公开(公告)号：US10045721B2

公开(公告)日：2018-08-14

申请号：US15085527

申请日：2016-03-30

Applicant: Intel Corporation

Inventor： Mohammad U. Abbasi ,  Sendill K. Gnanaeswaran ,  Nicholas P. Cowley

IPC: A61B5/1455 ,  H03K5/24 ,  A61B5/00 ,  A61B5/024

Abstract: Systems, apparatuses and methods may provide for a transmit circuit including a light source and a receive circuit including a photodetector and a transimpedance amplifier (TIA) coupled to the photodetector. Additionally, a calibration circuit may be coupled to the transmit circuit and the receive circuit, wherein the calibration circuit includes a current controller to set an operational current of the light source to a minimum value that results in a target output voltage of the receive circuit. In one example, the gain of the TIA remains substantially constant during calibration of the receive circuit.

公开(公告)号：US10568530B2

公开(公告)日：2020-02-25

申请号：US14752881

申请日：2015-06-27

Applicant: Intel Corporation

Inventor： Craig P. Finlinson ,  Mohammad U. Abbasi ,  Nicholas P. Cowley ,  Mark S. Mudd

IPC: A61B5/00 ,  A61B5/024 ,  G01J1/44 ,  G11C27/02

Abstract: Described is an apparatus which comprises: a source to generate a first current having AC and DC components; a current-to-voltage converter to convert the first current or a copy of the first current to a first voltage proportional to a resistance, the first voltage having AC and DC components that correspond to the AC and DC components of the first current; a sample-and-hold circuit to filter the AC component from the first voltage and for providing an output voltage with the DC component; and an amplifier to receive the output voltage.