Kenji Sameshima

Powder LSI: an ultra small RF identification chip for individual recognition applications

A powder-like 0.09 mm/sup 2/ 2.45 GHz RF identification chip for wireless recognition applications is described. This chip is fabricated in a 0.18 /spl mu/m CMOS process, and its thickness is 60 /spl mu/m. A two-surface connection technique is adopted to facilitate antenna attachment. The distance between the chip and a reader is 300 mm for a reader power of 300 mW.

Excess Noise in Amorphous Selenium Avalanche Photodiodes

Excess noise in amorphous Selenium avalanche photodiodes (a-Se APD) has been measured in a frequency range from 3 kHz to 30 kHz. The deduced excess noise factors, including dependences on photocurrent, frequency, applied electric field and the a-Se layers thickness, agreed with McIntyres theoretical values.

Ultrahigh-sensitivity new super-HARP camera

NHK led the world in developing a high-sensitivity Super-HARP pickup tube using the avalanche multiplication effect. The authors have now developed an improved version (2/3- inch, with electromagnetic focusing and electromagnetic deflection) which is eight times more sensitive and has much better lag characteristics. The handy New Super-HARP color camera which uses this newly-developed pickup tube has higher sensitivity than human vision (2000 lux, F/110 equivalent), negligible low lag, and a limiting resolution of over 700 TV lines. It will be a powerful tool in emergency news gathering at night, the production of scientific programs, and other applications.