Title :
Multi-Level Balanced Isolated Floating Difference Amplifier
Author :
Tung, Yung-Cheng ; Jeng, Shyr-Long ; Chieng, Wei-Hua
Author_Institution :
Dept. of Mech. Eng., Nat. Chiao-Tung Univ., Hsinchu
Abstract :
An innovative amplifier is proposed for applications involving high capacitive load and large voltage output swing, such as piezoelectric (PZT) actuator drivers. This amplifier is configured in a multi-level arrangement with floating amplifiers, yielding a high voltage gain as a sum of all individual gains from its operational amplifiers. The merits of such an amplifier also include a wide bandwidth and high potential power. Experiments using a six-level arrangement demonstrate a 100 kHz bandwidth with plusmn200 V output swing for different capacitive loadings.
Keywords :
differential amplifiers; operational amplifiers; wideband amplifiers; PZT actuator driver; amplifier configuration; bandwidth 100 kHz; capacitive loading; multilevel balanced isolated floating difference amplifier; operational amplifiers; piezoelectric actuator driver; six-level arrangement; voltage output swing; Floating power supplies; Piezoelectric (PZT) actuator,; floating power supplies; piezoelectric (PZT) actuator;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2008.923283
