Dergi makalesi Açık Erişim
Abbas, Shahbaz; Ceylan, Omer; Gurbuz, Yasar
This paper presents a digital readout integrated circuit (DROIC) for small pitch medium-wave infrared (MWIR) starring focal plane arrays (FPAs). To overcome the limited in-pixel resolution of such DROICs, the concept of error shaping is introduced in pulse frequency modulation (PFM)-based pixels. Multiple integration operations are performed in a single frame and the residue charge from each integration phase is retained and injected into the next charge packet. This over-integration routine provides a high pass noise transfer function (NTF) equivalent to what is obtained in a first order sigma delta modulator. The concise structure of a PFM analog-to-digital converter (ADC) lends itself well to such an operation inside the pixel, while consuming low power. Along with a theoretical analysis of the technique, a prototype based on a 16 x 16 array and sinc decimation filters is developed to demonstrate the performance of the proposed DROIC. With an in-pixel resolution of 5 bits and over-integration ratio (OIR) of 128, 395 noise electrons are demonstrated at full-well fill from the test array fabricated in a 90 nm bulk-CMOS process.
Dosya adı | Boyutu | |
---|---|---|
bib-fd8bde65-b3a5-44b0-8987-5c2171ad0c7e.txt
md5:248f484ba0ab96bd8f37693c74c7a12e |
193 Bytes | İndir |
Görüntülenme | 32 |
İndirme | 6 |
Veri hacmi | 1.2 kB |
Tekil görüntülenme | 31 |
Tekil indirme | 6 |