Methods and materials for detecting light released from a...

Details Methods and materials for detecting light released from a... Methods and materials for detecting light released from a...

2009-01-14

2011-10-18

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S205000

Reexamination Certificate

active

08039783

ABSTRACT:
The present disclosure relates generally to methods and materials for detecting light released from a labeling material using self triggering excitation. In particular, the present disclosure provides an architecture for a detection system that detects accumulated phase shifts in the form of a ring-oscillator frequency. The present disclosure provides devices for detection of a light released by a labeling material, the device comprising: a start-up circuit that provides power to a pulse generator block that drives an LED driver, a photodetector that detects the light released by a labeling material and provides a first signal; a variable reference that provides a second signal; a slicer for comparing the first signal to the second signal, wherein the slicer generates an output signal with a delay that triggers the pulse generator block after the start-up circuit is disabled; a frequency reference; and a frequency counter for comparing the output from the slicer to the frequency reference thereby producing a output signal.

REFERENCES:
patent: 5212386 (1993-05-01), Gratton et al.
patent: 2006/0214091 (2006-09-01), Richter et al.
patent: 2010/0285599 (2010-11-01), Schliesser et al.

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