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Muting circuit of navigation equipment

A technology for mute circuits and navigation equipment, which is applied to circuits or fluid pipelines, transportation and packaging, and vehicle components, and can solve problems such as high production costs, unstable audio mute circuits for vehicle navigation, and complex mute processing

Active Publication Date: 2015-12-30
重庆一极科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, the audio mute circuit of the car navigation is relatively unstable, the mute processing is relatively complicated, and its structure is very complicated, resulting in high production costs

Method used

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  • Muting circuit of navigation equipment

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Embodiment Construction

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0017] See figure 1 , figure 1 It is the circuit schematic diagram of the mute circuit of the navigation device of the present invention. The mute circuit of the navigation device in this embodiment includes several triodes, a diode D11, several resistors, and several capacitors. in:

[0018] The base of the triode Q40 is connected to the MCUM_F / PI7 pin of the main control chip of the navigator, and connected to the power supply B5V through a resistor R249,...

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Abstract

The invention discloses a muting circuit of navigation equipment. The mute circuit comprises a plurality of triodes, a diode D11, a plurality of resistors and a plurality of capacitors. A main control chip is controlled through a mute button in a driving cab, and the main control chip is connected with a base electrode and an emitting electrode of the triode Q40 of an audio muting circuit through two signal output pins according to signals of the mute button, and then controls muting of the left pin and the right pin through an audio power amplifier circuit.

Description

technical field [0001] The invention relates to a mute circuit of a navigation device. Background technique [0002] Car dvd navigation is a car host with DVD playback, MP4 / MP3 playback and navigation functions. It is generally used to replace the original car's CD host. If it is a special design for a special car, its power plug and audio cable will be completely plugged into the original car, without changing any wiring of the original car, and the appearance and size are consistent with the original car style. If there is a video input port, it can also be used by installing a reversing camera. In the prior art, the audio muting circuit of the car navigation is relatively unstable, the muting processing is relatively complicated, and its structure is very complicated, resulting in high production cost. Contents of the invention [0003] Aiming at the deficiencies of the prior art above, the technical problem to be solved by the present invention is to provide a mu...

Claims

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Application Information

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IPC IPC(8): B60R16/023
CPCB60R16/0231
Inventor 易春华
Owner 重庆一极科技有限公司