A multi-channel intermediate frequency pulse automatic gain attenuation control circuit

Abstract

The invention discloses an automatic gain reduction control circuit for multi-channel intermediate-frequency pulses. The automatic gain reduction control circuit comprises a microwave receiver and is characterized in that the output ends of the microwave receiver are connected with a plurality of power dividers, each power divider is connected with a delay line and a detection logarithm video amplifier, each delay line is sequentially connected with a first amplifier, an ATC and a second amplifier, the detection logarithm video amplifiers are connected with input ends of the same ATC control circuit, the output ends of the ATC control circuit are connected with the ATCs of the forward paths respectively, and all the second amplifiers are connected with the same intermediate-frequency receiver. Under the complex signal environment and under the condition that the intermediate-frequency receiver gets closer to the radiation source, measurement-unified linear attenuation can be conducted on the multi-channel intermediate-frequency pulse signals, adjustment of the grain control amount can be achieved on the pulse front edges, and the pulses can be controlled by themselves.

Description

technical field [0001] The invention relates to a multi-channel intermediate frequency pulse automatic gain attenuation control circuit. Background technique [0002] In the process of detecting the pulsed radiation source, as the distance to the target gets closer, the signal strength received by the receiving antenna of the receiver is getting bigger and bigger, which often causes the ADC (A / D converter) of the signal processor to overflow, and Normal sampling is not possible, ie the dynamic range of the system is exceeded. [0003] There are many methods commonly used to solve the dynamic range, such as DLVA (Detection Logarithmic Video Amplifier) ​​technology, AGC (Automatic Gain Control) technology, etc. However, DLVA technology is in a linear amplification state when it is small signal, and it will be negative when it is large signal. The signal is compressed, and at this time the noise is still a small signal but is in the state of being amplified, resulting in a cha...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention provides a multi-channel intermediate frequency pulse automatic gain attenuation control circuit, in a complex signal environment, as the intermediate frequency receiver is getting closer to the radiation source, it can perform multi-channel intermediate frequency pulse signal Uniform linear attenuation, and at the same time adjust the gain control amount at the front of the pulse, and realize the control of the current pulse

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