Abstract
Hiroki Morimura , Member , IEEE, Satoshi Shigematsu , Member , IEEE,
Mamoru Nakanishi, Member , IEEE, and Katsuyuki Machida , Member , IEEE
Abstract—This paper describes a new capacitive-sensing circuit
technique that improves the quality of images captured with ca-
pacitive fingerprint sensor LSIs. The quality of the captured image
depends on the surface condition of the finger. When the finger is
dry, the electrical resistance of the finger surface is high. The finger
surface resistance induces a