Multi-stream sensor front ends for noninvasive measurement of blood constituents

US8630691B2 · kind B2 · utility

Assignee

• Cercacor Laboratories, Inc. · US

Inventors

• Marcelo Lamego · Cupertino, US
• Sean Merritt · Lake Forest, US
• Cristiano Dalvi · Irvine, US
• Hung Vo · Garden Grove, US
• Johannes Bruinsma · Opeinde, NL
• Jeroen Poeze · Mission Viejo, US
• Ferdyan Lesmana · Irvine, US
• Massi Joe E. Kiani · Laguna Niguel, US

Key dates

• Filing date: Aug 3, 2009
• Grant date: Jan 14, 2014
• Expiry date: Apr 10, 2032

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2562/146
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The present disclosure relates to an interface for a noninvasive glucose sensor that comprises a front-end adapted to receive an input signals from optical detectors and provide corresponding digital signals. In one embodiment, the front-end comprises switched capacitor circuits that are capable of handling multiple streams signals from the optical detectors. In another embodiment, the front-end comprises transimpedance amplifiers that are capable of handling multiple streams of input signals. In this embodiment, the transimpedance amplifier may be configured based on its own characteristics, such as its impedance, the impedance of the photodiodes to which it is coupled, and the number of photodiodes to which it is coupled.