TY - JOUR
T1 - A high bandwidth, high voltage amplifier for driving fast piezoelectric actuator-based nanopositioners used in atomic force microscopes
AU - Otieno, Luke Oduor
AU - Nguyen, Thi Thu
AU - Juma, Oyoo Michael
AU - Nguyen, Thi Ngoc
AU - Lee, Yong Joong
AU - Park, Jae Sung
AU - Lee, Ho
AU - Alunda, Bernard Ouma
N1 - Publisher Copyright:
© 2023, The Korean Physical Society.
PY - 2023/11
Y1 - 2023/11
N2 - Some of the challenges of adapting high-voltage amplifier (HVA) designs and solutions for driving highly capacitive loads such as piezoelectric actuators (PEAs) fast include cost, implementation complexity, management of thermal load, and difficult customization. In this work, we develop an easy to implement HVA with 525 kHz small signal bandwidth, 6 A pp , and 110 V pp HVA using a low-cost high voltage operational amplifier (HV-OPA) and a self-biasing power amplifier (PA). At 100 kHz, the phase lag is about -24 ∘ and the HVA can be configured for use with or without the PA stage to prioritize input tracking and output noise reduction or output stability improvement. When used to drive our custom high-speed atomic force microscope (HS-AFM) Z-scanner during imaging, compared to a conventional commercial HVA, our custom HVA is able to track topographical features at faster scan speeds.
AB - Some of the challenges of adapting high-voltage amplifier (HVA) designs and solutions for driving highly capacitive loads such as piezoelectric actuators (PEAs) fast include cost, implementation complexity, management of thermal load, and difficult customization. In this work, we develop an easy to implement HVA with 525 kHz small signal bandwidth, 6 A pp , and 110 V pp HVA using a low-cost high voltage operational amplifier (HV-OPA) and a self-biasing power amplifier (PA). At 100 kHz, the phase lag is about -24 ∘ and the HVA can be configured for use with or without the PA stage to prioritize input tracking and output noise reduction or output stability improvement. When used to drive our custom high-speed atomic force microscope (HS-AFM) Z-scanner during imaging, compared to a conventional commercial HVA, our custom HVA is able to track topographical features at faster scan speeds.
KW - High voltage amplifier
KW - High-speed atomic force microscope
KW - High-speed atomic force microscope scanners
KW - Piezo drivers
KW - Piezoelectric actuators
UR - http://www.scopus.com/inward/record.url?scp=85169049033&partnerID=8YFLogxK
U2 - 10.1007/s40042-023-00911-w
DO - 10.1007/s40042-023-00911-w
M3 - Article
AN - SCOPUS:85169049033
SN - 0374-4884
VL - 83
SP - 795
EP - 806
JO - Journal of the Korean Physical Society
JF - Journal of the Korean Physical Society
IS - 10
ER -