Evaluation circuit for an optoelectronic detector and method for recording fluorescence events
First Claim
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1. An evaluation circuit for evaluating the electric signals of an optoelectronic detector, comprising:
- an analog-to-digital converter comprising;
an input configured to connect to an output of the detector;
an output configured to output a digital value;
a shift register comprising;
at least one data input;
a clock input;
a plurality of register stages; and
at least one data output;
wherein the output of the analog-to-digital converter is connected to the data input of the shift register and also to the clock input of the shift register, so that the contents of the shift register are shifted by one stage as a result of said digital value differing from zero.
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Abstract
An improved evaluation circuit which allows high sensitivity in an economical manner. For this purpose, a shift register having at least one data input, a clock input, a plurality of register stages and at least one data output is provided, wherein the output of the analog-to-digital converter is connected to the data input of the shift register. With a shift register, fluorescent light and scattered light can be temporally distinguished in an economical manner.
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13 Claims
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1. An evaluation circuit for evaluating the electric signals of an optoelectronic detector, comprising:
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an analog-to-digital converter comprising; an input configured to connect to an output of the detector; an output configured to output a digital value; a shift register comprising; at least one data input; a clock input; a plurality of register stages; and at least one data output; wherein the output of the analog-to-digital converter is connected to the data input of the shift register and also to the clock input of the shift register, so that the contents of the shift register are shifted by one stage as a result of said digital value differing from zero. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for recording fluorescence events by means of an optoelectronic detector, comprising:
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radiating light pulses onto a sample by means of a light source; capturing light from the sample by means of the optoelectronic detector; converting the captured light into an electric signal and feeding the electric signal to an analog-to-digital converter to generate a digital value; outputting the digital value from the analog-to-digital converter; and storing the outputted digital value in an input stage of a shift register; wherein the method farther comprises at least one further step selected from the group consisting of; summing digital values which are stored in the shift register before a marking value; and summing digital values which are stored in the shift register after a marking value. - View Dependent Claims (12, 13)
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Specification