Circuits for long-distance transmission and biometric devices, access control systems

A long-distance transmission and biometric identification technology, applied in the field of access control system circuits, long-distance transmission circuits and biometric identification devices, can solve problems such as poor signal driving ability, and achieve poor driving ability, increase power consumption, and enhance driving strength. Effect

Active Publication Date: 2018-02-13
BEIJING EYECOOL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve technical problems such as poor signal drive capability during long-distance transmission in the prior art, the present invention provides a circuit for long-distance transmission, including:

Method used

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  • Circuits for long-distance transmission and biometric devices, access control systems
  • Circuits for long-distance transmission and biometric devices, access control systems
  • Circuits for long-distance transmission and biometric devices, access control systems

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Embodiment Construction

[0024] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the technical problems, technical solutions and advantages to be solved by the present invention are easier to be understood by those skilled in the art, so as to make the protection scope of the present invention clearer definition.

[0025] On the one hand, an embodiment of the present invention provides a circuit for long-distance transmission, such as figure 2 As shown, it includes a level input terminal, a first resistor, a second resistor, a first switch, a second switch, a third switch and a level output terminal, wherein the level input terminal passes through the first resistor and the first switch The control terminal is connected, the first terminal of the first switch is connected to the power supply through the second resistor, the second terminal of the first switch is grounded, and the first terminal of the first swi...

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Abstract

The invention discloses a circuit for remote transmission and a biological recognition device and access control system.The circuit comprises the electric level input end, a first resistor, a second resistor, a first switch, a second switch, a third switch and the electric level output end; the electric level input end is connected with the control end of the first switch through the first resistor, the first end of the first switch is connected with a power supply through the second resistor, the second end of the first switch is grounded, the first end of the first switch is connected with the control end of the second switch and the control end of the third switch, the first end of the second switch is connected with the first end of the third switch, the first end of the second switch is connected with the electric level output end, the second end of the second switch is grounded, and the second end of the third switch is connected with the power supply.In this way, the problem that transmitted signals generate quality deformation due to the fact that the signal driving capacity of the remote transmission circuit is poor and other problems are solved.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a circuit for long-distance transmission, a biometric identification device, and an access control system circuit. Background technique [0002] Usually electronic access control equipment mainly uses Wiegand signals for data transmission, but the transmission distance of ordinary TTL signals is within the range of meters. For common electronic access control equipment, the distance between the identification control terminal (usually fingerprint, iris and other collection and comparison equipment) and the door lock control terminal (directly controlling the switch of the door lock through the access control controller) is relatively close, and the above technology can meet the needs of daily life. However, in places or fields with extremely high security requirements such as finance and national defense, the door lock control terminal usually needs to be placed in a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G07C9/00
CPCG07C9/00174G07C9/00563G07C2009/00579
Inventor 周涛
Owner BEIJING EYECOOL TECH CO LTD
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