DA converter and wireless communication apparatus

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United States of America Patent

PATENT NO 8849219
APP PUB NO 20130252559A1
SERIAL NO

13599413

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Abstract

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In general, according to one embodiment, a DA converter configured to convert a digital signal comprising n (n>1) bits to an analog current to output the analog current from an output terminal, includes n voltage-current converters. Each of them corresponds to each bit of the digital signal and is configured to generate a current depending on the corresponding bit. A k-th (k is an integer of 0 to n−1) voltage-current converter includes a first transistor whose threshold voltage is adjustable. The first transistor includes a semiconductor substrate, a first diffusion region, a second diffusion region, an insulating film, a charge accumulating film, and a gate.

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Patent Owner(s)

  • LEVEL 3 COMMUNICATIONS, LLC;TOSHIBA MEMORY CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Deguchi, Jun Kawasaki, JP 65 426
Hagiwara, Yousuke Kawasaki, JP 14 33
Kinoshita, Atsuhiro Kamakura, JP 100 2186
Kousai, Shouhei Yokohama, JP 42 205
Marukame, Takao Yokohama, JP 84 624
Suzuki, Masamichi Tokyo, JP 62 537

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