title: Note: multiplexed multiple-tau auto- and cross-correlators on a single field programmable gate array.
abstract: We introduce a new multiple-tau hardware correlator design for computing fluorescence correlation functions (CFs) in real time. Use of hardware resources is minimized by scheduling the computation of different segments of the CFs on a single correlator block. Simultaneous calculation of two multiple-tau autocorrelation (ACFs) and two cross-correlation functions (CCFs) is implemented in LabVIEW on a National Instruments field programmable gate array (FPGA) card with a minimal sampling time of 400 ns. Raw data are stored with a time resolution of 50 ns. The design can be easily adapted to other FPGA cards and extended to more inputs.
authors.affiliation: Department of Biophysics and Cell Biology, Medical and Health Science Center, University of Debrecen, Debrecen 4032, Hungary.
authors.forename: G
authors.initials: G
authors.lastname: Mocsár
authors.forename: B
authors.initials: B
authors.lastname: Kreith
authors.forename: J
authors.initials: J
authors.lastname: Buchholz
authors.forename: J W
authors.initials: JW
authors.lastname: Krieger
authors.forename: J
authors.initials: J
authors.lastname: Langowski
authors.forename: G
authors.initials: G
authors.lastname: Vámosi
mesh_terms: D008962:Models, Theoretical; D015203:Reproducibility of Results; D013050:Spectrometry, Fluorescence / Q000295:instrumentation*; D013997:Time Factors