US 12,276,543 B2
Readout circuits for amplitude modulating sensors
David Alan Mills, Gainesville, FL (US); and William C. Patterson, Gainesville, FL (US)
Assigned to INTERDISCIPLINARY CONSULTING CORPORATION, Gainesville, FL (US)
Filed by Interdisciplinary Consulting Corporation, Gainesville, FL (US)
Filed on Aug. 31, 2022, as Appl. No. 17/900,419.
Claims priority of provisional application 63/388,445, filed on Jul. 12, 2022.
Prior Publication US 2024/0019296 A1, Jan. 18, 2024
Int. Cl. G01J 1/04 (2006.01); G01J 1/42 (2006.01); G01J 1/44 (2006.01)
CPC G01J 1/0437 (2013.01) [G01J 1/4228 (2013.01); G01J 1/44 (2013.01); G01J 2001/4242 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A readout circuit for an amplitude modulating sensor comprising:
a first wavelength light source;
a second wavelength light source;
an optical coupler coupled to receive both a first light signal from the first wavelength light source and a second light signal from the second wavelength light source;
a frequency selector that allows for the first light signal to pass from the optical coupler to the amplitude modulating sensor; and
a detector system coupled to the optical coupler to receive the first light signal and the second light signal after the first light signal is modulated by the amplitude modulating sensor and independently detect the modulated first light signal and the second light signal, wherein the detector system generates electronic signals representing the modulated first light signal and the second light signal and removes a common mode signal of the modulated first light signal and the second light signal, removing common mode noise or attenuation in the modulated first light signal.