US Patent Issued on Aug. 25 for "Preset control loop for PPG LED driver" (Italian Inventor)

ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,720,658, issued on Aug. 25.

"Preset control loop for PPG LED driver" was invented by Ranieri Guerra (S. Giovanni la Punta, Italy).

According to the abstract* released by the U.S. Patent & Trademark Office: "According to an embodiment, a driver circuit for a light emitter in a photoplethysmography (PPG) system includes a main control loop with an operational amplifier and a transistor configured as a source follower. During a preset control phase, a preset circuit sets the operational amplifier output voltage to a preset level. A switching circuit activates the preset circuit during the preset phase and the main control loop during the main control phase. The preset circuit preconditi...