SU760399A1 - Sweep generator - Google Patents

Description

The invention relates to radio engineering and can be used in radio engineering devices for generating signals of equal duration e gradually, increasing high frequency of the reference frequency signal.

“• The oscillator of the oscillating frequency is known, containing a master oscillator and an electronic key connected to the control unit, as well as by reconfiguring the band-pass filters, which are cumbersome and inertia restructuring, as a result of which the oscillator has a small oscillation speed! 11

The closest to the technical solution proposed by P05 is the oscillating frequency generator, which contains a master oscillator, a control unit, N channels, each of which contains a key and a modulator, and 20 also have a total load for all channels.

However, the well-known generator also provides an insufficiently high frequency sweep rate. 25

The purpose of the invention is to increase the frequency sweep frequency.

To do this in the famous generator

oscillating frequency, containing master oscillator, control unit, N 30

channels, each of which contains a key and a modulator, as well as a total load for all channels, between the output of the master oscillator and the key input, a generator with phase locked loop is introduced into each channel, between the modulator output and the total load for all channels in each of the channels A radio pulse stretching unit is introduced, the output of the master oscillator is also connected to the input of the control unit, the output of which is connected to the control input of each of the keys, and between the output of the master, generator and control inputs of all the module Hur introduced common to all channels the formation _minutes rovatel pulses, wherein each of the key channel output connected to an input of the modulator.

The drawing shows a structural electrical circuit of the proposed generator. '

The oscillating frequency generator contains a master oscillator 1, N channels each of which contains a generator · 2 with phase locked loop (PLL), a key 3, a modulator 4, a unit 5 for stretching radio pulses, a common load for all channels 6, a driver 7 pulses and a block 8 for control .

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760399

The generator works as follows.

The master oscillator 1, which determines the long-term frequency stability,

Using the rings, the phase auto-tuning frequency synchronizes the oscillators 2. The mutual frequency shift of the oscillators 2 is equal to the sweep step (frequency sweep). The pulse shaper 7, the control unit 8, the keys 3 and the modulators 4 at certain times form radio pulses, the duration of which is set by the control unit 8. . Radio pulses contain all the necessary frequency components (linear spectra). Linear spectra shifted to each other by the sweep step are fed to the corresponding blocks 5 of the stretching of radio pulses. On.the outputs of blocks 5 stretching radio pulses are obtained sequences of signals of equal duration with a gradually increasing or decreasing frequency, supplied to the load 6, in which

a common signal is formed with temporary compression. Bloch 5 stretching of radio pulses can be performed on the basis of a matched filter (dispersive delay line) on surface acoustic waves (SAW), where oscillations with different frequencies pass different paths and undergo a different delay.

The frequency of short pulses at the output of the pulse shaper 7 is determined by the resolution of blocks 5. The number of paths is chosen equal to the ratio of the resolution of blocks 5 and the required sweep step.

Thus, in the proposed generator for. The expense of introducing the stretching blocks of radio pulses in N channels with shifted spectra significantly increases the frequency sweep rate.

five

Claims (1)

Claim Swing frequency generator, with. _ holding the master oscillator block control, N channels, each of which contains a key and a modulator, as well as a common load for all channels, characterized in that, in order to increase the frequency rate of the frequency, between the output of the master oscillator and the key input, a generator with phase automatic frequency control, between the output of the modulator and the total for all 20 channels are loaded into each of the channels by a stretching unit of radio pulses, the output of the master oscillator is also connected to the input of the control unit, the output of which is connected to the equipotential input of each key, and a pulse generator common for all channels is inserted between the output of the master oscillator and the control inputs of all modulators at the same time in “For each of the channels, the output of the dongle ^{30 is not} connected to the modulator input.