A wide-bandwidth power amplifier for frequency-selective insulator-based dielectrophoresis

Area of Science:

• Biophysics
• Electrical Engineering
• Parasitology

Background:

• Insulator-based dielectrophoresis (IB-DEP) is crucial for contactless biosystem separation and analysis.
• Conventional amplifiers struggle at MHz frequencies, limiting IB-DEP applications for cell electrophysiology and biomolecular preconcentration.
• Slew rate limitations cause power loss and signal distortion in amplifiers at higher frequencies.

Purpose of the Study:

• To present design principles for a wideband amplifier overcoming MHz frequency limitations in IB-DEP.
• To enable high-frequency manipulation of biological cells and biomolecules.
• To facilitate the analysis of Cryptosporidium parvum oocysts.

Main Methods:

• Design and implementation of a novel wideband amplifier circuit.
• Testing amplifier performance up to 15 MHz.
• Application of the amplifier in IB-DEP for biological sample analysis.

Main Results:

• The developed wideband amplifier exhibits no harmonic distortions up to 15 MHz.
• Parasitic DC offsets were absent in the amplifier output within the tested frequency range.
• The amplifier successfully enabled MHz range dielectrophoresis for biological analysis.

Conclusions:

• The novel wideband amplifier design effectively addresses limitations of conventional amplifiers at MHz frequencies.
• This technology expands the capabilities of insulator-based dielectrophoresis for advanced biosystem analysis.
• The study demonstrates the potential for analyzing cytoplasmic alterations in Cryptosporidium parvum oocysts using MHz IB-DEP.