Medical ultrasonic diagnostic instrument real-time logarithmic compression circuit establishment method based on FPGA

Provided is a medical ultrasonic diagnostic instrument real-time logarithmic compression circuit establishment method based on an FPGA. A data distribution module connected with a data input signal, a total logarithmic compression module connected with the output of the data distribution module, and a data integrating module connected with the output of the total logarithmic compression module are established on the FPGA, wherein the total logarithmic compression module is composed of logarithmic compression sub-modules with the number equal to that of N+1 output channels of the data distribution module, and N is the digit number of compression results output by the data integrating module. Through the method, one logarithmic compression result is output every time a clock rising edge comes, and the real-time performance of ultrasonic echo digital signals in the logarithmic compression treatment process is guaranteed. The dynamic changing range of input signals can be effectively compressed through logarithmic compression, small signals are enhanced, and the real-time treatment requirement is met. The space needed by a ROM is 28*16 bit, and occupied hardware resources can be effectively reduced.