Engineers from the University of Brigham Yang (BYU) in Utah designed the most energy-efficient ultra-wideband analog-to-digital converter, which at a frequency of 10 GHz consumes only 21 MW. This is an order of magnitude or less than the modern counterparts offer. With such an ADC device with wireless communications, such as smartphones, will be able to significantly increase battery life.
«Many research teams around the world are concentrated on the ADC. It looks like a competition, who can build the fastest and most economical car in the world, said the head of the Developer Group Professor University Wood Chan (Wood Chiang). – It is very difficult to defeat everyone else in the world, but we managed to do it. “
The project financed by the Ministry of Science of Taiwan and the Consortium of Technological Companies took four years to the development of a chip and one year on testing. The researchers have entered the team from the National University of Taiwan and the University of California in Los Angeles.
ADP engineers were able to achieve such an outstanding result of the work of ADCs thanks to two main improvements in the diagram and structure of the converter. First, the design and placement of capacitors in the chains of the DAC, which are also included in the analog-to-digital converters, was made such as to maximize the parasitic containers of the circuit. Also, the capacitors were collected in groups, and each group served one single discharge (channel or bit).
The second improvement was the representation of such a circuitry, as an analog key with the tracking voltodnad (BootStrapped Switch) in the form of a two-channel route, where each path can be optimized independently. It raised the speed of work without complication of circuitry. Consumption practically did not grow, and the switching speed has increased significantly.
All together – reducing consumption by reducing the parasitic capacity of the circuit and increase the switching speed due to the multichanal key scheme – allowed to achieve impressive results. It will be interesting to know who of the manufacturers of smartphones or other wireless devices is the first to take this scheme engineering.