US Patent Issued to Nokia Solutions and Networks on Sept. 22 for "Method for varying amplifier gain" (New York Inventors)

ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,744,503, issued on Sept. 22, was assigned to Nokia Solutions and Networks Oy (Espoo, Finland).

"Method for varying amplifier gain" was invented by Lorenzo Iotti (Brooklyn, N.Y.), Mark Ferriss (Tarrytown, N.Y.) and Alexander Rylyakov (Staten Island, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus, e.g., an optical signal receiver, includes a trans-impedance amplifier (TIA) circuit. The TIA circuit includes a variable gain amplifier (VGA) having a tunable tail current source. The TIA circuit is configured to tune the tail current source to stabilize a DC current to a load resistor of the VGA over an operating gain range of the TIA circui...