Method and System for Processing an Analog Signal
AssigneeStichting IMEC Nederland
InventorRoland Van Wegberg
Life of this patent
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Abstract
Example embodiments relate to methods and systems for processing analog signals. One example method for processing an analog signal includes modulating the analog signal using a chopping signal with a chopping frequency fchop to generate a modulated signal. The method also includes amplifying the modulated signal to generate an amplified signal. Additionally, the method includes low-pass filtering the amplified signal to generate a filtered signal that includes at least one harmonic of the modulated signal. Further, the method includes sub-sampling the filtered signal and performing a correlated double sampling operation by subtracting samples at the chopping frequency.
Claims20
A method for processing an analog signal comprising:
- modulating the analog signal using a chopping signal with a chopping frequency fchop to generate a modulated signal;
- amplifying the modulated signal to generate an amplified signal;
- low-pass filtering the amplified signal to generate a filtered signal comprising at least one harmonic of the modulated signal;
- and
- sub-sampling the filtered signal and performing a correlated double sampling operation by subtracting samples at the chopping frequency.
A system for processing an analog signal comprising:
- a chopper configured to modulate the analog signal using a chopping signal with a chopping frequency fchop to generate a modulated signal;
- an amplifier configured to amplify the modulated signal to generate an amplified signal;
- a low-pass filter configured to filter the amplified signal to generate a filtered signal comprising at least one harmonic of the modulated signal;
- an analog-to-digital converter configured to sub-sample the filtered signal;
- and
- a correlated double sampling block configured to perform a correlated double sampling operation by subtracting samples at the chopping frequency.
A system comprising:
- a sensor configured to generate an analog signal;
- a chopper configured to modulate the analog signal using a chopping signal with a chopping frequency fchop to generate a modulated signal;
- an amplifier configured to amplify the modulated signal to generate an amplified signal;
- a low-pass filter configured to filter the amplified signal to generate a filtered signal comprising at least one harmonic of the modulated signal;
- an analog-to-digital converter configured to sub-sample the filtered signal;
- and
- a correlated double sampling block configured to perform a correlated double sampling operation by subtracting samples at the chopping frequency.
Dependencies are inferred from the claim text.