Abstract
A 500dpi capacitive-type CMOS fingerprint sensor with pixel-level adaptive image enhancement scheme is discussed. A virtually-grounded metal shield effectively suppresses the parasitic capacitances without extra circuits and a configurable diffusion network is used to generate a adaptive local threshold level for pixel-level image enhancement. Capacitve-type CMOS fingerprint sensors have advantages of compact size and low-power consumption compared to optical sensors without any requirement of additional components.
| Original language | English |
|---|---|
| Pages (from-to) | 352-353+473+347 |
| Journal | Digest of Technical Papers - IEEE International Solid-State Circuits Conference |
| Publication status | Published - 2002 |
| Event | 2002 IEEE International Solid-State Circuits Conference - San Francisco, CA, United States Duration: 2002 Feb 3 → 2002 Feb 7 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering