Differential sensing current-steering analog-to-digital converter
 An analog-to-digital converter utilizes both a successive approximation register and a current steering circuit within a digital-to-analog converter to achieve an improved conversion speed, and improved resolution for a predetermined amount of power. The current steering circuit, which is controlled by the successive approximation register, connects constant current sources to current source loads to produce a differential signal output. By steering current from the differential current source loads to the constant current sources, a signal difference resolves at the output of the digital-to-analog converter faster and with greater resolution. 
Motorola, Inc.
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additional additional inventional
Katsufumi Mathew A. Roger A.
Nakamura Rybicki Whatley