US Patent Issued on March 18 for "Temperature compensating adjustable ultraviolet lamp driver circuit and photoionization detector employing the driver circuit" (Minnesota Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,255,583, issued on March 18.

"Temperature compensating adjustable ultraviolet lamp driver circuit and photoionization detector employing the driver circuit" was invented by Charles Willcox (Hopkins, Minn.), David Jennings (Edina, Minn.) and Christopher Fields (Coon Rapids, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A photoionization detector sensor equipped with a temperature compensating and output adjustable ultraviolet lamp driver for supplying an alternating current signal to the ultraviolet lamp effective to light the ultraviolet lamp with direct current supplied from both a first variable voltage supply circuit and a second temperature ...