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US 11,251,807 B1Granted
Wide bandwidth ADC with inherent anti-aliasing and high DC precision
AssigneeAnalog Devices International Unlimited Company
InventorsNaiqian Ren, Roberto Sergio Matteo Maurino
Life of this patent
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Abstract
A wide bandwidth ADC circuit that combines a resistive-input continuous-time sigma-delta ADC circuit with a second ADC circuit having a switched capacitor input. The combination of these two ADC circuits can achieve an easy-to-drive, alias free, wide bandwidth ADC that has excellent DC precision.
Claims20
A wide bandwidth analog-to-digital converter (ADC) circuit comprising:
- a continuous-time sigma-delta first ADC circuit having a first input coupled to a resistive element to receive a first analog input signal and generate a first digital output signal;
- a second ADC circuit, independent of the continuous-time sigma-delta first ADC circuit, having a second input coupled to a switched capacitor circuit to receive a second analog input signal and an output to generate a second digital output signal that is independent of the first digital output signal;
- and
- a digital signal processor coupled to receive the first digital output signal and the second digital output signal and an output to generate at least one processed digital output signal.
1 more element
A method of operating a wide bandwidth ADC circuit, the method comprising:
- receiving, using a continuous-time sigma-delta first ADC circuit, a first analog input signal and generating a first digital output signal;
- receiving, using a second ADC circuit that is independent of the continuous-time sigma-delta first ADC circuit, a second analog input signal and generating a second digital output signal that is independent of the first digital output signal;
- and
- processing the first digital output signal and the second digital output signal and generating at least one processed digital output signal.
1 more element
A wide bandwidth analog-to-digital converter (ADC) circuit comprising:
- a first continuous-time sigma-delta ADC circuit having a first input coupled to a resistive element to receive a first analog input signal and generate a first digital output signal;
- a second continuous-time sigma-delta ADC circuit, independent of the first continuous-time sigma-delta ADC circuit, having a second input coupled to a switched capacitor circuit to receive a second analog input signal and an output to generate a second digital output signal that is independent of the first digital output signal;
- and
- a digital signal processor coupled to receive the first digital output signal and the second digital output signal and an output to generate at least one processed digital output signal.
1 more element
Dependencies are inferred from the claim text.