REGIONAL OXIMETRY ANALOG FRONT END
First Claim
Patent Images
1. An apparatus comprising:
- a first amplifier having a first input coupled to a first optical detector and having a first output corresponding to a logarithm of the first input;
a second amplifier having a second input coupled to a second optical detector and having a second output corresponding to a logarithm of the second input; and
a differential amplifier having a differential output, the differential amplifier configured to amplify a difference between the first output and the second output and generate an output signal, the output signal provided at the differential output.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus includes a first amplifier having a first input coupled to a first optical detector. The first amplifier includes a first output corresponding to a logarithm of the first input. The apparatus includes a second amplifier having a second input coupled to a second optical detector and having a second output corresponding to a logarithm of the second input. The apparatus includes a differential amplifier configured to amplify a difference between the first output and the second output.
19 Citations
31 Claims
-
1. An apparatus comprising:
-
a first amplifier having a first input coupled to a first optical detector and having a first output corresponding to a logarithm of the first input; a second amplifier having a second input coupled to a second optical detector and having a second output corresponding to a logarithm of the second input; and a differential amplifier having a differential output, the differential amplifier configured to amplify a difference between the first output and the second output and generate an output signal, the output signal provided at the differential output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method comprising:
-
receiving a first signal from a first optical detector, the first signal corresponding to a first optical parameter for a tissue; receiving a second signal from a second optical detector, the second signal corresponding to a second optical parameter for the tissue; generating a first amplified output corresponding to a logarithm of the first signal; generating a second amplified output corresponding to a logarithm of the second signal; and generating a differential output using the first amplified output and the second amplified output. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
-
25. A system comprising:
-
a first optical detector configured to provide a first signal corresponding to a first optical property of a tissue; a second optical detector configured to provide a second signal corresponding to a second optical property of the tissue; a first amplifier to generate a first output corresponding to a logarithm of the first signal; a second amplifier to generate a second output corresponding to a logarithm of the second signal; a differential amplifier configured to generate a differential output corresponding to the first output and the second output; and a display configured to provide a visible indication corresponding to the differential output. - View Dependent Claims (26, 27, 28, 29, 30, 31)
-
Specification