Title :
Adaptive digital correction for dual quantization Σ-Δ modulators
Author :
Kiaei, S. ; Abdennadher, S. ; Temes, G.C. ; Yang, Y.
Author_Institution :
Electr. & Comput. Eng. Dept., Oregon State Univ., Corvallis, OR, USA
Abstract :
An adaptive algorithm is proposed to enhance the performance of first- and second-order Leslie-Singh and MASH modulators in the presence of nonideal analog components. The resulting modulator has a significantly higher signal-to-noise ratio. A simplified digital adaptive correction scheme is presented which requires no multiplication. In a typical example, the SNR improvement is about 30-40 dB for the MASH modulator and 20 dB for the Leslie-Singh modulators. A simplified algorithm which requires no multiplication is presented.
Keywords :
adaptive signal processing; error correction; sigma-delta modulation; ADC; Leslie-Singh modulators; MASH modulators; SNR improvement; adaptive algorithm; digital adaptive correction scheme; dual quantization Σ-Δ modulators; nonideal analog components; sigma-delta modulators; signal-to-noise ratio; Capacitors; Degradation; Delta modulation; Digital modulation; Helium; Multi-stage noise shaping; Noise cancellation; Operational amplifiers; Quantization; Transfer functions;
Conference_Titel :
Circuits and Systems, 1993., ISCAS '93, 1993 IEEE International Symposium on
Print_ISBN :
0-7803-1281-3
DOI :
10.1109/ISCAS.1993.393950
