Spectral shaping of DAC nonlinearity errors through modulation of expected errors
نویسندگان
چکیده
Traditionally, delta-sigma modulation has been used for shaping of quantization noise. We present a modified version of delta-sigma modulation which also takes into account unwanted nonlinearities by feeding back not only the quantization error, but also the expected physical error. Behavioral-level simulations of a 5th-order structure showing an improvement of up to 4 effective bits are included.
منابع مشابه
Joint Shaping of Quantization and Hardware-Mismatch Errors in a Multibit Delta-Sigma DAC
A recent sigma-delta modulator architecture incorporates spectral shaping of hardware-mismatch errors through redundancy introduced by embedding the input/output subspace in a higher-dimensional space for loop operation. Here basic design issues for the key vector quantizer and matriximpulse-response loop filter are explored. A simple design example and simulation illustrate.
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