The design in a standard 0.13 μm CMOS technology of a 1.2 V baseband block (DAC+Filter), intended for wireless applications (UMTS, WLANs), is presented. A transimpedance stage is placed between the two functional blocks to improve the static and dynamic linearity performance of the current steering DAC with respect to a solution in which the DAC outputs are directly connected to the following reconstruction filter. Transistor level simulations have been used to evaluate the DAC DNL-INL and the dynamic linearity performance (OIP3) at the filter output. A comparison with the simulated performance of an implemented block which does not use the DAC output transimpedance stage confirms the effectiveness of the proposed solution. © 2005 IEEE.
Ghittori, N., Vigna, A., Malcovati, P., Baschirotto, A., D'Amico, S. (2005). A low-distortion 1.2 v DAC+filter for transmitters in wireless applications. In Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on (pp.776-779). 345 E 47TH ST, NEW YORK, NY 10017 USA : IEEE [10.1109/ISCAS.2005.1464703].
A low-distortion 1.2 v DAC+filter for transmitters in wireless applications
BASCHIROTTO, ANDREA;
2005
Abstract
The design in a standard 0.13 μm CMOS technology of a 1.2 V baseband block (DAC+Filter), intended for wireless applications (UMTS, WLANs), is presented. A transimpedance stage is placed between the two functional blocks to improve the static and dynamic linearity performance of the current steering DAC with respect to a solution in which the DAC outputs are directly connected to the following reconstruction filter. Transistor level simulations have been used to evaluate the DAC DNL-INL and the dynamic linearity performance (OIP3) at the filter output. A comparison with the simulated performance of an implemented block which does not use the DAC output transimpedance stage confirms the effectiveness of the proposed solution. © 2005 IEEE.
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