Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Patent
1998-07-17
2000-09-19
Young, Brian
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
H03M 300
Patent
active
06121910&
ABSTRACT:
An electronic device for converting an analog input signal into a digital output signal includes: a summing device for adding the analog input signal with a feedback analog signal and for generating a summer output signal representative of the sum of the analog input signal and the feedback analog signal; an analog filter coupled to the summing device for filtering undesired signal components from the summer output signal; an analog mixer receiving a signal having a first mixer frequency and coupled to receive the output of the analog filter for frequency translating the filtered summer output signal to a frequency translated summer output signal having one or more frequency components different than the input frequency; a quantizer coupled to the analog mixer for sampling the frequency translated summer output signal at a sampling frequency and for generating the digital output signal; and a feedback branch coupled between the quantizer and summing device for providing the feedback analog signal to the summing device. The feedback branch includes a digital mixer coupled to the quantizer, the digital mixer having a second mixer frequency for frequency translating the digital output signal to a frequency translated digital output signal; and a digital-to-analog converter for converting the frequency translated digital output signal to the feedback analog signal having a frequency equal to the input frequency. The device utilizes frequency translation inside the feedback loop to perform direct conversion of the analog signal to baseband.
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Khoury John
Tao Hai
Kost Jason L. W.
The Trustees of Columbia University in the City of New York
Young Brian
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