SU1325710A1 - L-digit coder - Google Patents

Abstract

The invention relates to computing, in particular to devices for generating coded signals. The invention makes it possible to reduce the hardware cost of a 1-bit coder, i.e. simplify its design without changing its functions. The 1-bit coder contains the element OR 1, 1/2-bit coders 2 and 3, a block of 4 keys, 5 load elements, inverters 6, a one-shot 7 and a filter 8. A block of 4 keys contains X keys 12. KS-filter 8 contains a resistor 13, a diode 14 and a capacitor 15. 2 3. p. f-crystals, 1 ill. CO 1C O1 M

Description

one

The invention relates to computing, namely to devices for generating coded information.

The purpose of the invention is the simplification of a 1-pd coded encoder.

The drawing is a schematic diagram of a 1-bit coder,

1 bit coder contains the element OR 1, the first 2 and the second 3 1/2-bit coders, a block of 4 keys, load elements 5, an one-shot inverter 7 and an RC filter 8, Informational 9 and building 10 outputs 1 are also recognized -Discharge encoder, power supply bus 11.

Block A of keys contains 2 x 2 keys 12,

RC filter 8 contains a resistor 13, a diode 14 and a capacitor 15,

In addition, marked tire 16 of zero potential.

The 1-bit coder works in the following way.

In the first mode of operation, all keys 12 of block 4, containing 2 keys in each of 2 groups, are open. In this case, all the inputs of the first and second 1/2-bit encoders and 3 are given high-level signals, which correspond to the signals of the low-level and zero-co signal at the output of the encoder. In the second mode, one of the keys is closed. For example, I will close the second key 12 of the first group. This changes the state of the second input of the first 1/2-bit shipper 2 from high level to low. A change in the signal at the input of the corresponding inverter 6 causes a change in the state of its output and, as a result,

In this case, the first input of the second 1/2-bit encoder 3 from high to low. In response to a change in the input state at the output of the first 1/2-bit encoder 2, a key number 12 code appears in the group, and at the output of the second 1/2 bit coder 3, the group number code appears, which includes This key is 12. In this case, the code at the outputs 9 of the 1-bit coder corresponds to the number of the key 12. This code goes to the inputs of the element OR 1, at the output of which a high level signal appears. This signal always appears when the code at the outputs 9 of the 1-bit coder is different from zero, i.e. at

0

f,

5 f

closing any key 12 except the zero key 12 (the first horizontal) of the zero group; From the output of the element OR 1, the signal is fed to the input of the RC filter 8, where short bounce pulses that occur during the closing and opening of the keys 12 of the block 4 are filtered. amplified by a diode 14 connected in the forward direction to the discharge circuit of the capacitor 15, whereby the resistance of the discharge circuit and, consequently, the discharge time is much less than the charging time of the capacitor 15.

From the output of the HC-filter 8, the filtered signal is fed to the input of the single-vibrator 7, where it is converted to 0 a short strobe pulse, which is fed to the output 10 and can be used for gating the transmission of a code.

formula of invention

Claims (1)

1. A 1-bit coder containing an OR element and two E / 2 bit coders, the outputs of which are information outputs of a 2-bit encoder, characterized in that, in order to simplify the resolution of the encoder, a block of keys, load elements, inverters, one-shot and RC-filter, one of the first outputs of the key block through the load element connected to the power bus, the remaining first outputs of the key block are connected to the same inputs of the bits of the first t / 2-bit encoder and through the corresponding load elements connected The second outputs of the key block are connected via corresponding inverters with the same inputs of the second P / 2 bit encoder, the output of the OR element is connected via an RC filter to the input of the one-vibrator, the output of which is gQ is gating output f- bit coder, the inputs of the OR element are connected to the outputs of the first and second / 2-bit coder, 2, the encrypter of claim 1, wherein the block of keys contains a zero potential bus and key groups, the first key contacts in each of the groups are respectively combined and are the corresponding first outputs of the block, the second key contacts of the first group connected to the zero potential bus, the second contacts of the keys of the remaining groups, respectively, are combined and are the corresponding second outputs of the block. 3, the encoder of claim 1, ex. due to the fact that the rc filter a pp 1325710 contains a capacitor, pp chills and. connected resistor and diol, and a type of zero potential, anode dmpd; 1 is connected to the first plate of the condenser), the second plate of which is connected to the zero bus, the cathode is the input of the filler, ayod the diode is output 5