Analog Devices International Unlimited Company

Analog Devices Global

Mayur Anvekar

Robert W Adams

Roberto Sergio Matteo Maurino

Venkata Aruna Srikanth Nittala

Naiqian Ren

David Lamb

A variable output data rate converter circuit preferably meets performance requirements while keeping the circuit complexity low. In some embodiments, the converter circuit may include an oversampling sigma delta modulator circuit to quantize an analog input signal at an oversampled rate, and output an sigma delta modulated signal, a transposed polynomial decimator circuit to decimate the sigma delta modulated signal, and output a first decimated signal, and an integer decimator circuit to decimate the first decimated signal by an integer factor and output a second decimated signal having a desired output data rate. The transposed polynomial decimator circuit has a transposed polynomial filter circuit and a digital phase locked loop circuit, which tracks a ratio between a sampling rate of the first decimated signal and the oversampled rate, and outputs an intersample position parameter to the transposed polynomial filter circuit.

Circuits, systems, and methods for providing asynchronous sample rate conversion for an oversampling sigma delta analog to digital converter

Techniques for synchronization between multiple sampling circuits using a single pin interface to control an output data rate are described. The frequency or rate of a signal on this pin can be automatically determined and used to accomplish the required output data rate. Also described are techniques for using a single pin interface that can allow a sampling device to operate either in a master mode that can generate data strobes, or in a slave mode that can receive a convert start signal. Also described are techniques for controlling bandwidth and throughput for individual channels in a multi-channel device using a single pin interface. For example, using various techniques of this disclosure, integer multiple rate control for other channels can be provided thereby providing varying ODR for different channels, which can also control the bandwidth of interest.

Circuits, systems, and methods for synchronization of sampling and sample rate setting

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Bengaluru, India

Mayur Anvekar