Scheduled System Maintenance:
On Monday, April 27th, IEEE Xplore will undergo scheduled maintenance from 1:00 PM - 3:00 PM ET (17:00 - 19:00 UTC). No interruption in service is anticipated.
By Topic

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

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

6 Author(s)

This paper presents an integrated circuit for audiometric applications, which includes a linearly controlled exponential attenuator with 147 dB of dynamic range and a power amplifier capable of driving 8 Vpp on a 7-Ω resistive load. The required attenuation is achieved in the current domain by exploiting the exponential transfer characteristic of bipolar transistors. In order to achieve a temperature-independent attenuation, in spite of the temperature-dependent bipolar transistor IC-VBE relationship, we produce on-chip an attenuation control voltage proportional to the absolute temperature. The 24-mm2 chip, fabricated in a 2-μm high-voltage CMOS process, achieves the required dynamic range with 80 dB of spurious-free dynamic range (excluding harmonics) and -57 dB of total harmonic distortion, consuming 33 mA from a ±5-V power supply

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:36 ,  Issue: 7 )