Configurable time-interleaved analog-to-digital converter

Abstract

A time-interleaved analog-to-digital converter for conversion of L analog input signals to L corresponding digital output signals is disclosed. The time-interleaved analog-to-digital converter comprises an array of N (N being larger than L) constituent analog-to-digital converters each having an analog input and a digital output and each adapted to digitize an analog input sample. The time-interleaved analog-to-digital converter also comprises a controller adapted to (for each of the L analog input signals indexed by i=1, 2,..., L) select a number Ni of constituent analog-to-digital converters from the array of N constituent analog-to-digital converters (wherein Ni is larger than or equal to 1 and formula (I)), and cause each sample of the analog input signal to be digitized in a respective one of the selected Ni constituent analog-to-digital converters. The time-interleaved analog-to-digital converter also comprises a multiplexer adapted to (for each of the L analog input signals) multiplex the digitized samples of each of the selected Ni constituent analog-to-digital converters to produce the digital output signal corresponding to the analog input signal.

Description

technical field [0001] The present invention generally relates to the field of analog-to-digital converters, and more particularly, the present invention relates to a dynamically configurable time-interleaved analog-to-digital converter. Background technique [0002] Electronic devices, such as televisions and other audio / video equipment, are typically implemented using digital rather than analog technology. Typically, the more advanced digital technology becomes, the more laborious the task of converting an analog signal to a digital signal suitable for digital technology implementation. [0003] Conceptually, an analog-to-digital converter (also denoted as ADC or A / D converter) and its basic functions (sample and hold, quantization) are very well known in the art, therefore, will not be elaborated here . [0004] For high sampling frequencies, it may be necessary or at least advantageous to employ an ADC structure comprising several component ADC:s to be able to accommod...

AI Technical Summary

Problems solved by technology

[0007] However, a solution with separate ADCs for each signal may not be suitable in all cases

For example, it may be inflexible and / or inefficient to design each time-interleaved ADC for a specific type of signal, rate, and / or resolution

For example, a structure designed for one audio channel and three video channels may not be suitable for four audio channels and vice versa

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