Low-Voltage Low-Power Fully-Integratable Automatic Gain Controls
نویسندگان
چکیده
This paper discusses the design of low-voltage low-power fully-integratable automatic gain controls. Four different AGCs are presented, all consisting of three elementary building blocks: a controlled amplifier, a comparator and a voltage follower. Their design is treated separately. As an example, the final section describes an automatic gain control for hearing instruments. INTRODUCTION Low-voltage low-power circuit techniques are applied in the area of battery-operated systems. Automatic gain controls (AGCs) are widely used in communication systems to modify the dynamic range of a signal. They can be found in e.g. radio receivers and transmitters, audio amplifiers and hearing instruments. controlled amplifier ES
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