Is a
Patent attributes
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
August 24, 2021
Patent Application Number
20191219
Date Filed
December 19, 2019
Patent Citations Received
Patent abstract
An amplifying device includes a self-excited class D amplifier circuit and a band elimination filter. The self-excited class D amplifier circuit includes a modulation circuit that is configured to apply self-oscillating pulse modulation to an audio signal. The modulation circuit is configured to receive, from a signal generation circuit, a supply of a synchronizing signal with which the self-oscillation synchronizes. The band elimination filter is configured to reduce components that belong to a frequency band including a frequency of the synchronizing signal, in an output signal from the self-excited class D amplifier circuit.
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