A digital-to-analog converter and a digital power amplifier subsystem

A digital analog, digital power amplifier technology, applied in the direction of analog/digital conversion, code conversion, transducer circuit, etc., can solve problems such as adverse effects on the performance of digital-to-analog converters

Active Publication Date: 2018-12-14
SHANGHAI AWINIC TECH CO LTD
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Problems solved by technology

[0005] In view of this, the present invention provides a digital-to-analog converter and a digital power amplifier subsystem, to solve the problem that the size of the switching tube in the digital-to-analog converter can only be designed to be small, which affects the performance of the digital-to-analog converter. The problem of adverse effects

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  • A digital-to-analog converter and a digital power amplifier subsystem
  • A digital-to-analog converter and a digital power amplifier subsystem
  • A digital-to-analog converter and a digital power amplifier subsystem

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Embodiment Construction

[0036] 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.

[0037] refer to figure 1 , figure 1 A schematic diagram of an application scenario of a digital power amplifier system of a digital-to-analog converter provided by an embodiment of the present invention, which functions to convert the PWM signal processed by the digital module into an analog signal, including two channels VOP and VON, and the VOP channel is used below The digital power amplifier subsystem is taken as an example for illustration.

[0038] In ...

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Abstract

The invention provides a digital-to-analog converter and a digital power amplifier subsystem, The clock feed-through effect and the channel charge injection phenomenon generated by a first switch, a second switch, a third switch and a fourth switch of the digital-to-analog converter during the switching process are not loaded in the output signal of the digital-to-analog converter by acrossing thefirst current source and the second current source. The invention avoids the adverse effects of clock feed-through effect and channel charge injection phenomenon caused by the first switch, the second switch, the third switch and the fourth switch on the output signal of the digital-to-analog converter in the switching process, so that the sizes of the first switch, second switch, the third switch and the fourth switch are not limited, a larger size switch tube may be used as the first switch, the second switch, the third switch, and the fourth switch to solve the problem that the first current source and the second current source operate in the linear region due to excessive voltage drops consumed by the first switch, the second switch, the third switch, and the fourth switch.

Description

technical field [0001] The present invention relates to the technical field of semiconductor integrated circuits, and more specifically relates to a digital-to-analog converter and a digital power amplifier subsystem. Background technique [0002] The digital power amplifier has the characteristics of low distortion, low noise, large dynamic range, and strong anti-interference ability. Its advantages in sound quality transparency, resolution, background tranquility, and low-frequency shock are greatly superior to traditional analog power amplifiers and class D power amplifiers. With the rapid development of consumer products such as DVD home theater, mini audio system, set-top box, personal computer, LCD TV, flat panel display and mobile phone, especially the emergence of new audio specifications with high sampling frequency such as SACD and DVD Audio, and The evolution of audio system from stereo to multi-channel surround system has accelerated the development of digital po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/74H03F1/30H03F1/32H03F3/185H03F3/21
CPCH03M1/662H03M1/742H03M1/822H04R3/00Y02D30/70
Inventor 杨志飞张海军姚炜周佳宁杜黎明
Owner SHANGHAI AWINIC TECH CO LTD
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