SU1695507A1 - Converter of code to time interval - Google Patents

Abstract

The invention relates to automation and computing and can be used in information conversion and encoding devices. The purpose of the invention is to improve accuracy. The converter contains a register, a pulse counter, two delay elements, a waiting pulse generator, a trigger, a code comparison unit, a start bus, an input code bus, and an output bus. The accuracy of the conversion is increased by reducing the timing error of the start of the time interval. 1 silt

Description

chs

Yo

- The invention relates to automation and computing and can be used in information conversion and encoding devices.

The purpose of the invention is to improve accuracy.

The drawing shows a structural electrical converter circuit.

Converter code - time interval contains register 1, counter 2 im-. pulses, delay elements 3 and 4, standby pulse generator 5, trigger 6, block 7 of code comparison, start bus 8, input code bus 9 and output bus 10.

The Converter operates as follows.

Initially, an external device, from the output of which the number to be converted arrives and which is not shown in the drawing (for example, from the microprocessor interface), receives a short-term pulse through bus 8 that goes to the reset inputs of register 1 and counter 2 and zeroes them. In addition, this trigger pulse is applied to trigger input 6 and also resets it to zero.

The same pulse arrives at the input of the delay element 3, from the output of which the pulse is removed, which is fed to the synchronization input of register 1 and the number N in the digital binary code is written to it via its buses 9 from an external device.

A pulse from the output of the delay element 3 is fed to the input of the delay element 4, from the output of which a pulse is removed, which is supplied to the inputs of the waiting generator 5 and trigger 6. This pulse triggers the generator 5 and flips the trigger to one. At the output of the generator 5, pulses are generated.

about

8 5

frequency, and at the output of the trigger 6 (at the output bus 10) - a potential signal corresponding to the time interval.

The pulses from the output of the generator 5 are fed to the counting input of the counter 2 and its contents increase with time. At the moment of time when the contents of counter 2 becomes equal to the contents of register 1, a short pulse is removed from the output of comparison block 7, which is fed to the input of generator 5, disrupting its generation, and also to the input of trigger 6, transferring it to the opposite state, t. e. dropping it to zero. From the output of trigger 6, a potential signal is thus removed, which is a rectangular pulse whose duration is proportional to the code being converted.

Claims (1)

Invention A code converter is a time interval containing a register whose information inputs are buses. input code, and the outputs, respectively, are connected to the first inputs of the block. No matching codes, the second inputs of which are connected to the corresponding outputs of the counter pulses, and the output is connected to the first trigger input, the second input of which is a trigger bus, characterized in that, in order to improve accuracy, the first and second delay elements and the waiting pulse generator, the first input of which is combined with the first trigger input, are inserted into it, and the output is connected to a counting input of a pulse counter, the reset input of which is combined with the register reset input and the input of the first delay element and is a trigger bus, with the output of the first delay element connected to the register synchronization input and the second delay element, the output which is connected to the second input of the waiting pulse generator and the third input of the trigger, the output of which is the output bus.