SU617831A1 - Code-to-complex shape voltage converter - Google Patents

Description

one

The invention relates to the field of digital-analog measurement technology and can be used in test and measurement systems for various purposes.

A known code-to-analog converter containing a receiving register, a set of keys, a source of reference voltage, and a resistive matrix 1. The device is a code converter into square voltage or current pulses whose duration is equal to the residence time of the input code on the receiving register. The main drawback of the converter is that it does not have any variable parameter. This causes great difficulties when it is necessary to obtain at the output of a pulse converter of complex shape.

Also known is a code converter into complex-shaped pulses, which contains a code-to-voltage converter, the input of which is connected to the input code bus, and the output is connected to the signal inputs of the main block of analog switches, whose outputs are connected to the output bus of the device 2 via a resistor matrix. However, to obtain a complex control circuit is required at the output of complex shaped pulses.

The purpose of the invention is to expand the functional capabilities of code-to-voltage converters. The goal is achieved by the fact that

The device is entered in series with a register, an additional key block, a counter, a time distributor, a lock register, an AND element and a block of lock keys, whose outputs are connected to the control inputs of the main block of analog keys, and the control inputs are connected to the lock register output, which input is connected with lock code, timed output

connected to the first input of the element And, the second input of which is connected to the bus clock pulses, and the third input - with the output of the counter and signal inputs of the additional key block, and the output of the element And

connected to the control input of the counter, and the inputs of the register and the counter are also connected to the panel of the code controlling the duration of the pulses. The drawing shows the scheme of the proposed Converter. It contains serially connected register 1, key block 2, counter 3, time distributor 4, key block 5, block analog key 6, resistor matrix

7, the lock register 8, the code converter 9 to voltage, the AND element 10, the bus 11 clock pulses L, the bus 12 of the M code, control, its duration "elementary pulses, and the bus 13 of the X code converted into voltage.

The code X, which is to be converted into voltage, goes to converter 9. At the output of converter 9, a voltage proportional to code X is formed. Simultaneously with the code, through the element 10, clock pulses begin to flow to counter 3. Counter 3 generates pulses K, overflows, which are fed to the temporary distributor 4. Through the keys 5, the distributor 4 alternately switches the analog switches 6, connected through the resistive matrix 7 to the output of the converter 9 to the actuators. If there are analog switches 6 in the resistive matrix 7, the output voltage UQ is converted into a pulse of complex shape consisting of "elementary pulses." The key block 5 skips the signals of the time distributor 4 in the case of writing to the corresponding register bit register 8 of the logical unit.

Element I 10 for three inputs serves to stop the supply of clock pulses to the input of counter 3 at the moment of reception of the code from register 1 on the pulse K. overflow, as well as after the formation of "elementary pulses on the signal from the time distributor 4.

Thus, the converter allows you to convert the code into pulses of complex shape, which can be changed during converter operation by changing the code M, controlling, its duration of "elementary pulses, and code Z for blocking the operation of keys 5.

Claims (2)

1. USSR author's certificate number 162368, cl. H 03 K 13/02, 1963. 2. Klebansky, R. B. Code Converters to Implementation. “Energy, M., 1973, p. 18-19.