Amplifier core and amplifier
US-2024204733-A1 · Jun 20, 2024 · US
Output coupling capacitor free audio power amplifier dynamically configured for speakers and headphones with excellent click and pop performance
US9054656B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9054656-B2 |
| Application number | US-201313925941-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 25, 2013 |
| Priority date | Oct 25, 2000 |
| Publication date | Jun 9, 2015 |
| Grant date | Jun 9, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
First and second channel bridge amplifiers are dynamically configured to drive either speakers or headphones. The first channel bridge amplifier includes a first amplifier driving one end of a first speaker through a mechanical switch in a headphone-jack, and a second amplifier driving another end of the first speaker. The second channel bridge amplifier includes third and fourth amplifiers driving respective ends of a second speaker. An amplifier control circuit dynamically detects the insertion or removal of a plug in the jack and configures the amplifiers accordingly. When a plug is inserted into the jack, the mechanical switch disconnects the first speaker from the first amplifier, and the fourth amplifier is tri-stated disconnect the second speaker. The first and third amplifiers are configured to drive the first and second channels of the headphones, while the third amplifier drives the headphone common point (shield ring) as a virtual ground connection.
First claim
Opening claim text (preview).
The invention claimed is: 1. An apparatus for monitoring a jack for a plug insertion, the jack having a first terminal driven by a signal and a second terminal that is separably coupled to the first terminal, the second terminal of the jack is decoupled from the first terminal when a plug is inserted into the jack, comprising: a first circuit that couples a supply voltage to the second terminal when the plug is in the jack; a compare circuit that generates a compare signal respo…
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Electricity · mapped topic
- H03F3/45179Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9054656B2 cover?
- First and second channel bridge amplifiers are dynamically configured to drive either speakers or headphones. The first channel bridge amplifier includes a first amplifier driving one end of a first speaker through a mechanical switch in a headphone-jack, and a second amplifier driving another end of the first speaker. The second channel bridge amplifier includes third and fourth amplifiers dri…
- Who is the assignee on this patent?
- Texas Instruments Inc, Nat Semiconductor Corp
- What technology area does this patent fall under?
- Primary CPC classification H03F3/45179. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 09 2015 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).