Title :
Current controlled multi-step CMOS video data converters
Author_Institution :
Norwegian Telecom Res., Kjeller, Norway
Abstract :
A method of connecting K identical parallel M bit converters to form a K·M bit converter is presented. By controlling the voltage drop over the resistor string with a current the linearity is made independent of offset voltage between the steps and high ONresistance in the switches. This connection gives DACs with linearity determined by the resistors and with a speed/power ratio of 15MHz/mW. An ADC based on the same idea has been developed for a PAL video application. This ADC uses two identical flash ADC blocks in the two-steps, making the principle suitable for monolithic integrated, hybrid and PCB solutions.
Keywords :
CMOS integrated circuits; digital-analogue conversion; power aware computing; K identical parallel M bit converters; current controlled multistep CMOS video data converters; offset voltage; resistor string; voltage drop control; Code standards; Decoding; Joining processes; Linearity; Parasitic capacitance; Resistors; Switches; Telecommunication control; Voltage control;
Conference_Titel :
Solid-State Circuits Conference, 1992. ESSCIRC '92. Eighteenth European
Conference_Location :
Copenhagen
Print_ISBN :
87-984232-0-7
DOI :
10.1109/ESSCIRC.1992.5468435
