Voltage protection circuits and terminal equipment
A voltage protection and circuit technology, which is applied in the field of electronic circuits, can solve problems such as high cost and complex circuits, and achieve the effect of simplifying voltage detection circuits and reducing costs
Active Publication Date: 2018-12-04
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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Problems solved by technology
In the related art, different voltage detection circuits are used for the single-ended output and differential output of the audio power amplifier respectively. However, this circuit design will cause problems such as complicated circuit and high cost.
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[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0035] A voltage protection circuit and a terminal device according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
[0036] figure 1 is a schematic structural diagram of a voltage protection circuit according to an embodiment of the present invention. Such as figure 1 As shown, the voltage protection circuit 10 may include: a sampling network 100 , a switching device 200 and a control network 300 . Among them, such as figure 1As shown, the first input end of the ...
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The present invention discloses a voltage protection circuit and a terminal device. The voltage protection circuit comprises a sampling network, a switch device and a control network. The first input end of the sampling network is connected with the positive output end of a circuit to be detected, the second input end of the sampling network is connected with the negative output end of the circuit to be detected and one end of the switch device, and the output end of the sampling network is connected with the input end of the control network; the other end of the switch device is connected to the ground, and the control end of the switch device is connected with the first output end of the control network; and the control network is configured to control the work state of the switch device according to the output state of the circuit to be detected. The voltage detection circuits of single-end output and difference output of a circuit to be detected of the voltage protection circuit become one so as to simplify the voltage detection circuit and reduce the cost.
Description
technical field [0001] The invention relates to the field of electronic circuits, in particular to a voltage protection circuit and terminal equipment with the voltage protection circuit. Background technique [0002] At present, the output of audio power amplifiers mainly has two modes: single-ended output and differential output. In these two modes, the DC output voltage should not be too high, otherwise it will damage the back-end electronic devices. In the related art, different voltage detection circuits are respectively used for the single-ended output and differential output of the audio power amplifier. However, this circuit design will cause problems such as complicated circuit and high cost. Contents of the invention [0003] The object of the present invention is to solve one of the above-mentioned technical problems at least to a certain extent. [0004] Therefore, the first object of the present invention is to provide a voltage protection circuit. The volta...
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IPC IPC(8): H02H3/20
CPCH02H3/20
Inventor 杨冬笋
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD