Title :
Low-cost CMOS algorithmic digital-analogue convertor for high-frequency applications
Author :
Franca, J. ; Vital, J.
Author_Institution :
Dept. of Electr. Eng. & Comput., Inst. Superior Tecnico, Lisbon, Portugal
Abstract :
A novel, low-cost digital-analog convertor (DAC) circuit suitable for high-frequency applications has been designed and integrated using a 2.5-μm CMOS technology. The convertor uses a purely passive parasitic-compensated switched-capacitor circuit to implement a conversion algorithm consisting of a mere charge division between equal-valued capacitors. The output voltage signal directly related to the equivalent charge of the converted digital word is produced by means of a charge-to-voltage conversion circuit which is designed to become insensitive to both the offset and finite DC gain of the amplifier. The analog active area of the integrated DAC is 0.25 mm2
Keywords :
CMOS integrated circuits; digital-analogue conversion; switched capacitor networks; 2.5 micron; CMOS technology; algorithmic digital-analogue convertor; charge division; charge-to-voltage conversion circuit; equal-valued capacitors; high-frequency applications; integrated DAC; low cost DAC; passive parasitic-compensated; switched-capacitor circuit; Application software; Application specific integrated circuits; CMOS technology; Consumer electronics; Converters; Integrated circuit technology; Signal design; Switched capacitor circuits; Switching circuits; Voltage;
Conference_Titel :
Custom Integrated Circuits Conference, 1990., Proceedings of the IEEE 1990
Conference_Location :
Boston, MA
DOI :
10.1109/CICC.1990.124676
