SU1545234A1 - Function generator - Google Patents

Abstract

The invention relates to automation and computing and can also be used in devices for measuring equipment and instrument engineering. The purpose of the invention is to expand the functionality by controlling the parameters of the spectrum of the output signals. The generator contains a frequency control unit 1, an integrator 2, a converter 3, a voltage generator 4, a key element 5, a relay element 6, a pulse generator 7 with controlled duration, and generator inputs and outputs. The envelope of the output sinusoidal oscillation has the shape of SIN X / X, and its maximum moves along the frequency axis when the frequency of the function generator changes or when the control voltage is applied to input 8. The amplitude of the spectrum envelope is proportional to T / (T + Τ.) 2 or .

Description

ate

N9

The invention relates to automation and computing and can also be used in devices for measuring equipment and instrument engineering.

The purpose of the invention is to expand the functionality by controlling the parameters of the spectrum of the output signals.

FIG. Functional diagram of the generator is presented; figure 2 - timing charts of the generator.

The functional generator contains a frequency control unit 1, an integrator 2, a converter 3, a voltage generator 4, a key element 5, a fixed element 6, remspiiTop 7 pulses with a controlled duration, a frequency control input 8 Functionally

generator, HI move

about

with mix of our bullets;

25

output 10 of a sinusoidal signal, input 11 of a triangular signal and output 12 of a rectangular signal Functional indicator.

Functional generator operates as follows.

The first input of the integrator 2 receives a constant voltage from the output 1 of the frequency control. Our. pi cm pa ra 2 Normalized linearly from the YU y of the voltage U (t), which, having reached the threshold of operation of the relay - element 6, switches it. In this case, the threshold 6 and the output voltage of the frequency control unit 1 change their signs to opposite ones, remaining the same in absolute value, the voltage slope on the B1 output of the integrator 2 changes its sign. When the output voltage of the integrator 2 reaches the new threshold of the relay element 6, the sweep is repeated, etc. Thus, at outputs 11 and 12, 45 triangular and rectangular oscillations are normalized ((ig2, b and c) at time intervals

At the output of the generator 7 there is a pulse signal of the form (lig.2a), which is supplied to the key element 5, the relay element 6 and the output 9 of the function generator. At time intervals (,), the key element 5 opens and the voltage U (t) goes directly to the charge capacity of integrator 2, so that at times (the initial conditions on integrator 2 are exactly the same as U (t2 (U,)). In addition, at times t, the output voltage of the relay element 6 is forced to set to a fixed position, for example, the lower one (Lig.2c: at times 0 and t, the output voltage of the relay element 6 is already in the lower position; at time t it is set to forcibly).

The output spectrum is linear if U (t) is a deterministic function. If U (t) U0, where U0 is a constant, the components constituting the spectrum are located at frequencies n, where m and l, i.e. functional gene- 1 iup works in multiply mode

30 frequency F. If U (t)

,

Spectrum components are located at fJriF frequencies. If U (t) is a random function of time, the spectrum of the output signal is continuous within the relay element of the envelope.

In each case, the spectral envelope of the output sinusoidal oscillation has Lorma sinX / X, and its maximum moves along the frequency axis when the frequency of the function generator changes or when the control voltage is applied to the & input. The amplitude of the spectrum envelope is proportional to the value of T / (T + Ј).

40

m

formula of invention

in

),

where n

Pa

50

1. A function generator, comprising a series-connected relay element, the output of which is the output of the function generator’s rectangular signal, a frequency control unit having an external frequency control input, an integrator,

sinusoidal (figure 2 g). the output of which is connected to the first input of the relay element and is the output of the triangular signal of the Function generator, and the converter whose output is output

(from 2ts- (

same intervals the outputs of the key

element 5 and generator 7 of pulses with control lasts of duration do not affect respectively the operation of integrator 2 and burdock element 6, and converter 3 normalizes from a triangular signal

At the output of the generator, it is normalized, for example, to the drcr (t), which changes the de- fects with a scroll (iirr.2r, -.1: or cnvuaf HF-iM).

0

five

five

At the output of the generator 7 there is a pulse signal of the form (lig.2a), which is supplied to the key element 5, the relay element 6 and the output 9 of the function generator. At time intervals (,), the key element 5 opens and the voltage U (t) goes directly to the charge capacity of integrator 2, so that at times (the initial conditions on integrator 2 are exactly the same as U (t2 (U,)). In addition, at times t, the output voltage of the relay element 6 is forced to set to a fixed position, for example, the lower one (Lig.2c: at times 0 and t, the output voltage of the relay element 6 is already in the lower position; at time t it is set to forcibly).

The output spectrum is linear if U (t) is a deterministic function. If U (t) U0, where U0 is a constant, the components constituting the spectrum are located at frequencies n, where m and l, i.e. functional gene- 1 iup works in multiply mode

0 frequency F. If U (t)

,

m

formula of invention

FIG. 2

Claims (3)

Claim 1, a Functional generator comprising a series-connected relay element, the output of which is the output of the rectangular signal of the functional generator, a frequency control unit having an external frequency control input, an integrator, the output of which is connected to the first input of the relay element and is the output of the triangular signal of the Functional generator, and a converter whose output is the output / sine wave of the Function Generator, a key element whose output is connected to nomu input of the integrator, and the control input is the output of sync pulse function generator and connected to the control input of the relay element, characterized in that in order to expand functional features due to, control of the spectrum _parameters: output signals, it introduced a voltage generator connected output to the signal the input of the key element, and a pulse generator with a controlled duration, connected by the output to the control input of the key element. 2. The generator according to claim 1, characterized in that, with the purpose of expanding the scope of application by providing adjustment of the initial phase of the output signal within 5 -90 .., + 90 °, the voltage generator is made in the form of a source of adjustable reference voltage. 3. The generator according to claim 1, about l and 1θ, characterized in that, with the goal of expanding the field of application due to mixing-frequencies, the voltage generator is made in the form of a periodic oscillator. 15 4. The generator according to claim 1, with respect to the fact that, with the goal of expanding the scope due to the continuous distribution of frequency components within the spectrum, the voltage generator is designed as a noise generator. FIG. 2