Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Reexamination Certificate
2005-11-08
2005-11-08
Tokar, Michael (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
C341S156000
Reexamination Certificate
active
06963298
ABSTRACT:
An AD converter which uses no buffer for receiving the input signals or uses the buffer having relaxed requirements concerning the range of input signals and the output impedance. Voltage at the connection points of a resistor ladder in which a plurality of resistor elements are connected in series, are compared with a reference voltage by a plurality of voltage comparators, a first current circuit is provided on the high potential side of the resistor ladder, a second current circuit is provided on the low potential side thereof, and analog input voltages are fed by providing an input terminal at any place of the resistor ladder except both ends thereof.
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Otsuka Masanori
Sano Shinya
Yamakido Kazuo
Yamamoto Etsuji
Hitachi ULSI Systems Co. Ltd.
Mai Lam T.
Miles & Stockbridge P.C.
Renesas Technology Corp.
Tokar Michael
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