Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2007-04-24
2007-04-24
Nguyen, Khai M. (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S141000, C341S143000
Reexamination Certificate
active
11269747
ABSTRACT:
A switch circuit shifts a bit number of a digital input signal sequentially according to a selection signal and outputs the shifted digital signal as a digital output signal. A switch control circuit receives a shift signal which changes to a random value, performs an operation on the bit number and a value indicated by the shift signal to generate a next bit number, and outputs the generated bit number as the selection signal. Since a random bit number is generated by the switch control circuit, the switch circuit can shift the bit number of the digital input signal in nonregular, random order and output the shifted digital signal as the digital output signal. By supplying the digital output signal to a D/A conversion part, D/A conversion accuracy can be improved.
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Arent & Fox LLP
Fujitsu Limited
Nguyen Khai M.
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