Class d amplification circuit
US-2024267007-A1 · Aug 8, 2024 · US
Self-oscillating class-D amplifier and self-oscillating frequency control method for self-oscillating class-D amplifier
US9379679B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9379679-B2 |
| Application number | US-201214356148-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 2, 2012 |
| Priority date | Nov 4, 2011 |
| Publication date | Jun 28, 2016 |
| Grant date | Jun 28, 2016 |
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Abstract
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A self-oscillation frequency varying element for varying the self-oscillation frequency of a self-oscillation loop of a self-oscillating class-D amplifier is placed in the self-oscillation loop. Frequency comparison, cycle comparison, or phase comparison is performed between a self-oscillation signal of the self-oscillating class-D amplifier or a signal corresponding to the self-oscillation signal and a reference frequency signal having a prescribed reference frequency. Alternatively, information corresponding to a frequency or a cycle of a self-oscillation signal of the self-oscillating class-D amplifier or a signal corresponding to the self-oscillation signal is compared with information corresponding to a prescribed reference frequency or reference cycle. The self-oscillation frequency varying element is controlled in accordance with a result of the comparison, whereby the frequency of the self-oscillation signal or the signal corresponding to the self-oscillation signal is caused to follow the frequency of the reference frequency signal.
First claim
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The invention claimed is: 1. A self-oscillating class-D amplifier comprising: a self-oscillation frequency varying element which is placed in a self-oscillation loop of the self-oscillating class-D amplifier and varies a self-oscillation frequency of the self-oscillation loop, the self-oscillation loop receiving an input signal; and a frequency control loop which: extracts a self-oscillation signal of the self-oscillating class-D amplifier or a signal corresponding to the self-…
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Electricity · mapped topic
- H03F3/217Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US9379679B2 cover?
- A self-oscillation frequency varying element for varying the self-oscillation frequency of a self-oscillation loop of a self-oscillating class-D amplifier is placed in the self-oscillation loop. Frequency comparison, cycle comparison, or phase comparison is performed between a self-oscillation signal of the self-oscillating class-D amplifier or a signal corresponding to the self-oscillation sig…
- Who is the assignee on this patent?
- Yamaha Corp
- What technology area does this patent fall under?
- Primary CPC classification H03F3/217. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 28 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).