Title :
CMOS fully-differential bandpass ΣΔ modulator using switched-current circuits
Author :
de la Rosa, J.M. ; Verdú, B. Pérez ; Medeiro, F. ; Vázquez, A. Rodríguez
Author_Institution :
Centro Nacional de Microelectronica, Saville, Spain
fDate :
2/1/1996 12:00:00 AM
Abstract :
The authors present a fourth-order bandpass ΣΔ switched-current modulator IC in 0.8 μm CMOS single-poly technology. It is the first reported integrated circuit realisation of a bandpass ΣΔ modulator using switched-current circuits. Its architecture is obtained by applying a lowpass to bandpass transformation (z1→-z2) to a second-order lowpass modulator. It has been realised using fully-differential circuitry with common-mode feedback. Measurements show 8 bit dynamic range up to 5 MHz clock frequency
Keywords :
CMOS integrated circuits; circuit feedback; modulators; sigma-delta modulation; switched current circuits; 0.8 micron; 5 MHz; CMOS single-poly technology; SI modulator IC; Si; bandpass ΣΔ modulator; bandpass sigma-delta modulator; common-mode feedback; fully-differential circuitry; integrated circuit realisation; lowpass to bandpass transformation; switched-current circuits;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19960164
