System and methods for dynamic range extension using variable length integration time sampling
First Claim
1. A method for processing signals associated with a sequence analyzer, the method comprising:
- obtaining first and second signals, the first and second signals obtained respectively during first and second time intervals that are temporally proximal to one another and of differing durations;
determining a scaling value and an offset value for one of the first and second signals; and
adjusting the other of the first and second signals by applying the signal offset value and the scaling value to the corresponding signal.
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Accused Products
Abstract
A photo-detector generated signal is measured as a sample set comprising a long signal and a short signal. The short signal is scaled to the value of the long signal if the long signal exceeds a dynamic range associated with the photo detector. In one embodiment, the short signal is obtained during a short time interval that is at the approximate middle of a long time interval such that the short and long intervals share a common median time value. Given such symmetry, an approximately linear signal yields a proportionality parameter between the long and short signals thereby allowing the short signal to be scaled. The proportionality parameter facilitates determination of an integration independent component of the photo detector signal that should be removed from the measured long and short signals before scaling. A plurality of sample sets can also be processed such that each sample set overlaps with its neighboring sample set, thereby increasing the effective number of sample sets.
17 Citations
15 Claims
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1. A method for processing signals associated with a sequence analyzer, the method comprising:
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obtaining first and second signals, the first and second signals obtained respectively during first and second time intervals that are temporally proximal to one another and of differing durations; determining a scaling value and an offset value for one of the first and second signals; and adjusting the other of the first and second signals by applying the signal offset value and the scaling value to the corresponding signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for adjusting a signal generated by a sequence analyzer, the method comprising:
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determining a first signal value and a second signal value wherein the first signal value corresponds to a signal acquired during a first time interval and wherein the second signal value corresponds to a signal acquired during a second time interval, wherein the second signal value is less than the first signal value; determining a proportionality parameter between the first and second signal values; determining a signal offset parameter for the second signal value; and adjusting the second signal value based on the signal offset parameter and the proportionality parameter. - View Dependent Claims (9, 10, 11, 12)
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13. A system for processing signals associated with a sequencing apparatus, comprising:
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a detector that detects a labeled sample signal and transforms said labeled sample signal into an electronic signal; a sampling component configured to acquire one or more sample sets associated with the electronic signal, wherein each sample set comprises a first signal value and a second signal value, the first signal value corresponding to a signal acquired during a first time interval, the second signal value corresponding to a signal acquired during a second time interval that is less than the first time interval; and a processing component configured to determine a proportionality parameter and a signal offset parameter, and determine a signal value representative of the sample set by applying the signal offset parameter and the proportionality parameter to the second signal value. - View Dependent Claims (14, 15)
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Specification