SU828372A1 - Linear frequency-modulation signal shaper - Google Patents

Description

The invention relates to radius: tgle and can be used z .. 5er)) telnoy technique.

A linear frequency modulated signal conditioner is known that contains a series-connected linear frequency modulated (LFM) signal generator, a mixer, to another input of which the local oscillator output, phase comparison unit, low pass filter, error coder, and adder are output, which is connected to the winding input of the chirp signal generator, and also a synchronizer, the first output of which is connected to the input of the form controller,:, the second output is connected to the shift register; at Odom zhei sawtooth generator; whose output is connected to the second .; the input of the adder 1.

However, the well-known shaper has big frequency distortions: - ;; output signal.

The purpose of the invention is to reduce the frequency distortion of the output signal.

To do this, in the former with the linear frequency module 1 and its heterodox 1 is controlled, the eio control inputs are connected to the corresponding shift register outputs, and the synchronization input is connected to the first synchronizer output.

In the drawing there is a structural electrical circuit of the proposed form and the transmitter.

The driver contains a generator / chirp signals, a mixer 2, a block .3 sraven; 1 phase, a low pass filter 4, an error amplifier 5, an adder 6, a local oscillator 7, a synchronizer 8, a driver 9 oori nmiuls, a register 10 sdeega, a generator / 7 niloobraznogo iair marriage.

Formaker works as follows. The LCL1-sial from the geerator and enters the mixer 2, where it is mixed with the signal of the local oscillator 7, which is synchronized by the signal of the synchronizer 8 and controlled by the signal of the register 10.

After conversion, the composite signal, which is a set of hp coherent partial LCH.M signals, is supplied to block 3. At the second input of the latter, reference pulses are sent from the former 9. The error signal, proportional to the phase mismatch, after filtering in filter 4 and amplification in ycvil; 1tel 5 enters an adder 6. In adder 6, the algebraic addition of the error signal and the driving voltage from the generator is given //. Lod action c:, t of the resulting signal provides a linear change in the frequency of oscillations of the generator 1.

Thus, the proposed shaper allows reducing residual frequency distortions of the formed super-wideband chirp signal.

Ph o P m u l a i 3 o b ip et n u

A linear frequency modulated waveform generator that contains serially connected oscillators of frequency-modulated signals, a mixer to which another input is connected to a local oscillator output, a phase comparison unit, a low-pass filter, an error signal amplifier, and an adder whose output is connected to a control the input of the generator of frequency-modulated S1 ggialov, also a synchronizer, the first output of which is connected to the input of the driver of the reference pulses, and the second output - with cn | pa1Vl yush; in-yoke and control input of the lilac-shaped voltage generator, the output of which is connected to the second inlet, and of the adder, that is, in order to reduce the frequency distortion of the output signal, the local oscillator is controlled These inputs are connected to the corresponding shift register outputs, and the synchronization input is connected to the first synchronizer output.

Source of information taken into account .npiH expertise:

1. US patent No. 3621450, cl. 331-10, 20 971 (prototype).

Claims (1)

FORMULA AND S PREPARATION ^! A linear frequency-modulated signal generator, comprising a series-connected linear-frequency-modulated signal generator, a mixer> 5, a generator, a local oscillator output, a phase comparison unit, a low-pass filter, an error signal amplifier and an adder, the output of which is connected to a control input a generator of linearly-frequency-modulated signals, I also have a synchronizer, the first output of which is connected to the input of the driver of the reference pulses, and the second output is connected to the control input of the sdv repistor the yoke and the control input of the sawtooth generator, the output of which is connected to the second input of the adder, which means that, in order to reduce the frequency distortion of the output signal, the local oscillator is controlled, its control inputs are connected to the corresponding outputs of the shift register, and the synchronization input connected to the first output of the synchronizer. ‘Source of information taken into account during the examination: 1. US patent No. 3621450, CL. 331-10, 1971 (prototype).