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Improved PONONU voice off-hook circuit

A circuit and voice technology, applied in the direction of coupling substation interface circuit, etc., can solve the problem of burning out of the first triode VQ1 inductance VL2

Inactive Publication Date: 2021-05-18
SHENZHEN FLASHLIGHT EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides an improved PON_ONU voice off-hook circuit, and its purpose is to solve the problem that the first triode VQ1 and the inductor VL2 are burned out in the boost circuit

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  • Improved PONONU voice off-hook circuit
  • Improved PONONU voice off-hook circuit

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Embodiment Construction

[0010] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0011] In this patent application document, if there are expressions like "the first resistance" and "the second resistance", it does not necessarily mean that the "first resistance" must appear before the "second resistance" in this article, and its purpose is only In order to indicate that these are two resistors with different specifications. Sometimes, in order to match the description of the circuit diagram, "the second resistor" may appear b...

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Abstract

The invention discloses an improved PONONU voice off-hook circuit which comprises a power supply circuit, a booster circuit, an energy storage filter circuit and a filter circuit which are connected in sequence. The booster circuit comprises a first triode (VQ1), a third triode (VQ3), an inductor (VL2), a resistor pair formed by connecting a plurality of resistors in parallel, and a diode (VD4); the improved circuit further comprises an acceleration capacitor (VC26), one end of the acceleration capacitor (VC26) is connected between the second resistor (VR35) and the third resistor (VR33), and the other end of the acceleration capacitor (VC26) is connected to the base electrode of the first triode (VQ1). An acceleration capacitor VC26 is additionally arranged between a base electrode of a first triode VQ1 and a pulse switching signal, so that the response time of conduction and cut-off of the first triode VQ1 is shortened, the first triode VQ1 really works in a switching state, and an inductor VL2 works below saturation current.

Description

technical field [0001] The invention belongs to the field of switch tube circuits, and in particular relates to an improved PON_ONU voice off-hook circuit. Background technique [0002] PON is the abbreviation of Passive Optical Network, which refers to the passive optical network; ONU is the abbreviation of OpticalNetwork Unit, which refers to the optical network unit, which is the home network terminal. It is commonly called an optical cat, and PON_ONU means a passive optical network unit. . refer to figure 1 , PON _ONU voice interface, when off-hook or ringing, burn out the switching transistor of the boost circuit. ONU voice boost circuit such as figure 1 , the switch pulse signal controls the conduction and cut-off of the first transistor VQ1 through the second transistor VQ2, and then controls the duty ratio of the output high voltage. When the switching pulse frequency is high, it will cause the first transistor The conduction and cut-off of VQ1 are not complete; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/74
CPCH04M1/74
Inventor 徐浩陈传荣
Owner SHENZHEN FLASHLIGHT EQUIP
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