SU1385235A1 - Random signal driver - Google Patents

Abstract

The invention relates to radio engineering and communications. The purpose of the invention is to provide control of the frequency of the high frequency components of the output signals (VSBC). A source of voltage 2 and a source 3 of auxiliary voltage are used to form random signals acting on the supply circuit of load 1. Stabilization circuit of source 3 contains emitter follower 12, filter 8 of lower

Description

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frequency and analog adder 7. To simulate the low-frequency random component of the output signals, digital r-4 forms a sequence of uniformly distributed pseudo-random codes, which from the 1st group of outputs go to the DAC 6. To form the air-cone, r-13 HF is connected to the counting input of the 1st divider 1,., 1Д. frequencies. The signals from the output of Mr. 13 and the dividers 14,., 14 through the E-15 And ... 15, +, arrive at the band-pass filters 16. .. sixteen,"

The sequence of occurrence of an VSBR at the output of the analog adder 17 is determined by the pseudo-random code of Mr. 4. From the output of the adder 17, the RF components of the interfering signals are received through the switch 10, the emitter follower 9 and the high-pass filter 11 to the load 1, which provides control of the VSBF The filter 11, dividers 14, .., 14, el-And 15 ... 15 u, filters 16, .., 16, and the adder 17. 1 ill.

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The invention relates to radio engineering and communications and can be used to study the operation of systems and devices when exposed to various interfering signals.

The purpose of the invention is to provide frequency control for the high frequency components of the output signals.

The drawing shows a structural electrical circuit of a random signal generator.

Random signal generator contains load 1, voltage source 2, added voltage source 3, digital pseudo-random code generator 4, reference voltage source 5, digital-to-analog converter (DAC) 6, first analog adder 7, low-pass filter 8, second emitter repeater 9, key 10, high-pass filter 11, first emitter repeater 12, high-frequency generator 13, frequency dividers 14. ,, 14 .., 14ts, And 15, 15j, ..., 15 elements | if + i, bandpass filters 16, I6j,.,., 16 k .;, the second analog adder 17, and the first emitter n vtoritel 12 comprises transistors 18 and 19.

Shaper random signals works as follows.

To generate random signals acting on the load supply circuit 1, a voltage source 2 and an additional voltage source 3 are used, and there is a voltage source stabilization circuit 3 containing the first emitter follower 12 with the first and second transistors 18 and 19, a low-pass filter 8 and the first analog adder 7. To simulate a low-frequency random component of the output signals, digital generator 4 generates a sequence of uniformly distributed pseudo-random codes, which from the first group O nN fed to LDA 6 connected with reference voltage source 5 and the output of the DAC 6

connected to the first input of the first analog adder 7. For the formation of high-frequency components of the output signals with random moments of occurrence and a random set

frequency generator, high frequency 15 is connected to the counting input of the first of the series-connected frequency dividers 14, 14j,.,., 14, and the signals from the generator output

 HIGH frequency 13 and frequency dividers 14 ,, 142, .. ,, 14 through the elements And 15, 15j, ..., 15 c., Arrive at band-pass filters 16. ,, 16 j,. ,., 16 kg, and the sequence of occurrence

the high-frequency components of the output signals at the output of the second analog adder 17 is determined by the pseudo-random code of the digital generator 4. From the output of the second analog adder 17, the high-frequency components

More than interfering signals arrive che. cut key 10, the second emitter follower 9 and the high-pass filter 11 to the load 1, which provides control of the frequency of the high-frequency components of the output signals,

Claims (1)

Invention Formula A random signal shaper containing a high-frequency generator, a DC source connected to a voltage source, an additional voltage source, the first emitter follower and a load, a digital pseudo-random code generator, serially connected digital-analog converter 1 | and a first analog adder, a key connected in series and a second emitter follower, a reference voltage source, a low-pass filter, the output of which is connected to the second input of the first analog adder, the output of which is connected to the input of the first emitter repeater, the output of the voltage source connected to the third the input of the first analog adder, the output of the voltage source is connected to the fourth input of the first analog adder and the power input of the second emitter follower, the first and The key inputs and the control inputs of the D / A converter are connected to the corresponding outputs of the digital pseudo-random code generator, and the input of the low-pass filter is connected to the output of the first emitter repeater, in order to control the frequency of the high-frequency components of the output signals, introduced a high-pass filter, a second analog adder, 1.2, .. ,, (K + 1) band-pass filters, 1.2, ..., (K + 1) elements And, 1.2 ,,., To divisors frequencies that are connected in series, the first input is one One of the elements of AND is connected to the input of the first frequency separator and connected to the output; generator of high frequency, the first input of each of the other K elements And is connected to the output of the corresponding-. From the other K frequency dividers, the output of each of (K + 1) elements is And is connected to the input of the corresponding of (K + 1) band-pass filters, the outputs (K + 1) of the band-pass filters are connected to the corresponding inputs of the second analog adder, the output of which is connected to the third input of the key, the second input of each of (K + 1) elements And is connected to the corresponding output of the digital pseudo-random code generator, the input of the high-pass filter is connected to the output of the second emitter repeater, the output of the high-pass filter is connected to the output of the first emitt Black repeater.