Csr Technology Inc.

Xw LLC

Ryan Lobo

Oren E Eliezer

Timothy M Magnusen

Mark Appel

Cost-effective structures and methods that allow an integrated digital-to-analog converter (DAC) to simultaneously achieve wide dynamic ranges and bandwidths through the use of built-in measurement and compensation mechanisms that are primarily digital. The measurements of the DAC's distortions are made with a relatively simple analog-to-digital converter (ADC) that is not designed to accommodate the combination of the bandwidth and the resolution offered by the DAC, but is nonetheless sufficient in determining the characteristics of the DAC's impairments during a calibration procedure. This information is then used in a feed-forward compensation system during the DAC's normal operation to estimate and cancel the distortions in its output signal that could result from the various impairments.

Self-compensating digital-to-analog converter and methods of calibration and operation thereof

Systems and methods which provide DC current path circuitry, such as for providing a DC bias, in association with a filter circuit such that parasitic attributes of the DC current path circuitry combines with the filter component attributes are shown. According to embodiments, the parasitic attributes of the DC current path circuitry components are added into the associated filter circuit network design. A parasitic capacitance of the DC current path circuitry may, for example, be aggregated with a capacitor of the filter circuit to eliminate or mitigate the effect of the presence of the DC current path circuitry on the associated filter frequency response. Embodiments implement an active inductor configuration for providing a DC current path in association with a filter circuit. An active inductor of embodiments is provided using a transistor, appropriately biased to actively exhibit low impedance at DC and high impedance at RF frequencies.

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Richardson, TX, United States of America

Ryan Lobo