Title :
Reference refreshing cyclic analog-to-digital and digital-to-analog converters
Author :
Shih, Cheng-Chung ; Gray, Paul R.
fDate :
8/1/1986 12:00:00 AM
Abstract :
A method of cyclic analog-to-digital (A/D) and digital-to-analog (D/A) conversion using switched-capacitor techniques is described. By periodically modifying the reference voltage to compensate for the nonideal signal-transfer-loop gain, it is possible in principle to build A/D and D/A converters whose linearity is independent of component ratios and that occupy only a small die area. These converters require two moderate-gain MOS operational amplifiers, one comparator, and a few capacitors. A test chip for A/D conversion was built and evaluated. The test data show that the A/D performs as a monotonic 13-bit converter with maximum 1-LSB differential and 2-LSB integral nonlinearity.
Keywords :
Analogue-digital conversion; Digital-analogue conversion; Field effect integrated circuits; Switched capacitor networks; analogue-digital conversion; digital-analogue conversion; field effect integrated circuits; switched capacitor networks; Analog-digital conversion; Circuit testing; Digital-analog conversion; Linearity; MOS capacitors; Performance evaluation; Resistors; Switched capacitor circuits; Switching converters; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1986.1052570