Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Derek Bernardon0
Date of Patent
June 27, 2006
0Patent Application Number
110327030
Date Filed
January 10, 2005
0Patent Citations Received
Patent Primary Examiner
Patent abstract
The invention is directed to an amplifier circuit based on the principle of a class D amplifier. To avoid unwanted convolution effects and to improve the power supply rejection ratio, provision is made for the amplitude of the ramp signal used for pulse width modulation to track proportionally the supply voltage for the amplifier circuit. For this purpose, the ramp signal generator has an amplitude control input suitably connected to supply and reference potentials. This ensures a constant duty ratio which is independent of the supply voltage. The present circuit may be used, for example, as a DC/DC converter or as an audio amplifier.
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