SU372685A1 - DEVICE FOR TRANSFORMING DISCRETE INFORMATION INTO PWM SIGNAL - Google Patents

Description

The invention relates to a discrete communication technique and can be used in quasi-electronic and electronic PBXs as a converter of discrete information into a PWM signal (pulse-width modulation) proportional to the number of input signals.

A device for converting discrete information into a PWM signal is known, which contains a ring register on triggers, coincidence circuits, collective circuits, and an output trigger.

The aim of the invention is to generate an output signal proportional to the number of input signals.

The goal is achieved by the fact that the output of the first trigger of the ring register is connected to the output of the output trigger via a matching circuit, to the second input of which the output of the last bit matching circuit of the ring register is connected, and the other output of the first trigger of the ring register is connected directly to the other input of the output trigger.

FIG. 1 shows a device for converting remote information to a ShIM signal; in fig. 2 - time diagrams of his work.

The device contains collecting circuits / -5 (by the number of input signals), a ring register on the 6-II flip-flops (the number of flip-flops is equal to "+") and matching circuits 12-23 output flip-flop 24 with a matching circuit 25 at its input.

Input signals are provided to device inputs 26-30. The clock pulses (Fig. 2, a) are input to the input 31, and the delayed clock pulses (Fig. 2.6) are fed to the input 32.

In the initial state, at inputs 26-30 there is a single signal (no call), triggers 6 - // are in the state "1, trigger 24 - in the state" O.

With the arrival of a pulse at the input 31, the triggers 6 - // successively switch to the zero state. When the trigger is switched, AND trigger 6 and, therefore, trigger -10 returns to the one state. Next, the switching of triggers is stopped before a pulse delayed relative to the pulse at input 31 arrives at input 32. At the same time, the signal of the minimum Gmin duration equal to the time shift between the pulses at inputs 31 and 32 is removed from the device output 24}.

If there are zero signals at the inputs 26-30, the output signal of the circuit produces a signal with a maximum duration of 7max 71mi11 + 5t, where t is the period of the clock pulses. In general, the duration of the output

the pulse is 7 Tm11G1 + t, where k is the number of calls, 1. e. the number of fixo / tofi with zero signals. FIG. 2c, d, e, f, g are the states of the inputs 26-30, respectively; in fig. 2z, - the corresponding output signals.

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To convert discrete information into a PWM signal containing a ring register on triggers and coincidence circuits, collective circuits, and output

A trigger, characterized in that, in order to form an output signal proportional to the number of input signals, the start of the first trigger of the collet register is connected to the input of the output trigger via a common control circuit, to the second input of which there is a single output of the coincidence circuit and the last bit of the ring register, and another output The first trigger of the ring register is connected to another input of the output trigger directly.