US 11,063,565 B2Granted

Audio amplifier assemblies, processes, and methods

AssigneeQsc, LLC

InventorsAnders Lind, Matthew Skogmo

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Abstract

An amplifier having one or more channels where each channel includes a two half bridges (a master and slave sub-channel). The sub-channels can be connected either in parallel or in a full-bridge configuration via internal switches that route signals to a pair of speaker jacks. One switch in the amplifier has a first position that selectively connects the outputs of the master and slave sub-channel to the same input of the speaker load so that the two sub-channels will drive the speaker load in parallel and a second position where the output of the slave sub-channel is connected to another input of the speaker load so that the master sub-channel and the slave sub-channel will drive the speaker load in a Full-bridge configuration. A second switch has a first position that connects a second input of the speaker load to ground or reference potential of the sub-channels when the speaker load is to be driven in parallel and a second position that is a No-connect position that is used when the speaker load is driven in the Full-bridge configuration and a ground potential is not to be connected to the speaker.

Claims18

Dependent claims

An amplifier configured to drive a speaker load, comprising:

a first sub-channel configured to create an amplified version of an input signal with a modulated driving signal;
a second sub-channel configured to create an amplified version of the input signal with the modulated driving signal;
first and second speaker terminals to which a speaker load can be connected, wherein an output of the first sub-channel is connected to the first speaker terminal;
a first switch having a first position and a second position, wherein the first switch is configured to connect an output of the second sub-channel to the first speaker terminal to drive the speaker load in parallel when the first switch is in the first position and to connect the output of the second sub-channel to the second speaker terminal so that the first sub-channel and the second sub-channel can drive the speaker load in a bridge tied load configuration when the first switch is in the second position;
and
a second switch having a first position and a second position, wherein the first position of the second switch is configured to connect a ground of the second sub-channel to the second speaker terminal tat is used when the speaker load is to be driven in parallel, and wherein the second position of the second switch has a no contact positon that is used when the speaker load is to be driven in the bridge tied load configuration.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/283,682Filed 22 Feb 2019 · us provisional application
Priority: 23 Feb 2018
Published: US 2019/0267957 A129 Aug 2019
Granted: 13 Jul 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H03F 3/68
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements: combinations of amplifiers, e.g. multi-channel…
H03F 1/0277
In transistor amplifiers: selecting one or more amplifiers from a plurality of amplifiers
H03F 3/183
Low-frequency amplifiers, e.g. audio preamplifiers: with semiconductor devices only
H03F 3/185
With semiconductor devices only: with field-effect devices

Family

Application62/634,774Us provisional application · filed 23 Feb 2018
US 2019/0267957 A1Pre-grant publication · published 29 Aug 2019
US 11,063,565 B2This patent

From the US filing history. Foreign family members aren’t listed.

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