Minitype stepper adjustable attenuator

Abstract

The invention relates to a minitype stepping adjustable attenuator comprising a casing, a positioning spring plate, a driveplate, a contact spring plate and a substrate combination, wherein the positioning spring plate, the driveplate, the contact spring plate and the substrate combination are packaged in the containing cavity of the casing; and three leading-out ends on the substrate combinationare extended out of a packaged part. Three groups of contact pins of the contact spring plate fixed on the driveplate respectively contact with printing contact groups on a substrate through the positioning spring plate blocked in a base casing and a mechanical structure device matched with a stepping gear on the driveplate; moreover, the invention achieves the quantitatively stepping outputting effect of attenuation by rotating the constant angle of the driveplate. In addition, the invention transfers a stop bump to the root of a rotating shaft part on the driveplate to shrink the size; and the invention controls the mechanical rotating angle of the driveplate by the stop bump and a stop ring arranged in the casing.

Description

technical field [0001] The invention relates to a passive attenuator, in particular to a micro-step adjustable attenuator. Background technique [0002] At present, the commonly used passive attenuators can generally be divided into two types, one is a fixed attenuator, and the other is a variable attenuator. The reason why passive attenuators are widely and widely used is that compared with active attenuators (active attenuators usually use PIN tubes or ICs), they have low insertion loss, good impedance matching, simple operation, and no external The hardware control circuit or software control program is easier to replace, there is no nonlinear distortion when the signal is large, and the price is lower. [0003] Fixed attenuators have the advantages of clear and intuitive attenuation values ​​and stable values, but an attenuator can only have one definite attenuation value. If it wants to cover all commonly used attenuation values ​​(such as 0-15db), there must be 16 dif...

AI Technical Summary

Problems solved by technology

[0003] Fixed attenuators have the advantages of clear and intuitive attenuation values ​​and stable values, but an attenuator can only have one definite attenuation value. If it wants to cover all commonly used attenuation values ​​(such as 0-15db), there must be 16 different values. Attenuator, which causes inconvenience in production. Sometimes the required attenuation value cannot be found because there are not enough spare parts when the equipment is debugged on site. This is the shortcoming of the fixed attenuator.

[0004] The adjustable attenuator has the advantage of continuously adjusting the attenuation value, but the attenuation value cannot be directly displayed, and the required value must be obtained through calculation with the help of an instrument, and its internal carbon diaphragm is easy to wear after frequent rotation, which may cause The value is unstable, which is the disadvantage of the adjustable attenuator

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