US 12,256,576 B2
Differential amplifier gated with quantum dots absorbing incident electromagnetic radiation
Cody K. Hayashi, Waipahu, HI (US); Carlos M. Torres, Jr., San Diego, CA (US); Richard C. Ordonez, Mililani, HI (US); Nackieb M. Kamin, Kapolei, HI (US); and David Garmire, Ann Arbor, MI (US)
Assigned to United States of America, as represented by the Secretary of the Navy, Washington, DC (US)
Filed by The United States of America, as represented by the Secretary of the Navy, San Diego, CA (US)
Filed on Oct. 12, 2021, as Appl. No. 17/499,747.
Prior Publication US 2023/0111275 A1, Apr. 13, 2023
Int. Cl. H10F 77/14 (2025.01); H03F 3/08 (2006.01); H03F 3/45 (2006.01); H10F 30/21 (2025.01); H10F 30/26 (2025.01); H10F 30/28 (2025.01)
CPC H10F 77/1433 (2025.01) [H03F 3/08 (2013.01); H03F 3/45071 (2013.01); H10F 30/26 (2025.01); H10F 30/2877 (2025.01); H10F 30/288 (2025.01)] 23 Claims
OG exemplary drawing
 
1. A differential amplifier gated with quantum dots for absorbing an incident electromagnetic radiation, comprising:
an unmatched pair including a first and second plurality of quantum dots for respectively absorbing a first and second spectrum, wherein the unmatched pair has a difference between the first spectrum absorbed by the first quantum dots and the second spectrum absorbed by the second quantum dots; and
a matched pair of a first and second phototransistor each including a channel, the first quantum dots for absorbing the first spectrum from the incident electromagnetic radiation and gating a first current through the channel of the first phototransistor, and the second quantum dots for absorbing the second spectrum from the incident electromagnetic radiation and gating a second current through the channel of the second phototransistor,
wherein the first and second phototransistors are coupled together for generating a differential output from the first and second currents, the differential output corresponding to the difference between the first and second spectrums within the incident electromagnetic radiation.