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Control circuit and terminal

A control circuit and control node technology, which is applied to transducer circuits, amplifier protection circuit layout, electrical components, etc., can solve the problem of less available space in the position of the earpiece, avoid adverse effects, reduce costs, and simplify the drive circuit structure. Effect

Active Publication Date: 2022-03-15
HONOR DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the screen-to-body ratio increases, less and less real estate is available at the earpiece position

Method used

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Embodiment Construction

[0025] The terms used in the embodiments of the present application are only used to explain specific embodiments of the present application, and are not intended to limit the present application.

[0026] Terminals such as mobile phones are equipped with speakers and earpieces. The speaker is a speaker for external sound, which is usually driven by a power amplifier. The earpiece is a speaker for close to the ear, and is usually driven by a codec (Coder-Decoder, CODEC). . In order to simplify the structure, a power amplifier can be used to drive the earpiece and the speaker, so that the CODEC can be saved, which requires a switch to switch, that is, the drive end of the power amplifier is connected to the earpiece when the earpiece is sounding, and the power amplifier is connected when the speaker is sounding. The drive end is connected to the horn. The drive of the speaker requires high voltage and high current, and the switch for switching needs to use a switching device t...

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PUM

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Abstract

The embodiment of the invention provides a control circuit and a terminal, relates to the technical field of electronic equipment, simplifies a circuit structure, and realizes the purpose of driving a receiver in a limited space. The control circuit comprises a power amplifier, a loudspeaker and a receiver; the first differential signal driving end is connected to the first differential signal horn end through a first branch, the second differential signal horn end is connected to the second differential signal driving end through a second branch, a first MOSFET and a second MOSFET which are connected in series are arranged on the first path, and the directions of parasitic diodes of the first MOSFET and the second MOSFET are opposite on the first path; the first differential signal driving end is connected to the first differential signal receiver end through a third branch, the second differential signal receiver end is connected to the second differential signal driving end through a fourth branch, a third MOSFET and a fourth MOSFET which are connected in series are arranged on the second path, and the directions of parasitic diodes of the third MOSFET and the fourth MOSFET are opposite on the second path.

Description

technical field [0001] The present application relates to the technical field of electronic equipment, in particular to a control circuit and a terminal. Background technique [0002] A handset is provided in a terminal such as a mobile phone. The earpiece is a speaker used close to the ear, and is usually driven by a codec (Coder-Decoder, CODEC). The earpiece is usually located on the front of the display next to the ear. However, as the screen-to-body ratio increases, there is less and less space available at the earpiece location. Therefore, how to drive the handset in a limited space becomes a problem to be solved. Contents of the invention [0003] The technical solution of the present application provides a control circuit and a terminal, which simplifies the circuit structure and realizes driving the receiver in a limited space. [0004] In the first aspect, the technical solution of the present application provides a control circuit, including: a power amplifie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/185H03F3/24H03F3/217H03F3/45H03F1/52H04R3/00
CPCH03F3/185H03F3/245H03F3/45179H03F1/523H04R3/00H04R2499/11
Inventor 黄停朱辰
Owner HONOR DEVICE CO LTD
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