[Counting-type analog quantity and development of mutli-channel telemetering computer system for dynamic information about human vascular wall].

Counting-type analog quantity (CAQ), a new conception, is introduced in this article. CAQ possesses some features of analog quantity and digital quantity, that is to say, it has double features. By analysis, two kinds of CAQ are found: one is width-modulated countable pulse series, the other is frequency-modulated countable pulse series. Furthermore, the method of generating CAQ is described and its double feature is also proved. It is very convenient to realize single-channel or multi-channel analog-to-digital (A/D) conversion by using CAQ without utilizing present integrated A/D conversion chip. In this paper, for proving its feasibility, multi-channel telemetering computer system for dynamic information about human vascular wall,a typical example of using CAQ in medicine, is expatiated. The typical example clearly indicates: not only the method for application of CAQ is simple and viable, but also the application of CAQ is very wide.