A 147 dB dynamic range electronic attenuator for audiometric applications with on-chip 1 W power amplifier

This paper presents an electronic attenuator for audiometric applications, including an on-chip power amplifier which drives 8 V
pp
on a 7Ω resistive load. The 24 mm
²
chip, fabricated in a 2 µm high-voltage CMOS process, achieves 147 dB of dynamic range and 80 dB of signal-to-noise ratio, consuming 33 mA from a ±5 V power supply.