|Traditional inductive pickups, such as those used in electric guitars, feature one or more permanent magnets surrounded by a wire coil. String vibrations cause the electromagnetic field to oscillate and induce a voltage in the stationary coil. The electric signal generated is then carried to a power amplifier and speaker. Unfortunately, the wire coils in the pickup often produce undesired feedback and need to be potted with wax or a polymer. In addition, manufacturing the coils involves winding copper wire, with the diameter of a human hair, around thousands of turns, which makes the process tedious, time consuming, and difficult to produce coils with identical shape and sound.
Researchers at Purdue University have developed a flexible, printed circuit board that emulates the wire coils of a traditional pickup. A conditioning circuit is also in place to ensure that the output signal matches that of a traditional pickup, but with greater sound quality and reliability. By eliminating the coil, the weight of the pickup is reduced and the manufacturing process is greatly simplified.
-Reduces undesirable feedback
-Greatly reduces weight of pickup
-Can be used in a larger range of stringed instruments
-Simplifies and reduces cost of manufacturing process
Sep 9, 2014
Mar 1, 2016
Sep 11, 2013
Purdue Office of Technology Commercialization
The Convergence Center
101 Foundry Drive, Suite 2500
West Lafayette, IN 47906
Phone: (765) 588-3475
Fax: (765) 463-3486