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Integrated circuit and mobile terminal comprising same

An integrated circuit and output technology, applied in the field of mobile terminals, can solve problems such as unacceptability, increase the bill of materials, and increase the difficulty of design, and achieve the effect of avoiding use, improving equivalent impedance, and improving signal processing performance.

Pending Publication Date: 2019-09-24
JLQ TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase of the DC blocking capacitor will bring the following problems: (1) increase the quantity and cost of the bill of materials (Bill of Material, BOM); (2) increase the layout area of ​​the printed circuit board (PCB) and the electronic Design automation (Electronic design automation, EDA) routing complexity, which increases the difficulty of design; (3) capacitance mismatch, commonly used X5R type 100nF capacitor capacitance accuracy is generally ± 10%, for the use of differential input As far as the amplifier is concerned, the two capacitors may produce a mismatch of ±20%, which will increase the total harmonic distortion plus noise (TotalHarmonic Distortion+Noise, THD+N), affecting the audio performance
in satisfying f -3dB Under the condition of <20Hz, the equivalent input impedance of the amplifier needs to be above 4G ohms. To realize such an order of magnitude resistance on a 155mm process chip needs to occupy an area of ​​about 4mm*4mm, which is unacceptable in actual chip design.

Method used

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  • Integrated circuit and mobile terminal comprising same
  • Integrated circuit and mobile terminal comprising same
  • Integrated circuit and mobile terminal comprising same

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Embodiment Construction

[0030] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.

[0032] As indicated in this application and claims, the terms "a", "an", "an" and / or "the" do not refer to the singular and may include the plural unless the context clearly indicates an exception. Generally speaking, the terms "comprising" and "comprising" only suggest the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also contain other st...

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Abstract

The invention provides an integrated circuit which comprises a first blocking capacitor, an amplifier and a high-pass filter, the high-pass filter is formed by connecting a second blocking capacitor and a switch resistor in parallel, and the switch resistor is formed by connecting a switch and a resistor in series, wherein one end of the first blocking capacitor is connected with the signal input end of the integrated circuit, the other end of the first blocking capacitor is connected with the negative input end of the amplifier, the output end of the amplifier serves as the signal output end of the integrated circuit, and the high-pass filter is connected with the input end and the output end of the amplifier.

Description

technical field [0001] The present invention mainly relates to the field of integrated circuits, in particular to an integrated circuit and a mobile terminal including the integrated circuit. Background technique [0002] Consumer electronic products have been widely used in daily life, where the input processing of audio signals (such as calls or recordings) and the conversion of voice into digital signals that can be processed by electronic products require the use of amplifiers. [0003] The processing effect of audio signals, such as the voice quality of calls, the voice recognition rate of smart speakers or AI products, and the sound effects of voice recorders, are important factors for consumers to choose products. In order to improve voice quality, such as noise suppression during calls, and far-field sound pickup by smart speakers, multiple microphones are usually used, and then software algorithms are used to enhance the acoustic processing effect. For example, a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/56H03F3/187H03F3/45H03G3/30
CPCH03F1/56H03F3/187H03F3/45928H03G3/3005
Inventor 高细见
Owner JLQ TECH CO LTD
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