SU1672437A1 - Voltages level converter - Google Patents

Abstract

The invention relates to computing and can be used in communication channels of a permanent storage device operating with TTL level signals, with equipment operating with signals of another level, such as CMDP. The aim of the invention is to simplify the device. This goal is achieved due to the fact that the device for converting voltage levels contains a switching element with appropriate connections, which eliminates the need for the use of voltage level switches. 2 Il.

Description

The invention relates to computing and can be used, for example, in communication channels of a permanent memory device operating with TTL level signals with equipment operating with signals of another level, for example, CMDP

The object of the invention is to simplify the device.

Fig 1 shows a diagram of the device, Fig 2 - a timing diagram of its work

The device consists of a register 1 fed through a switching element 2 and having information inputs 3, information outputs 4, a recording resolution input 5, and switching element 2 has inputs 6 and 7 which are the power inputs of the device, and a voltage control input 8 Output 9 switch

element connected to the power input of the register

The device works as follows

In the initial state, the output of the switching element 2 is closed to the bus.

7 (U 10B)

At the time point c (see Fig. 2), the voltage supply control input 8 of the switching element 2 receives the supply voltage switching signal Ua, in accordance with which at the output 9 of the switching element (at the register power input) the voltage decreases to a value that ensures perception of TTL logic levels arriving at the information input of the device (about + 5 V)

8 time t2, due to the constant time of the power supply circuit, transients in the power supply circuit of the receiving register x | YU

СО WITH XJ

The pa ends and the register is in the record ready state. Then, at time t3, a recording pulse can be sent to the write enable input of device 5, with the leading edge of which information from the data bus is entered into a register, and then at time ti the pulses from inputs 8 and 5 of the device can be cleared. After removing the pulse from input 8, the switching element 2 transfers its output to the high voltage power bus 7, and at time ts, due to the constant time of the power supply circuit on the power bus of register 1, a high voltage is set (about 10 V) providing - formational outputs of the device logical levels KMDP.

In the device due to the introduction of the switching element 2, it is possible to do without

0

five

using voltage level switches.

Claims (1)

Apparatus of the Invention A device for converting voltage levels, comprising a register, the information outputs of which are the outputs of the device, and the recording enable input is the recording permission input of the device, characterized in that, to simplify the device, it contains a switching element which is connected to the corresponding power supply voltage buses of the device, the control input is the input of the voltage control of the device power supply, and the output is connected to the power input of the register The information inputs of which are the information inputs of the device. and X U9 W 1  V3 t "t9 FIG. 2 t