US Patent Issued to PIXART IMAGING on Jan. 13 for "Phase shifter circuit of optical encoder and operating method thereof" (Malaysian Inventors)

ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,525,960, issued on Jan. 13, was assigned to PIXART IMAGING INC. (Hsin-Chu County, Taiwan).

"Phase shifter circuit of optical encoder and operating method thereof" was invented by Chuang-Shen Voo (Penang, Malaysia), Kuan-Choong Shim (Penang, Malaysia) and Gim-Eng Chew (Penang, Malaysia).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a phase shifter circuit of an optical encoder. The phase shifter circuit receives a first signal, a second signal, a third signal and a fourth signal sequentially having a 90-degree phase shift, and includes a first cascaded resistor string, a second cascaded resistor string, a third cascaded resistor string ...