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US 12,176,452 B2Granted
Methods of sperm cell sensing utilizing a semiconductor detector and cytometer apparatus
AssigneeABS Global, Inc.
InventorsFrederick Savage, Glenn J. Szejna, Zheng Xia
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Abstract
A cytometer includes an avalanche photodiode, a switching power supply, a filter, and voltage adjustment circuitry. The switching power supply includes a feedback loop. The filter is electrically connected between the switching power supply and the avalanche photodiode. The voltage adjustment circuitry adjusts a voltage on the feedback loop based at least in part on a voltage measured between the filter and the avalanche photodiode.
Claims11
A low-noise cytometer comprising:
- a semiconductor detector;
- a power supply;
- a two-stage feedback network;
- an output filter network;
- and
- a second filter;
- wherein the two-stage feedback network and the output filter network provide a low-signal noise floor.
4 more elements
Dependencies are inferred from the claim text.