Analog-digital conversion
AssigneeAtmel Automotive GmbH
InventorsLourans Samid, Johannes Schaefer, Thomas Janz
Life of this patent
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Abstract
In one embodiment, a method includes receiving a first analog signal at a first input; receiving a second analog signal at a second input; mixing the first analog signal with a first oscillator signal having a first frequency; mixing the second analog signal with a second oscillator signal having a second frequency; converting a sum signal to a digital signal; generating a first control signal based on a first digital value of a first function and the digital signal; and generating a second control signal based on a second digital value of a second function and the digital signal.
Claims19
A circuit comprising:
- a first analog mixer configured to mix a first received analog signal with a first oscillator signal having a first frequency, the first oscillator signal received from a control device;
- a second analog mixer configured to mix a second received analog signal with a second oscillator signal having a second frequency, the second oscillator signal received from the control device;
- an analog-digital converter (ADC) configured to:
- convert a sum signal to a digital signal, the sum signal based on a first output of the first analog mixer and a second output of the second analog mixer;
- and
- output the digital signal to a digital multiplier;
- the control device configured to:
- output to the digital multiplier a first digital value of a first function having the first frequency and timed by a clock signal;
- and
- output to the digital multiplier a second digital value of a second function having the second frequency and timed by the clock signal, wherein the output of the first value and the second value are offset by a period of time;
- a first register configured to receive a first control signal from the control device, the first control signal based on the first digital value and a digital signal output from the digital multiplier;
- and
- a second register configured to receive a second control signal from the control device, the second control signal based on the second digital value and the digital signal output from the digital multiplier.
A method comprising:
- receiving a first analog signal at a first input;
- receiving a second analog signal at a second input;
- mixing the first analog signal with a first oscillator signal having a first frequency;
- mixing the second analog signal with a second oscillator signal having a second frequency;
- converting a sum signal to a digital signal, the sum signal based on a first mixed analog signal and a second mixed analog signal;
- generating a first control signal based on a first digital value of a first function and the digital signal;
- and
- generating a second control signal based on a second digital value of a second function and the digital signal.
A system comprising:
- a plurality of analog mixers coupled to a control device and an analog-digital converter (ADC);
- the analog-digital converter coupled to one or more digital multipliers;
- the one or more digital multipliers coupled to the control device and a plurality of registers;
- and
- a plurality of analog inputs, each coupled to each of a plurality of input circuits, the plurality of analogy inputs configured to input analog signals to the each of the plurality of analog mixers.
Dependencies are inferred from the claim text.