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Current detector with variable outputting level

A current detector and current detection technology, applied in the direction of measuring current/voltage, instruments, measuring devices, etc., can solve problems such as failure to meet requirements

Active Publication Date: 2008-09-24
WISTRON NEWEB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the high level output of the traditional active antenna current detection circuit is greater than the high level of the logic circuit, which cannot meet the requirements

Method used

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  • Current detector with variable outputting level
  • Current detector with variable outputting level
  • Current detector with variable outputting level

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] FIG. 3 shows a current detection circuit according to an embodiment of the present invention. The antenna supply voltage V_ANT and the ground supply the voltage required by the operational amplifier 302 . A current detection point adjustment circuit 306 is coupled to the inverting input terminal of the operational amplifier 302 and the antenna supply voltage V_ANT. One terminal 304B of a current load circuit 304 is coupled to the antenna supply voltage V_ANT, and the other terminal 304A is coupled to the non-inverting input terminal of the operational amplifier 302, and the terminal 304A is also a load contact, that is, the active antenna 308 can be selectively connected to 304A point for the current detector 30 to detect. The output of the operational amplifier 302 is coupled to a clamping circuit 310, and the clamping circuit 310 is supplied with a voltage Vc by a logic circuit and a required voltage by a ground line. The clamping circuit 310 can adjust the output l...

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Abstract

The invention discloses a current detector; it includes operational amplifier, current monitoring point adjusting circuit, current load circuit and clamper. The operational amplifier has one positive input end, one inverse input end and one output end, linking to an air wire supply voltage and a ground wire. The current monitoring point adjusting circuit has one current monitoring point, and it is coupled to the inverse input end of the said operational amplifier. One end of the current load circuit coupled to the said air wire supply voltage, the other end is coupled to the positive input end of the operational amplifier, the said positive input end is a load connection point. The clamper circuit is coupled to the output end of the said operational amplifier, it can control the output voltage in a range, the output of the clamper circuit is in good logic place while the load connection point is a suspension joint.

Description

technical field [0001] The invention relates to a current detection circuit, in particular to a technology suitable for detecting active antennas in a satellite receiving system. Background technique [0002] Due to the characteristics of broadband, broadcasting, and borderless satellite communication services, the demand for satellite receiving systems in the consumer market has gradually increased recently. When using satellite communication services, components such as satellite antennas, satellite ground receivers, intermediate frequency cables, and demodulators are required. [0003] Figure 1 is a schematic diagram of the structure of a satellite receiver and an active antenna. Generally speaking, the satellite receiver 12 and the active antenna 14 are two items that are installed separately (purchased separately). When the user has not installed the active antenna to the satellite receiver, the satellite receiver must be able to detect it, so as to display and inform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/165
Inventor 黄振家石皇城
Owner WISTRON NEWEB