Title :
High-speed front end for LED-Photodiode based fluorescence lifetime measurement system
Author :
Joseph, Clement ; Boukadoum, Mounir ; Charlson, Joe ; Starikov, David ; Bensaoula, Abdelhak
Author_Institution :
Center for Adv. Mater., Houston Univ., TX
Abstract :
An optoelectronic front end for a high-speed solid-state based time-domain fluorescence measurement system is investigated. It consists of a source light emitting diode (LED) and photodetector (PD) pair connected to an original transimpedance amplifier. The amount of light reaching the detector from the fluorescence and the effect of different noise sources on the proposed system are evaluated. The simulation results show that a bandwidth greater than 80MHz could be reached for PD currents with amplitudes as low as 20nA. An actual circuit was built to confirm the projected capabilities of the system.
Keywords :
amplifiers; fluorescence; light emitting diodes; photodetectors; photodiodes; LED-photodiode; fluorescence lifetime measurement; high-speed front end; high-speed solid-state; light emitting diode; optoelectronic front end; photodetector; time-domain fluorescence measurement; transimpedance amplifier; Bandwidth; Circuit noise; Fluorescence; Lifetime estimation; Light emitting diodes; Light sources; Multiaccess communication; Photodetectors; Radiofrequency amplifiers; Solid state circuits;
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
DOI :
10.1109/ISCAS.2007.378456
