Title :
A Current-Sensitive Front-End Amplifier for Nano-Biosensors with a 2MHz BW
Author :
Ferrari, Giorgio ; Gozzini, Fabio ; Sampietro, Marco
Author_Institution :
Politecnico di Milano
Abstract :
Active resistors up to 300GOmega operating down to the fA range are implemented in the feedback path of an integrator-differentiator transimpedance amplifier for high-sensitivity current measurements. The system has 4fA/radicHz noise up to 100kHz, a 2MHz bandwidth, and ensures unlimited measuring time even with nA DC input currents
Keywords :
biosensors; differentiating circuits; integrating circuits; nanobiotechnology; operational amplifiers; 2 MHz; current-sensitive front-end amplifier; feedback path; high-sensitivity current measurements; integrator-differentiator transimpedance amplifier; nano-biosensors; Bandwidth; Capacitors; Circuit noise; Leakage current; MOSFETs; Nanobioscience; Noise reduction; Resistors; Switches; Transconductors;
Conference_Titel :
Solid-State Circuits Conference, 2007. ISSCC 2007. Digest of Technical Papers. IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
1-4244-0853-9
Electronic_ISBN :
0193-6530
DOI :
10.1109/ISSCC.2007.373345
