US Patent Issued to Rockwell Collins on Sept. 30 for "Mixer-first radio receiver circuitry" (Iowa Inventor)

ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,431,928, issued on Sept. 30, was assigned to Rockwell Collins Inc. (Cedar Rapids, Iowa).

"Mixer-first radio receiver circuitry" was invented by David W. Cripe (Mount Vernon, Iowa).

According to the abstract* released by the U.S. Patent & Trademark Office: "The mixer-first topology of receivers do not include low-noise amplifiers (LNA) preceding the mixer. The Mixer-First topology of radio receivers utilizes a direct-conversion quadrature mixer to down convert an RF signal to baseband, where a Hilbert Transform filter is used for sideband selection. When a switching mixer is used, the mixer-first receiver is capable of extremely high dynamic range and linearity. The downfall of the m...