A digital amplifier comprises: a switching unit that amplifies a signal input to the digital amplifier by performing a switching operation; a driving unit that turns the switching unit on and off; an input signal detection unit that detects an input signal to the digital amplifier; and a first control unit that performs control such that the switching unit starts a switching operation by starting driving of the driving unit, when the digital amplifier is changed to a signal input state and the input signal detection unit detects an input signal, and performs control such that the switching unit stops the switching operation by stopping the driving of the driving unit, when the digital amplifier is changed to a no signal input state and the input signal detection unit does not detect an input signal. This configuration enables to reduce power consumption when no signal is input.

Claims

4 · 1 independent · depth 2

4 granted claims

›1.independentA digital amplifier which amplifies a signal, comprising:na switching unit that amplifies a signal input to the digital amplifier by performing a swit…+3

›2.↳ 1The digital amplifier according to claim 1, wherein an order of the feedback unit is variable, andnwherein the feedback aspect changing unit performs …d2

›3.↳ 1The digital amplifier according to claim 1, wherein the modulation units are a plurality of kinds of modulation units that are provided in parallel to…d2

›4.↳ 1The digital amplifier according to claim 1, wherein the modulation units are a plurality of kinds of modulation units that are provided in parallel to…d2

Classifications

4 codes

IPC · International Patent Classification

Section H — Electricity

H03F3/38
H03F3/217

USPC · US Patent Classification

330/10330/251

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Pendency

3.9 y

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Examiner

Khanh V Nguyen

art unit 2843 · TC 2800

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20130021096 A1	24 Jan 2013

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