ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,556,435, issued on Feb. 17, was assigned to NEC Corp. (Tokyo).
"Signal modulation apparatus and signal modulation method" was invented by Masaaki Tanio (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A signal modulation apparatus includes: a reference signal generator that generates an analog reference signal by removing at least one harmonic signal component corresponding to at least one higher-order frequency from a triangular wave signal; a modulation signal generator that performs pulse width modulation for comparing the analog reference signal with an analog input signal, thereby to generate an analog modulation signal; a digital signal conve...