Electronic device and telephone switchboard

A technology for electronic devices and telephones, which is applied to current supply devices, telephone communication, selection devices, etc., can solve the problem that the power supply circuit cannot be provided, and achieve the effect of low power consumption

Inactive Publication Date: 2013-01-30
FU TAI HUA IND SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, in order to solve the technical problem that the power supply circuit in the telephone exchange in the prior art cannot flexibly provide suitable

Method used

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  • Electronic device and telephone switchboard
  • Electronic device and telephone switchboard
  • Electronic device and telephone switchboard

Examples

Experimental program
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Embodiment Construction

[0058] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0059] see figure 1 , which is a block diagram of a power supply circuit in an electronic device according to an embodiment of the present invention. In this embodiment, the electronic device 10 is described by taking a telephone exchange as an example. Among them, the telephone exchange is a processing mechanism that centrally distributes and controls the incoming calls and outgoing calls of multiple telephone sets, and provides working voltage for the transmission of signals in the telephone sets.

[0060] The electronic device 10 includes a power unit 100 , at least one control unit 200 and one or more load circuits 300 . Wherein, the power supply unit 100 is electrically connected to the control unit 200 and the load circuit 300 respectively, and the power supply unit 100 provides the load circuit 300 with electrical signals required fo...

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PUM

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Abstract

The invention relates to an electronic device comprising a power circuit and a control unit. The power circuit comprises a power unit and at least one output unit which are connected. The power unit is used for performing voltage switch on a first electric signal and outputting the electric signal to the output unit. The output unit is used for outputting the switched first electric signal to a load circuit to support the normal working of the load circuit. The resistance values of a resistor of the load circuit are different under different conditions and the control unit outputs the corresponding control signal according to the different conditions of the load circuit. The output unit outputs a feedback signal to the power unit according to the control signal and different conditions of the load circuit. The power unit switches the first electric signal according to the feedback signal, and the control signal is also used for controlling the state of the switched first electric signal which is output by the output unit.

Description

technical field [0001] The invention relates to an electronic device, in particular to a telephone exchange with a power supply circuit. Background technique [0002] The power circuit of the telephone exchange needs to provide different working voltages according to the state of the telephone. For example, when the telephone is in the standby and ringing states, the telephone exchange needs to provide a working voltage to the telephone that is greater than the working voltage when the telephone is in the on-hook state. , and the working voltage required when the phone is in the standby state is not the same as the voltage direction when the phone is in the ringing state. The power supply circuits of current telephone switches all use electronic components such as transformers to provide operating voltages for telephones. However, the power consumption and volume of the current common transformer are large, so the overall power supply circuit cannot adapt to the development...

Claims

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Application Information

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IPC IPC(8): G05B19/042H04Q3/00
CPCG05B19/042H04Q3/00H04M19/001H04M5/02H04M19/00
Inventor 黄仁文张俊伟庄宗仁翁世芳
Owner FU TAI HUA IND SHENZHEN
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