Multi-Level Balanced Isolated Floating Difference Amplifier

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.

[1]  Gaetano Palumbo,et al.  Charge pump circuits with only capacitive loads: optimized design , 2006, IEEE Transactions on Circuits and Systems II: Express Briefs.

[2]  F. Moraveji A tiny, high-speed, wide-band, voltage-feedback amplifier stable with all capacitive load , 1996 .

[3]  J. B. Kuo,et al.  A 1.5-V full-swing bootstrapped CMOS large capacitive-load driver circuit suitable for low-voltage CMOS VLSI , 1997 .

[4]  K. Furutani,et al.  Performance of driving method of piezoelectric actuator by using current pulse , 2006, 9th IEEE International Workshop on Advanced Motion Control, 2006..

[5]  P. K. Chan,et al.  Gain-enhanced feedforward path compensation technique for pole-zero cancellation at heavy capacitive loads , 2003 .

[6]  Aria Nosratinia,et al.  HIGH-DRIVE CMOS BUFFER FOR LARGE CAPACITIVE LOADS , 1991 .

[7]  Yi-Cheng Huang,et al.  Application of a novel battery charger system to new developed piezoelectric actuator for high speed micropositioning motion , 2000, 2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353).

[8]  Josef A. Nossek,et al.  Low-power DA-converters for display applications using stepwise charging and charge recovery , 2004, 2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512).

[9]  W. Steinhagen,et al.  An adaptive biasing one-stage CMOS operational amplifier for driving high capacitive loads , 1991 .

[10]  Gi Sang Choi,et al.  A study on position control of piezoelectric actuators , 1997, ISIE '97 Proceeding of the IEEE International Symposium on Industrial Electronics.

[11]  Andrew J. Fleming,et al.  Precision current and charge amplifiers for driving highly capacitive piezoelectric loads , 2003 .

[12]  Ka Nang Leung,et al.  Three-stage large capacitive load amplifier with damping-factor-control frequency compensation , 2000, IEEE Journal of Solid-State Circuits.

[13]  S. O. Reza Moheimani,et al.  Improved current and charge amplifiers for driving piezoelectric loads , 2003, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.