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A Fully Balanced Differential Difference Amplifier (FB-DDA) with Dynamic Resistive Degeneration (DRD) is presented. Thanks to this technique, the tradeoff between noise and distortion proper of classic FB-DDA is overtaken, by means of a “Smooth Transition Controlling Circuit” that guarantees low noise performances for small input levels and low distortion performances for high input levels. The circuit...
This paper presents the design and realization of a gain-programmable microphone audio preamplifier that does not need external input-decoupling capacitors. Three possible preamplifier implementations with on-chip decoupling capacitors have been presented and compared in terms of audio quality performance, power consumption, and silicon area occupation. The chosen solution has been integrated in a...
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