Device and method of digital gain programming using...

Details Device and method of digital gain programming using... Device and method of digital gain programming using...

2005-07-05

2005-07-05

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

Reexamination Certificate

active

06914546

ABSTRACT:
A sigma delta modulator (350) can be utilized in the Digital-to-Analog (DAC) portion (144) of a modem (120) to achieve a desired level of gain programming. A set of step coefficients (GP2, GP4) are utilized to determined the step size and thereby the overall gain of the modulator (350). A feedback path is provided and configured to deliver the output of the modulator to a gain control block (355) which provides control and stability across the entire transmission bandwidth. A multilevel digital output (320) is provided which represents levels of signal in the digital domain and reduces the number of discrete components required to achieve a particular amount of gain.

REFERENCES:
patent: 4851841 (1989-07-01), Sooch
patent: 5014238 (1991-05-01), McLeish et al.
patent: 6839010 (2005-01-01), Tsyrganovich
patent: 6842131 (2005-01-01), Lo et al.

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