Publication

A Background Calibration Method for DAC Mismatch Correction in Multibit Sigma-Delta Modulators

Steve Tanner
2012
Conference Papers

Abstract

A topology for the calibration of DAC errors in multi-bit sigma delta modulators is presented. The proposed technique enables the calibration to proceed in the background. In this technique, two DACs are used in a time-interleaved fashion. One DAC is calibrated at a time while the other is connected to the modulator. The technique is demonstrated by a design in UMC 0.18 µm CMOS technology which shows a very competitive figure of merit of 78fJ/Conv-Step. The extensive simulation results are presented to validate the results.

Official source

https://infoscience.epfl.ch/entities/publication/9d33f973-0ee8-4a4d-a927-4be544f7fed4

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Steve Tanner
2012
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9d33f973-0ee8-4a4d-a927-4be544f7fed4

About this result

Related concepts (7)

Digital-to-analog converter

In electronics, a digital-to-analog converter (DAC, D/A, D2A, or D-to-A) is a system that converts a digital signal into an analog signal. An analog-to-digital converter (ADC) performs the reverse function. There are several DAC architectures; the suitability of a DAC for a particular application is determined by figures of merit including: resolution, maximum sampling frequency and others. Digital-to-analog conversion can degrade a signal, so a DAC should be specified that has insignificant errors in terms of the application.

Analog-to-digital converter

In electronics, an analog-to-digital converter (ADC, A/D, or A-to-D) is a system that converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a digital signal. An ADC may also provide an isolated measurement such as an electronic device that converts an analog input voltage or current to a digital number representing the magnitude of the voltage or current. Typically the digital output is a two's complement binary number that is proportional to the input, but there are other possibilities.

Modulation

In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a separate signal called the modulation signal that typically contains information to be transmitted. For example, the modulation signal might be an audio signal representing sound from a microphone, a video signal representing moving images from a video camera, or a digital signal representing a sequence of binary digits, a bitstream from a computer.