DA converter
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United States of America Patent
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Mar 31, 2015
Grant Date -
Aug 22, 2013
app pub date -
Feb 12, 2013
filing date -
Feb 22, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
There is provided A DA converter in which the N current switch cells each include: a current source having one end connected to a first power source; and first and second switch transistors differentially operating each other, each having a control terminal receiving a digital signal, the first combining node combines a current output from the first switch transistor in each current switch cell, the second combining node combines a current output from the second switch transistor in each current switch cell, the first output impedance element has ends connected to the first combining node and a second power source, the second output impedance element has ends connected to the second combining node and the second power source, the controller controls the current source in each current switch cell to reduce variation in amount of a current flowing from the first power source.
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