Title :
A high-speed low-power output buffer amplifier for large-size LCD applications
Author :
Marano, Davide ; Palumbo, Gaetano ; Pennisi, Salvatore
Author_Institution :
DIEES (Dipt. di Ing. Elettr., Elettron. e dei Sist.), Univ. di Catania, Catania, Italy
Abstract :
The present paper addresses an improved low-power high-speed buffer amplifier topology for large-size liquid crystal display applications. The proposed buffer achieves high-speed driving performance while drawing a low quiescent current during static operation. The circuit offers enhanced slewing capabilities with a limited power consumption by exploiting a slew detector which monitors the output voltage of the input differential amplifier and outputs an additional current signal providing slew-rate enhancement at the output stage. Post-layout simulations show that the proposed buffer can drive a 1-nF column line load with 8.5-V/¿s slew-rate and 0.8-¿s settling time, while drawing only 8-¿A static current from a 3-V power supply.
Keywords :
buffer circuits; differential amplifiers; driver circuits; liquid crystal displays; low-power electronics; LCD applications; current 3 muA; high-speed driving performance; input differential amplifier; limited power consumption; liquid crystal display applications; low-power high-speed buffer amplifier topology; output voltage; post-layout simulations; quiescent current; slew detector; slew-rate enhancement; slewing capability; static operation; voltage 3 V; Circuit simulation; Circuit topology; Differential amplifiers; Driver circuits; Energy consumption; Frequency; Liquid crystal displays; Operational amplifiers; Power supplies; Voltage;
Conference_Titel :
Electronics, Circuits, and Systems, 2009. ICECS 2009. 16th IEEE International Conference on
Conference_Location :
Yasmine Hammamet
Print_ISBN :
978-1-4244-5090-9
Electronic_ISBN :
978-1-4244-5091-6
DOI :
10.1109/ICECS.2009.5410957
