SU482886A1 - Analog-discrete information conversion device - Google Patents

Description

one

The invention relates to a pulse technique, namely, to analog-discrete devices for transmitting information.

An analog-to-discrete information conversion device is known, comprising a level analyzer and a switch controlled by a synchro-generator,

The disadvantage of the known device is the presence of large quantization noise.

The goal of the inventive is to reduce quantization noise.

It is achieved that between the analyzer output yponneii and the switch inputs are introduced n parallel signal conversion circuits, each of which consists of a series-connected extender, the coding unit and LNIIII1 delay.

The drawing shows the block diagram of the described device.

An analog signal is fed to the input of an analyzer of 1 levels, which compares the signal levels with the set of reference levels specified for this analyzer. The comparison is made on a signal segment of duration t, and it is determined which maximum level of the specified reference levels was exceeded by the maximum level of the signal segment of duration t, and this information is transmitted to the input of the transfer switch.

The analog signal from the output of the Level 1 Analyzer is simultaneously fed to the input of n extension cords 2, 3, 4, 5 and 6 (in the drawing there are five extension cords).

The attenuation of extenders 2, 3, 4, 5 and 6 can be chosen according to any law. For example, extension 2 can pass the signal without changing the level. Extension 3 - reduce the signal level by half. Extension 4 - reduce the signal level by four times, extension cable 5 - reduce the signal level by eight times, extension cable 6 - reduce the signal level by sixteen times.

Each of the outputs of the extenders 2, 3, 4, 5 and 6 is connected to the corresponding input of the coding blocks 7, 8, 9, 10 and 11. The coding blocks transform the analog signal into digital information. Digital information from the outputs of the coding blocks 7, 8, 9, 10 and 1 goes to the corresponding inputs of delay lines 12, 13, 14, 15 and 16 with a delay time equal to, from the outputs of delay lines 12, 13, 14, 15 and 16 digital information enters the inputs of the switch 17. The switch is controlled by a code combination generated by the level analyzer 1 and pulses from the clock generator 18. The switch sends one of the signal elements in digital form to the communication channel with a level determined by

from the code combination issued by the analyzer: torus.

Subject invention

An analog-to-discrete information conversion device comprising a level analyzer and a switch controlled by a synchro-generator, characterized in that

quantization noise reduction, between the level analyzer's INPUT and the switch inputs are introduced n parallel conversion circuits, a signal, each of which consists of a serially connected extension cable, a coding block, a delay line.

Priority 05.10.70.