Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2005-01-11
2005-01-11
Wamsley, Patrick (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S136000
Reexamination Certificate
active
06842132
ABSTRACT:
Methods and devices for code independent switching in signal processing circuit such as a digital-to-analog converter (DAC) are described, which provide code independent switching activity. A steering cell receives a digital data input signal that is defined at data intervals, and produces multiple representative analog output signals. For each data interval, each analog output signal depends only on the present state of the digital data input signal, independently of any previous state of the digital data input signal. In addition, the signal processing circuit apart from the analog output signals is substantially free of data dependent disturbances.
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“Park S. et al. Digital-to-Analog Converter Based on Differential-Quad Switching”,IEEE Journal of Solid-State Circuits, vol. 37, No. 10, Oct. 2002.
Analog Devices, inc.
Bromberg & Sunstein LLP
Wamsley Patrick
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