Title :
A cascaded continuous-time ΣΔ modulator with 80 dB dynamic range
Author :
Ortmanns, Maurits ; Kuderer, Markus ; Manoli, Yiannos ; Gerfers, Friedel
Author_Institution :
Freiburg Univ., Germany
Abstract :
This paper presents the implementation of the first 2-1-1, cascaded continuous-time (CT) sigma-delta (ΣΔ) modulator. The successful realization is shown by measurements and a dynamic range of 80 dB is achieved. Special attenuation has been paid to the gain-error mismatch and a previously reported digital correction. Therefore, the modulator has been implemented on a circuit board to be able to test this nonideal behavior and to compensate for it. It could be shown, that cascaded CT ΣΔ modulators have the potential to be integrated as high-speed, high-resolution circuits.
Keywords :
cascade networks; circuit testing; continuous time systems; error correction; sigma-delta modulation; attenuation; cascaded circuits; circuit behavior compensation; circuit behavior testing; circuit board; circuit implementation; circuit integration; circuit realization; continuous-time ΣΔ modulator; digital correction; gain-error mismatch; high-resolution circuits; high-speed circuits; modulator implementation; nonideal circuit behavior; Delta modulation; Dynamic range;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1328217
