christopher Peter Hurrell

William Hunt

Thomas J Conway

Patrick J Meehan

Donal G O'Sullivan

Mark T Kelly

Colin Gerard Lyden

Claire Croke

Miguel Usach Merino

Anthony Evan O'Shaughnessy

A device having a sample-rate converter that may be programmed to generate samples at different rates is synchronized to an external synchronization pulse by temporarily changing the sample rate to a temporary sample rate and then changing the sample rate back to the original sample rate. Synchronization in a reduced amount of time is achieved by determining the interval between the synchronization pulse and one of the output samples and determining a processing time of the device for generating the output samples at a new rate. The system calculates a temporary sample rate based on these calculations that tends to reduce an amount of time to achieve synchronization.

Resynchronization of sample rate converters

A signal processing apparatus that includes a circuit in which a signal processing function is performed during a first time period, the signal processing apparatus including or being associated with a switch or a filter in a power supply to the signal processing apparatus so as to disconnect the signal processing apparatus from the power supply or to filter the power supply during a second time period that is coincident with at least part of the first time period.

Method of improving noise immunity in a signal processing apparatus, and a signal processing apparatus having improved noise immunity

An analog to digital converter is provided comprising an array of capacitors for sampling an input, each capacitor having at least one associated switch for controllably connecting a terminal of the capacitor to a first reference voltage or to a second reference voltage; and a sequence generator for generating a sequence of bits, wherein during sampling of the input onto the array of capacitors an output of the sequence generator is supplied to the switches of a first group of capacitors to control whether a given capacitor within the first group is connected by its associated switch to the first reference voltage or to the second reference voltage.

Analog to digital converter with dither

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Limerick, Ireland

Michael Hennessy