Series in Microelectronics
edited by
Wolfgang Fichtner
Qiuting Huang
Heinz Jäckel
Hans Melchior
George S. Moschytz
Gerhard Tröster
Pier Andrea Francese
D / A Converters in CMOS
Technology.
2006; 248 pages. € 64,00. ISBN 3-86628-055-6
This dissertation presents specific studies on the design of D/A
converters finalized towards the implementation of two different design
examples in 0.18μm CMOS technology.
Calibration is used truly in background in the first design example to
overcome the limited accuracy of the current sources in a current-steering D/A
converter. The converter achieves a static linearity of 14bits and thanks to a
return-to-zero pulse format is also capable of delivering spectrally pure
signals at high frequency.
The second design example presents an innovative architecture that do
not rely on stringent component matching to reconstruct linearly an oversampled
signal from a ∑∆ (sigma-delta) modulator. A 16 times oversampled
signal from a 4th-order multi-bit cascaded ∑∆ (sigma-delta) digital
modulator is reconstructed with a filter composed by a semidigital/digital
transversal filter and a recursive filter in switched-capacitor (SC) technique.
With a SNR of 78 dB, a SFDR ranging from 73 dB to 80 dB within a 1.104 MHz
signal band and a MTPR greater than 70 dB at 15 dB PAR the proposed system is
suitable for broadband applications.
Keywords: data converters,
D/A converters, CMOS, analog circuits, jitter
Direkt bestellen bei / to order directly from: Hartung.Gorre@t-online.de