Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2007-04-13
2008-08-19
Nguyen, Khai M (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S118000, C341S121000, C341S141000
Reexamination Certificate
active
07414559
ABSTRACT:
A bias circuit includes a digital to analog converter (D2A) generating an output representing a voltage level for tuning an analog signal. The D2A is coupled to a primary register frame that is one of a plurality of register frames forming a data chain. The plurality of register frames are serially linked and data within the data chain is shifted among the plurality of register frames. Through a time domain multiplexing scheme, the D2A can be shared by control knobs of the equalization circuit. The bias circuit includes a decoder also coupled to the primary register frame. An output enable logic module is also included. The output enable logic module determines when the primary register has a complete data set as the data within the data chain is shifting according to the clock period. A method for adjusting a signal through a bias circuit is also provided.
REFERENCES:
patent: 2005/0225517 (2005-10-01), Sun
patent: 2006/0132420 (2006-06-01), Yoshida et al.
Lai Tin
Shumarayev Sergey Yurevich
Wong Wilson
Altera Corporation
Martine & Penilla & Gencarella LLP
Nguyen Khai M
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