A Low-Power Multi-Tanh OTA with Very Low Harmonic Distortion

• Type: Article in International Conference Proceedings Book
• Date: 2015

Authors

Kianpour, I (Author) Other; Hussain, B (Author) Other; Vítor Grade Tavares (Author) FEUP; Helio Mendonca (Author) FEUP

Conference proceedings International

Title: 2015 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS)

Pages: 645-649

IEEE International Symposium on Circuits and Systems (ISCAS)

Lisbon, PORTUGAL, MAY 24-27, 2015

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 3 Citations

Other information

Authenticus ID: P-00G-VNE

DOI: 10.1109/iscas.2015.7168716

Abstract (EN): This paper presents a wide input range, low-power operational transconductance amplifier (OTA) in weak inversion. The OTA is implemented with tanh-triplets differential pairs, degenerated by a composite configuration to augment the input linear range, thus reducing further the harmonic distortion. Using MATLAB, the mismatch factor (A) of a typical multi-tanh triplet has been optimised for minimum harmonic distortion. The OTA is designed in UMC 0.13um CMOS technology with 1.2V supply. Simulations show that the input range can be extended to 300 mV, while keeping the HD3 below -80 dB. The average power consumption is 13nW, with an open loop-gain of 76 dB and a unity gain frequency of 250 Hz. The low harmonic distortion OTA can find potential applications in low-power and long time constant filters.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5