SU1241437A1 - Unipolar signal-to-bipolar signal converter - Google Patents

Abstract

The device relates to a pulse technician. It can be used in automation and remote control devices. The purpose of the invention is to enhance the functionality, increase the noise immunity. A device containing element 2 BE ;, resistors 4.5 and 6, transistor 11, capacitor 12, source 13 of bipolar signals, actin 16, information 17, output 18, has been entered into the device: frequency divider 1 , element 2-2-PII 3, transistor 10, optocouplers 8 and 9, resistor 7, source of unipolar signals, switch 15. In the application materials, the operating modes corresponding to the three positions of the switch 15 are considered. bus 18, a signal is formed with a clock frequency and with a voltage dependent on the potential on bus 16 and 17. When the second position of the switch on the bus 18 of the device will generate a signal with no average level, but a repeating signal on the bus 17. In the third position, the information signal is encoded by pulses of the clock frequency. 4 il. i (L 8x. 4 p. Fig.1

Description

The invention relates to an impulse technique and can be used in automation and remote control devices.

The purpose of the invention is to enhance the functionality and increase noise immunity.

FIG. 1 shows the electrical functional scheme of the device; in fig. 2 - 4 - timing charts of the device.,

The device contains a frequency divider t, element 2, element 2-2 or 3, resistors 4–7, optocouplers 8 and 9, transistors 10 and 11, capacitor 12, source 13 of bipolar

signals, source 14 unipolar

I.

signals, switch 15, clock bus 16, information bus 17, output bus 18.

The device works as follows.

At the first position, the switch 15 (Fig. 2) of the signal from the frequency divider 1 prohibits the passage of the signal from the information input through the first part of the element 2-2И-OR 3 and the second part of it works. Upon receipt of zero potentials at the clock 16 and information bus 17, a zero potential is formed at the output of element 2-2-OR 3, current flows through the optocoupler 9, transistor 11 opens, and zero potential is formed on the device bus 18. If on informational logic O and on clock bus 16 is logical 1, logical O is formed at the output of element 2-2И-OR 3, current flows through optocouplers 8 and 9, transistors 10 and 11 are opened, and a negative voltage level is generated at the output of the device. When logic level 1 arrives at the input buses 16 and 17, a high potential is formed at the output of element 2-2, OR 3, current does not flow through optocouplers 8 and 9, transistors 10 and 11 close, and a positive voltage level is formed on device bus 18 .

At the second position of the switch 15 (Fig. 3) at the output of divider 1, the frequency of logic O, prevents impulses from passing through the information bus 17 through the first half of element 2-2И-OR 3. To one of the inputs of the second half of element 2-2И-ИЛ 3 a potential of logical 1 is connected from a source of 14 unipolar signals

five

0

fishing The signal at the output of element 2-2-OR 3 is formed in accordance with the signal on the data bus 17. Optocouplers 8 and 9, as well as transistors 10 and 11, are opened and closed simultaneously, and on the device bus 18, a signal is generated. but a repeating signal on the information bus 17.

In the third position of the switch 15 (Fig. 4), clock signals with a frequency of K times less pass through the first half of element 2-2И-Ш1И 3 than at zero level on bus 17, since the output of frequency divider 1 is connected to one of the inputs and through the second half of the element 2-2И-OR 3 clock signals, pass through at a positive voltage level on the data bus 17. Therefore, on the bus 18 of the device, two-pole impulses are formed without an average level at a voltage of logical 1 s frequency equal to the frequency of the pulses on, 5 clock bus 16, and p voltage and a logic O - a frequency K times less than the frequency of the pulses on clock .shine 16, i.e., the information signal is encoded by a pulse. mi frequency of frequency. At the same time, galvanic isolation of the power supply of information and bipolar signals is provided.

0

Claims (1)

Invention Formula  The converter of unipolar signals into bipolar, containing a clock bus, an information bus connected to the input of the element NOT, a first resistor, the first output of which is connected to the emitter of the transistor, the receiver of which is connected to the first end of the second resistor G and through a capacitor to the output of the device, the second the output of the second resistor is connected to the first output of the third resistor and the positive bus source of bipolar signals, characterized in that, in order to extend the functionality by coding the level It unipolar signal pulses of different clock frequencies and increase noise immunity, it introduced a source of unipolar signals, an additional transistor, the first and second optocouplers fourth resistor 2-2I IPD-element divider. 3124 frequencies, a switch, the first and second contacts of which are connected to the clock bus, the third and fourth contacts to the positive bus of the source of the unipolar signal, the fifth and sixth contacts to the common bus, the seventh to ontact contact to the first input of the 2-2И-OR element , the first output of the first optocoupler and the first input of the frequency divider, the setup input of which is connected to the eighth contact of the switch, and the output - to the second input of element 2-2И-OR, the third input of which is connected to the output of the element NOT, the fourth input - with the information bus, exit h the fourth cut UHgj.Sx. I I A sepp in / x. V / h.pppp Uuu Uuuu not.2 Compiled by S. Ermakov Editor M. Nedoluzhenko Tehred L. Oleinik Proofreader T. Kolba Order 3612/54 Circulation 81.6 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 74 the resistor is connected to the first second of the optocoupler and the second output of the first optocoupler, the third output of which is connected to the second output of the third resistor and the second output of the second optocoupler, and the fourth output to the base of the additional transistor, the emitter of which is connected bipolar signals and the second output of the first resistor, and the collector with the emitter of the first transistor, the base of which is connected to the third output of the second optocoupler, the fourth output of which is connected to the positive single-field source bus wow signal. rhhhhhhhhhhhhh Jig FIG.