This paper presents a low-power preamplifier for high fidelity audio codecs. It attains high linearity at low power by using a negative-R stabilized amplifier architecture that employs a negative-R assisted amplifier in a low-frequency path to cancel the non-idealities of a main amplifier. This shows the in-band noise attenuation of amplifiers and the drastic improvement of the linearity. Fabricated in a 65-nm CMOS process,the preamplifier achieves -105.1 dB THD,88.6 dB SNDR,and 89.3 dB DR with 20 dB gain in 20 kHz bandwidth,while consuming only 185 μW from a 1.2 V supply. This results in the highest energy-efficiency FoMSNDR of 168.9 dB among audio preamplifiers.
|Title of host publication||ESSCIRC 2019 - IEEE 45th European Solid State Circuits Conference|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||4|
|Publication status||Published - 2019 Sep|
|Event||45th IEEE European Solid State Circuits Conference, ESSCIRC 2019 - Cracow, Poland|
Duration: 2019 Sep 23 → 2019 Sep 26
|Name||ESSCIRC 2019 - IEEE 45th European Solid State Circuits Conference|
|Conference||45th IEEE European Solid State Circuits Conference, ESSCIRC 2019|
|Period||19/9/23 → 19/9/26|
Bibliographical noteFunding Information:
This work was supported by Samsung Electronics (YSSRC program). The authors would like to thank the Rohde & Schwarz for the support of test instruments.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Hardware and Architecture
- Electrical and Electronic Engineering