SU1420602A1 - Function generator - Google Patents

Abstract

. The functional generator, the contents (of the nth sequentially included integrators, the reset inputs of which are combined, characterized in that, in order to increase stability and expand the class of generated functions, a quartz generator, the first and second keys, the amplitude detector and a pulse driver, whose input is the synchronization input of the generator, and the output is connected to the reset inputs of the integrators and to the control inputs of the first and second keys, the information input of the first integrator is connected via the key is connected to the output of the crystal oscillator; the output of the nth integrator is connected via the second key to the first oscillator code and to the input of the amplitude detector, the output of which is with the second generator output, the integrators being in the form of quartz resonators with oscillations cleared at the end of the accumulation interval. i (L

Description

four

to

ABOUT

oh oh

figure 1

The invention relates to radio engineering, in particular, to analog technology for processing and generating signals, as well as analog computing technology.

The purpose of the invention is to increase stability and expand the class of generated functions.

FIG. 1 shows a structural electrical generator circuit; in FIG. 2, time diagrams, according to his work.

The oscillator (Fig. 1) contains a series-connected quartz oscillator 1, the first key 2, n integrators 3j-3jj, made in the form of quartz resonators with oscillatory reset at the end of the accumulation interval, the second key 4, the amplitude detector 5, and also a pulse shaper 6, input 7 of which is the generator synchronization input, and the output is connected to the control inputs of keys 2 and 4 and to the integrator reset inputs, output 8 is the first output (high-frequency radio output), and output 9 - the second output (low-frequency video code) Ator.

The generator works as follows.

Continuous harmonic copecks of a quartz oscillator 1 with a frequency Lp (Fig. 2a) are gated using the first key 2 and in the form of radio pulses with a duration T and a repetition period T (Fig. 2) are fed to the input of a serial circuit, from n integrators (quartz resonators with reset). As a result of the convolution of a radio pulse with the impulse response of a series circuit of integrators 3v-3n, a radio pulse with a smooth envelope is formed at the output of the circuit by interval T (FIG. 2d, i). The shape of this envelope is the desired time function generated by the device. It can be both symmetrical (fig, 2i) and asymmetrical (fig. 2d) relative to the middle of interval T. Therefore, for periodic generator operation, it is necessary to reset (quench) the oscillations accumulated during time T on all quartz resonators of the integrators. The reset is performed on the time interval from t T to t T and in each repetition period (Fig. 2e). This interval is non-operational for the configured time.

,

Yu

15 20 5

thirty

5 0 s

0

five

Functions. To eliminate the damped oscillations of this interval at the generator output, the output signal of the last nth integrator 3 is gated during time T using the second key 4 and from its output goes to the first output (radio output) 8, where the generated time function is represented as a radio pulse envelope (see Fig. 2e, and). The same signal is fed to the input of the amplitude detector 5, at the output 9 of which the generated time function is represented as a video pulse (Fig. 2g.) „

The pulse shaper 6 serves as the dp for mapping the timing of the generator. At its input 7, clock pulses with a repetition period T (Fig. 26) are received, while at its output, video pulses of duration T (Fig. 2c) are formed right on the output side, which open keys 2 and 4 and lock the Zu-3 integrator reset circuits .

The type of time function formed depends on the number n of integrators in the circuit and on the ratio of their resonant frequencies to each other and relative to the frequency of the quartz oscillator 1. Suppose that a radio pulse U (t) Ae r is detected at the input of this cerium, which is in the interval O. t T, where T is the duration of the radio pulse or strobe in the key 2; A is its amplitude, yes; ° I) is the frequency of filling the radio pulse, is equal to the frequency of the harmonic oscillations of the crystal oscillator 1, Let g.K (t) be the impulse p € 1 of each integrator, where k 1, 2, 3 „. .. is the number of the integrator. Then the output signal of the sequential integrator circuit, is determined by the convolution of the radio pulse U (t) with the impulse response of this circuit.

The impulse response of the sequential Zt-Zg integrator chain is determined by the recurrent relation

Gn (t) J Gn., (X) gp (t - x) d, and its s-code signal is a convolution of a radio pulse U (t) with a pulse response Gp (t)

V (t) U (x) G (t - x) dxo

b

For definiteness, based on the principle of operation of the generator, suppose.

31420602

what are the numbers of resonant frequencies

gd

Tegrators coincide with the numbers of integrators k and they are upset so that; ),. ,, Then the impulse response of a chain of such equidistant

where WP LUi + -S-yy is central, the frequency of the integrator circuit3, -3, 5 and the output signal of this circuit

upset integrators 3, -3j, on-V (t) - /

(p-1) J -I

is defined as 5

h

pi and) l

  ()) .t) - e, 10 4u), - u) o) x J, i

jdW

but

 n - 1

where WP LUi + -S-yy is central, frequency of the circuit integra (n-1) J -I

pi and) l

- e, 10 4u), - u) o) x J, i

jdW

t

Claims (1)

. A functional generator containing η integrators in series, the reset inputs of which are combined, characterized in that, in order to increase stability and expand the class of generated functions, a crystal oscillator, first and second keys, an amplitude detector and a pulse shaper are introduced into it, an input which is the generator synchronization input, and the output is connected to the reset inputs of the integrators and to the control inputs of the first and second keys, the information input of the first integrator is connected through the first key to the output of the quartz oscillator, the output of the ηth integrator is connected through the second key to the first output of the generator and to the input of the amplitude detector, the output of which is the second output of the generator, and the integrators are made in the form of quartz resonators with a reset at the end of the accumulation interval.