Detector Log Video Amplifier

Introduction

A Detector Log Video Amplifier is an amplifying circuit whose output signal amplitude has a logarithmic function relationship with the input signal amplitude. Primarily converting a signal to its logarithmic equivalent involves a non-linear op amp.

The actual Detector Log Video Amplifier always has both linear and logarithmic amplification functions. When the input signal is weak, it is a linear amplifier with a large gain; when the input signal is strong, it becomes a logarithmic amplifier, and the gain increases with the increase of the input signal. decrease.

Type

The basic logarithmic amplifier, also known as the trans linear logarithmic amplifier, is based on the logarithmic characteristics of the bipolar transistor (BJT) to realize the logarithmic transformation of the signal. This kind of logarithmic amplifier can respond to slowly changing input signals. It is characterized by excellent DC accuracy and a very wide dynamic range (up to 180db), but has poor AC characteristics.

Baseband logarithmic amplifier is also called video logarithmic amplifier (although it is rarely used in video display related applications). It overcomes the shortcomings of basic logarithmic amplifier and can respond to rapidly changing inputs. The principle is to adopt a "step-by-step compression" technology, which has good AC characteristics but small dynamic range.

The demodulation logarithmic amplifier is also called the step-by-step detection logarithmic amplifier. It has a piecewise linear approximation property. After the logarithmic cascade is formed, a good logarithmic transfer function can be obtained. It has high logarithmic accuracy in the whole dynamic range. Similar to the baseband logarithmic amplifier, it also uses multiple cascaded linear amplifiers with a large dynamic range.

Application

Detector Log Video Amplifier plays a particularly important role in radar equipment. It can not only ensure a wide dynamic range of the radar receiver, but also limit the clutter interference level output by the receiver to achieve the effect of constant false alarm.

For monopulse radar (see tracking radar), the angular error signal can also be normalized; for moving target display radar, it can also suppress stationary target fluctuations.

Certificate

Packing & Delivery

Our Service

Service standards: We are committed to provide a high quality and responsive service to all clients.

OEM: Available for wave guide series.

Stable quality: implement the whole process of quality control, meticulous and strict inspection!

Reasonable price: Internal cost control, reducing expenses, benefiting customers!

Professional selection: more than 5 years of professional engineer selection, to provide you with alternative models of each factory, system solutions

Fast delivery: adequate stocking, shortened delivery time!

Door to door service: We usually send the parcel by DHL, EMS and TNT etc. The tracking number will be sent to you after delivery. It usually takes 3~5working days to reach from our side to your side, which is very convenient for your business.

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