SU1196913A2 - Step-voltage function generator - Google Patents

Abstract

FUNCTIONAL STEPPED VOLTAGE GENERATOR on auth. No. 877581, characterized in that, in order to expand the field of application by allowing bipolar periodic signals to be generated, it contains a third counter, a third decoder, an OR element, a shift register and an AND element, two inputs of which are connected respectively to the output of the register the shift, the output of the element OR, and the input of the sign bit of the linear code-voltage converter, the input of the third counter is connected to the output of the phase shifter, and its bit outputs are connected via the third decoder to the corresponding the inputs of the OR element connected by the output to the input of the shift register.

Description

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The invention relates to automation and computing, in particular, to digital-analogue generators, to tori of functional change of voltage, and is an improvement of the known device described in the ATV. No. 877581.

The purpose of the invention is to expand the field of application of the generator by allowing the formation of bipolar periodic SI1 signals.

Fig, 1 shows a block diagram of a functional generator; in fig. 2 - timing charts of the function generator.

The proposed functional generator circuit includes a pulse generator 1, the output of which is connected to the counting input of the first counter 4 through series-connected divider 2 frequencies with a variable division factor and the phase shifter 3. The discharge outputs of the counter 4 are connected to the inputs of the first decoder 5 and to the inputs of the function generating unit 6 Walsh. The output of the decoder 5 is connected to the counting input of the second counter 7 connected by the bit outputs to the inputs of the second decoder 8, the outputs of the decoder 8 are connected to the control inputs of the switch 9 connected by the signal inputs to the outputs of block 6, and the output to the counting input of the reversible counter 10. The outputs of the bits of the meter U are connected to the information inputs of the linear code-voltage converter 11. The third counter 12 is connected by a counting input to the output of the phase shifter 3, and the bit outputs to the inputs of the third decoder 13. The outputs of the decoder 13 through the OR element 14 are connected to the first input of the AND 15 element and through the shift register 16 to the second input of the AND 15 output which is connected to the input of the sign bit of the linear transducer 11 codepression. The output of this converter is the output of the function generator.

Functional generator operates as follows.

The pulse sequence from the output of the generator 1 is fed to the successively connected divider 2 and phase shifter 3, with the help of which the adjustment is made

69131

the repetition period and the phase of the pulses fed to the counting input of counter 4 and the counting input of counter 12. Walsh function generation unit 6,

implemented, for example, on modulo-two adders, at each time interval T between successive overflows of counter 4, Walsh functions are formed with the number of pulses 1,2,3, ..., (where c is the counter size 4) and analogs of these functions that are out of phase by 90.

Sort by block 6 pulsed signals are sent to the corresponding

5 signaling inputs of the switch 9, which is a combination of a group of two-input AND elements, whose outputs are connected to the inputs of its output element OR.

0 The first and second inputs of the And elements represent respectively the signal and control inputs of the switch 9.

Decoder 5 decodes null

5 states of the counter 4, which correspond to the boundaries between each two adjacent parts of the approximation of the function reproduced by the generator. Under the influence of the weekend

0 pulses of the decoder 5, the counter 7 changes its state, with the result that every time on one of the outputs of the decoder 8 there appears an output signal allowing the passage to

 the output of the switch 9 of one of the pulse sequences from the outputs of block 6. The pulses from the output of the switch 9 are fed to the input of the reversible counter 10, the state of bits

0 which is converted into output step-variable functional voltage by code-voltage converter 11.

The decoder 13 decodes certain (including zero) states of the counter 12, the time base of which is equal to the time base of the function being formed. The output pulses of the decoder 13 are assembled by the OR element 14. On the front of the output pulse of the element OR 14, the element 15 evaluates the level of the output signal of the register 16 and, by decay, shifts by one bit the information preset in the register 16 that determines the order of the phase change output signal function generator. Depending on the information of the register 16, the element 15 also forms or does not generate a signal to change the sign of the output voltage of the converter 11. By this signal, the trigger of the sign of the converter 11, made, for example, in the form of a trigger operating in addition mode modulo two changes its state to inverse, thereby changing the sign of the function being formed. At the same time, at the output of the functional generator, a bipolar periodic signal, a phase-shift key signal and a frequency-manipulated signal can be obtained (FIG. 2, for the case of a trevorot entry element OR 14),

Fig. 2 shows the formation of periodic bipolar and phase-manipulated signals.

A bipolar periodic signal is generated if the output signal of register 16 takes the value of Log, 1 only at the instants of time equal to the time base of the function being formed (moments t, t, t, ty, fig 2)

The PhaoomIpulted signal, the phase of which changes abruptly by 180 °, is formed, in particular, if the output signal of register 16 takes the value Log, O at some points in time (time tj, Fig. 2). If the output signal register I6 takes

Neither Log. About also at the moments of time, different from t, the phase-mani signal of a more complex form is formed.

Frequency-controlled signal

formed by changing the division factor of divider 2.

Exit F TJUL-41-All-- | LJ

Claims (1)

FUNCTIONAL STAGE VOLTAGE GENERATOR according to ed. No. 877581, characterized in that, in order to expand the scope by providing the possibility of generating bipolar periodic signals, it contains a third counter, a third decoder, an OR element, a shift register and an And element, two inputs and the output of which are connected respectively to the output of the shift register the output of the OR element and to the input of the sign discharge of the linear code-voltage converter, the input of the third counter is connected to the output of the phase shifter, and its bit outputs are connected through the third decoder to the corresponding inputs I give OR gate connected to the input of output shift register. Phi. 1 SU., „1196913