Common mode management between a current-steering DAC and transconductance filter in a transmission system
First Claim
Patent Images
1. A transmission circuit comprising:
- a current-steering digital-to-analog converter (DAC) that provides an analog signal from an input digital signal;
a transconductance filter connected to the current-steering DAC, the transconductance filter receiving the analog signal and filtering the analog signal for transmission; and
a common mode circuit operable to generate a reference voltage and provide the reference voltage to the current-steering DAC and the transconductance filter to provide common mode compatibility between the current-steering DAC and the transconductance filter.
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Abstract
Common mode management between a DAC, such as a current-steering DAC, and a transconductance filter in a high-frequency transmission system. In one aspect of the invention, a transmission circuit includes a DAC that provides an analog signal from an input digital signal, and a filter such as a transconductance filter connected to the DAC, the filter receiving the analog signal and filtering the analog signal for transmission. A common mode management circuit connected to the DAC and the transconductance filter provides common mode compatibility in the interface connecting the DAC and the transconductance filter.
18 Citations
25 Claims
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1. A transmission circuit comprising:
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a current-steering digital-to-analog converter (DAC) that provides an analog signal from an input digital signal; a transconductance filter connected to the current-steering DAC, the transconductance filter receiving the analog signal and filtering the analog signal for transmission; and a common mode circuit operable to generate a reference voltage and provide the reference voltage to the current-steering DAC and the transconductance filter to provide common mode compatibility between the current-steering DAC and the transconductance filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A transmission circuit comprising:
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a digital-to-analog (DAC) that provides an analog signal from an input digital signal; a filter connected to the DAC, the filter receiving the analog signal and filtering the analog signal for transmission; and a common mode circuit operable to generate a reference voltage that is provided to the DAC and the filter to provide common mode compatibility between the DAC and the filter. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A transmission circuit comprising:
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a current-steering digital-to-analog converter (DAC) configured to receive a digital signal and to generate a corresponding analog signal; a transconductance filter configured to receive the analog signal; and a common mode circuit configured to provide a reference voltage to the current-steering DAC and the transconductance filter to provide a common mode compatibility between the current-steering DAC and the transconductance filter. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification