Research labs Laboratories Sampling conversion laboratory

Sampling conversion laboratory

Sampling Conversion Laboratory

Sampling conversion laboratory was founded in 1968. The laboratory is engaged in research of the comparator type equivalent time converters. At present (2016) in the laboratory consists of 5 people, including 2 senior researchers, two scientific assistants and one engineer.

Comparator type converters historically appeared later than the gate-type converters and have several technical advantages. Instead of narrow strobe pulse, a voltage jump can be used as a strobe signal. This simplifies the structure of strobe generator. There’s no need for amplification of the analogue voltage for the digitising of the result of measurement because the measurement result in the output of comparator is obtained in the form of the binary information as a sequence of "ones" and "zeros". Comparator type converter at the expense of dynamic range allows to increase sensitivity of converter without increasing the number of strobe pulses. In gate-type converters sensitivity can be increased only by increasing the number of clock pulses (worsening performance). In comparator type converters it is possible to obtain a higher linearity, so they are used in quality control of test-signals. At the same time, applications of comparator type converters require multi-issue research. One of the main problems is:  how to achieve required sensitivity and dynamic range with the minimal number of clock pulses. There are other issues to be addressed.

The investigations to be carried out in the Laboratory occur in the following interrelated directions:

1. Design of signal transformation techniques and additional processing of transformed in time signals with the aim to improve the signal/noise ratio, reducing the required number of samples and to expand the dynamic range of convertible signals.

2. Investigations and improvement of the circuitry and design of the main unit of converter – clocked comparator – with the aim to improve the performance of the comparator – frequency bands, stability, lower dependence of parameters on external factors.

3. The design of the circuitry of equivalent time converters for experimental verification of theoretical and obtained through modelling results, the evaluation of the technical convenience of the methods and potential practical applications.

Possible application areas for equivalent time converter are equivalent time transformation, reflectometry and UWB radar (radar for road coverage, respiratory and cardiac radar, life detection behind opaque walls and beneath the ruins of buildings in the event of accidents, etc.).

Additionally, in the Laboratory studies are carried out on the image processing and recognition in order to develop fast and efficient methods for filtering and image recognition. The possible applications of research results are very widespread - practically all those technical and medical sectors, where the form of information of interest is an image.

Staff of the Laboratory in the fields of equivalent time conversion and image processing during the last 3 years (2013-2015) have published seven articles, some of which were produced in cooperation with other laboratories. During that time period, 4 patents, related to equivalent time conversion, and one patent, related to image processing, were received