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Supply Rejection Improvement Of An Audio Amplifier By Supply Regulation Of Some Internal Stages

IP.com Disclosure Number: IPCOM000007496D
Publication Date: 2002-Apr-01
Document File: 5 page(s) / 51K

Publishing Venue

The IP.com Prior Art Database

Abstract

In audio applications, the required quality level is always increasing. Among the parameters affecting the quality (especially in applications where the same battery is supplying different circuits) the Supply Rejection Ratio is one of the most important (the other ones are noise and distortion). For mono-supply applications, the negative supply is the ground and we are concerned about the rejection of the positive supply only (PSRR). Current PSRR requirements can reach 90 to 100 dB, which are difficult to attain with prior art and require a new approach to provide this high level of rejection.