SU416892A1 - - Google Patents

Description

one

The invention relates to discrete information processing devices and can be used in quasi-electronic and electronic automatic telephone exchanges (PBX) as scanners of the opting-in devices.

Scanning devices are known that contain a ring circuit of successively connected flip-flops and coincidence circuits, as well as gaines: "stop-static memory," count to an odd number, "stop dynamic memory, and main clock clock.

However, in the known devices it is impossible “0 to combine in one device the functions of the pulse distributor on the even and the actual number of outputs, and also it is impossible to eliminate spurious impulses at the output.

The purpose of the invention is to expand the functions of the device and eliminate spurious impulses at the output.

This is achieved by the fact that between buses "stop-static memory," remaining dynamic memory, "counting up to an odd number and a ring circuit, the command input block, executed on the match, inhibit and collective circuits, divider trigger pulses and a connecting unit, wherein the k-th output of the ring circuit is connected to the input "setting the initial state of the divider, the auxiliary input of which is connected to the inhibitor circuit, and the output is connected to the ring circuit and through the connection unit — to the input of the tenth decade of the ring circuit; A bus "counting up to an odd number is connected to the control input of the connection unit and a matching circuit, the bus" stop-static memory is connected

in conjunction with the main bus clock pulses to one collecting circuit at the input of the divider, and the bus “stop-static memory and“ stop-dynamic memory are connected to another collecting circuit on

output of the prohibition circuit of the control command input block.

FIG. 1 shows a functional diagram of the proposed scanning device; in fig. 2 - deployed functional

scheme of the proposed scanning device.

The scanning device (see Fig. 1) contains an annular device 1, a divider 2 trigger pulses, a device 3 connected to the k-th decade of clock buses and a block 4 of the control commands, complete pa of the prohibition circuit 5, the coincidence circuit 6, and collective schemes 7 , eight.

The ring device 1 (see Fig. 2) is executed on the flip-flops 9-11 and the matching circuits 2-17, with the output of each successive flip-flop connecting with the inputs of the matching circuits connected to the inputs of the previous flip-flop. The divider 2 is implemented on the flip-flops 18, 19, the matching circuits 20-23 and the collecting circuit 24. The connecting device 3 comprises a collecting circuit 26, a matching circuit 26, 27 and an inverter 28.

In the initial state, the triggers 9-11, 18 and 19 are in the state "1.0. The inputs I and II receive clock pulses. On the commands of the "stop-static memory," stop-dynamic memory and "counting up to an odd number" commands, there are "zeros (no command). In this case, the device in the mode of scanning provides protection intervals and the absence of short, parasitic impulses at the outputs I-VI.

The pulses from the inputs and and are fed to the inputs of the matching circuits 20, 21 and the matching circuits 22, 23. In this case, the prohibition scheme 5 does not function, because, as mentioned above, the “stop-memory” command is absent. Divider 2 with: each: M switching from auxiliary pulses (input II) switches alternately control pulses (input I) to the outputs of the matching circuits 20, 21, otherwise to the outputs of the ring device 1.

The ring device 1 operates in the usual way under the action of the above-mentioned pulses, and the coincidence circuit 16 is clocked by the control pulses from the output of divider 2, but not by the auxiliary pulses from the output of the prohibition circuit 5, since the command does not contain an odd number . Pulses alternately appear at the outputs of the I-VI scanning device; at the same time, there are protective intervals and there are no short parasitic pulses at the above-mentioned outputs.

When the "account to odd number" command appears (up to 5 in this scheme), the clock bus (input II) is connected to the input of circuit 16 (prohibition circuit 5) instead of control pulses from divider 2. At the same time, the command is sent to the input schemes 6 matches. In ScanOrn: Wapy of the ring device 1, when a pulse is output at output III (the fifth time pulse in one scanner bypass period), a short signal arrives at the matching circuit 6 and arrives at the initial state of the divider 2, which is steady according to the said command, in its initial state, switches the control pulse from the output of the collecting circuit 7 to the input of the matching circuit 13, thereby restarting the scanner operation cycle.

The device can be stopped in both scanning modes, in which all outputs are clocked or an odd number of outputs (the "count to odd number" command).

Let the command "stop-static memory" be posted. At the same time, "the unit enters through the collecting circuit 7 to the inputs of the matching circuits 20, 21, and through the collecting circuit 8 to the control input of the prohibition circuit 5. At the inputs of the circuits 22, 23 of the coincidence, there is no auxiliary clocking from the input bus II. A single signal for Wits at the output of the circuit 20, 21

coincidence, which at the time of the appearance of the command ("stop-static memory") commutes via a control pulse from the input bus I. The said single signal is present at the inputs or all of the circuits 12,

15, 26 matches, or at the inputs of schemes 13, 14, 17 of the assembly depending on which of the outputs of circuits 20, 21 matches the control pulse. The unit according to the output of one of the circuits 12-17 matches in accordance with the instantaneous state of the ring device 1.

When the command "stop-dynamic memory on the inputs of the circuits 22, 23 matches" (similar to the previous one), the pulses

from the input bus II are absent, but I; The M pulses from the input bus I, as in the scan mode, arrive at the inputs of the matching circuits 20, 21, pass through one of them, depending on the occurrence of the command, and the " and one of the outputs of the scanning device in accordance with its instantaneous state.

Subject invention

A scanning device containing an annular circuit of series-connected triggers and coincidence circuits, as well as the following:

"Stop-static," counting up to an odd number, "stop-dynamic memory and the main BUS of clock pulses, characterized in that, in order to expand the functions of the device and eliminate spurious impulses at the output, between buses, stop-static memory , "Stop-dynamic memory," counting up to an odd number and a ring circuit are additionally successively included a command input block performed on a match, block and collective circuits, a trigger pulse divider and a connection block, while the kth output The ring circuit is connected via input to the input of the resetter, the auxiliary input of which is connected to the prohibition circuit, and the output is connected to the ring circuit and through the connection unit to the input of the decade of the ring circuit; tire "score to odd

the numbers are connected to the control input of the connection unit and the coincidence circuit, the bus "stop-static memory is connected together With the main bus of clock pulses To one collecting circuit at the input

divider, and bus "stop-static pa56

The mute and the stop-dynamic memory-sub-input of the prohibition of the command input unit are connected to another collective directional diagram.

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