SU1451831A1 - Shaper of frequency-modified signals - Google Patents

Abstract

The invention relates to a pulse technique. The purpose of the invention is to increase the frequency deviation of the output signal. The shaper contains the r-signal 1 of the control signal, the element OR 2, the elements OF, 4, the comparator 5, the trigger 6, the g-ry linearly varying voltage. In order to achieve the goal, a comparator 9 is introduced into the device, and the gaps of a linearly varying voltage are made in the form of g-ditch 7, 8 triangular voltage. The principle of operation of the former is based on the successive comparison of two triangular voltages of gaps 7.8 with the voltage of p-ra 1 of the control signal. In this case, the forward stroke of one of the triangular voltages is formed during the time of the reverse stroke of the other triangular voltage and vice versa. The change of the moves of triangular stresses occurs at the moment of equality of the stresses being compared. Mr 1 of the control signal can generate a sawtooth, parabolic, hyperbolic, exponential, and other forms of voltage depending on the law with which the module u and the frequency modulated signal need to be generated. 2 Il. with (/)

Description

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The invention relates to a pulse technique and can be used, for example, in devices using frequency-modulated pulses, 5

The purpose of the invention is to increase the frequency deviation of the output signal.

Figure 1 shows the structural electrical circuit of the proposed shaper of frequency-modulated 10 signals; figure 2 - timing charts of his work.

The shaper of frequency-modulated signals contains a control signal generator 1, the element OR 2, 5; the first and second elements are AND 3, A, the first comparator 5, the trigger 6, the first and second generators of linearly varying voltage, which are made

left potential (figure 2 c, d). As a result, there are no triangular voltage signals at the outputs of generators 7 and 8 (Fig. 2e, e). Comparators 5 and 9 are in the initial stable states, at which zero potentials are established at their outputs, and, therefore, at the output of the element OR 2 (Figures 2g, 3, and). The trigger 6 is in an arbitrary state, for example, in the unit state, when at its forward output the potential is equal to one, and on the inverse state it is zero.

With the arrival of a trigger pulse (Fig. 2a), just the potential of a logical unit, a control signal is formed at the output of generator 1, the voltage of the linearly falling voltage

shy tensions, vsho.sh.i. . The potential of the impulse is triggered in the form of generators 7 and 8 of a triangular v. "" "" P "" "P

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voltage, second comparator 9.

Shaper frequency-modulated signals is as follows

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The principle of operation of the frequency-modulated signal generator is based on the successive comparison of two triangular voltages of the generator 7.8 with the voltage of the control signal generator 1. In this case, the forward stroke of one of the triangular stresses is formed during the time of the reverse stroke of the other triangular stress, and vice versa, the shift of the triangular stresses occurs at the moment of equality of the compared stresses.

The control signal generator 1 can generate voltage sawtooth, parabolic, hyperbolic, exponential and other forms, depending on the modulation law with which the frequency-modulated is necessary to form

signal.

The forward stroke of each successive triangular voltage pulse of the generators 7, 8 begins to be generated not from zero, but from some residual level, U,

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(Fig.2 d, e), which-to

The cable entering the interconnected inputs of the AND 3 and 4 elements is permitting. At the output of the element I 3, a single potential is established (Fig. 2c), during which at the output of the generator 7, a forward stroke of a triangular voltage (Fig. 2e) is applied to one of the inputs of the comparator 5.

At the time of equality of the voltages of the generators 1 and 7, the comparator 5 overturns. At its output, a short pulse is formed (fig. 2g), which through the element OR 2 (fig. 2i) enters the counting input of the trigger 6 and switches it to the zero state. At the output of the element And 3 is set to zero potential (Figure 2b). At the output of the generator 7, a reverse flow of the triangular voltage is formed (Fig. 2e). Comparator 5 is reset. Simultaneously with the switching of the trigger 6, the potential of the logical unit (FIG. 2d) appears at the output of the element 4, during which the forward stroke of the triangular voltage (FIG. 2c) to the comparator 9 is generated at the output of the generator 8.

At the time of equality of the voltages of the generators 1 and 8, the KONmapaTop 9 is tilted. At its output a pulse is formed (Fig. 2z), which through the element OR 2 (Fig. 2i) enters the

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the same grows from impulse to impulse.

In the source --- / :; 7 nGvy-55 counting input of the trigger 6 and the switching of the pulse, em in one state. The output of the generator 1 1} during the element And And sets the initial voltage Uo (Fig. / B; and the ID at the outputs of the elements 3 and 4 - well

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zero potential (figg). On the vent to the potential (Fig.2 c, d). As a result, there are no triangular voltage signals at the outputs of generators 7 and 8 (Fig. 2e, e). Comparators 5 and 9 are in the initial stable states, at which zero potentials are established at their outputs, and, therefore, at the output of the element OR 2 (Figures 2g, 3, and). The trigger 6 is in an arbitrary state, for example, in the unit state, when at its forward output the potential is equal to one, and on the inverse state it is zero.

With the arrival of a trigger pulse (Fig. 2a), namely, the potential of a logical unit, a control signal is applied to the output of the generator 1 and the voltage of the linearly incident voltage

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The cable entering the interconnected inputs of the AND 3 and 4 elements is permitting. At the output of the element I 3, a single potential is established (Fig. 2c), during which at the output of the generator 7, a forward stroke of a triangular voltage (Fig. 2e) is applied to one of the inputs of the comparator 5.

At the time of equality of the voltages of the generators 1 and 7, the comparator 5 overturns. At its output, a short pulse is formed (fig. 2g), which through the element OR 2 (fig. 2i) enters the counting input of the trigger 6 and switches it to the zero state. At the output of the element And 3 is set to zero potential (Figure 2b). At the output of the generator 7, a reverse flow of the triangular voltage is formed (Fig. 2e). Comparator 5 is reset. Simultaneously with the switching of the trigger 6, the potential of the logical unit (FIG. 2d) appears at the output of the element 4, during which the forward stroke of the triangular voltage (FIG. 2c) to the comparator 9 is generated at the output of the generator 8.

At the time of equality of the voltages of the generators 1 and 8, the KONmapaTop 9 is tilted. At its output a pulse is formed (Fig. 2z), which through the element OR 2 (Fig. 2i) enters the

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55 counting trigger input 6 and switches it to the single state. At the output of the element, And A is set to id.

the counting input of the trigger 6 and switches it to a single state. On you the course of the element And And is established by id.

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zero potential (figg). At the output of the generator 8, a reverse coagulation voltage is generated (Fig. 2e). Comparator 9 is reset. At the same time, the output of the generator 7 generates the forward stroke of the triangular voltage, but not from zero, but from some residual U, which allows to increase the frequency deviation of the output signal.

Further, the processes in the circuit are repeated.

Thus, at the output of the AND 3 element (the AND 4 element), a frequency-modulated signal is output to the output of the device.

At the moment of termination of the input video pulse, the initial voltage Up is established at the output of the generator 1. At the same time, elements 3 and 4 are closed, at the outputs of generators 7 and 8 are set to zero potentials.

Claims (1)

Invention Formula A frequency-modulated waveform generator comprising a series-connected control signal generator and a first comparator, a series-connected trigger, a first And element and a first linearly varying voltage generator, a second And element in series, the first input of which is connected to the inverse trigger output and the second the generator of linearly varying voltage, as well as the OR element, while the input of the generator of the control signal is connected to the second input of the first element AND and to the second input The second element And is the input of the trigger signal of the frequency-modulated signal generator, characterized in that, in order to increase the output frequency deviation, between the output of the control signal generator and the first input of the element OR a second comparator is entered, the first and The second generator linearly changes the Kits voltage in the form of triangular voltage generators, the outputs of which are connected respectively to the second input of the first comparator and the second input of the second comparator, while the output of the first th comparator is connected to a second input of OR gate whose output is connected to the input trigger. et J. Ji i I I t I I MillJ pn I-I GPP P P P P J. Ji i FIG. 2