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US 2017/0288693 A1Published application
Continuous time delta-sigma modulator with a time interleaved quantization function
AssigneeSTMicroelectronics International N.V.
InventorsAshish Sharma Kumar, Rajeev Jain, Chandrajit Debnath
Life of this patent
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Abstract
A wide band continuous time delta-sigma modulator implements a time interleaved quantization processing operation. The modulator may provide for an inherent finite impulse response filtering in the feedback loop. Additionally, further finite impulse response filtering in each time interleaved feedback path may be provided.
Claims12
A delta-sigma modulator circuit, comprising:
- an input configured to receive an analog input signal;
- a summation circuit configured to combine the analog input signal with an analog feedback signal to generate an analog output signal;
- a filter circuit configured to filter the analog output signal and generate a filtered analog signal;
- a plurality of time interleaved quantizer circuits, each quantizer circuit configured to receive the filtered analog signal and generate a corresponding digital signal;
- and
- a corresponding plurality of digital to analog converter circuits configured to receive corresponding ones of the digital signals from the time interleaved quantizer circuits and generate corresponding analog output signals that are combined to generate the analog feedback signal.
3 more elements
A delta-sigma modulator circuit, comprising:
- an input configured to receive an analog input signal;
- a summation circuit configured to combine the analog input signal with an analog feedback signal to generate an analog output signal;
- a filter circuit configured to filter the analog output signal and generate a filtered analog signal;
- a first quantizer circuit configured to receive the filtered analog signal and generate a first digital signal;
- a second quantizer circuit configured to receive the filtered analog signal and generate a second digital signal;
- wherein the first and second quantizer circuits operate in a time-interleaved manner;
- a first digital to analog converter circuit configured to receive the first digital signal and generate a first analog output signal;
- and
- a second digital to analog converter circuit configured to receive the second digital signal and generate a second analog output signal;
- wherein the first and second analog output signals combined form the analog feedback signal.
7 more elements
A delta-sigma modulator circuit, comprising:
- an input configured to receive an analog input signal;
- a summation circuit configured to combine the analog input signal with an analog feedback signal to generate an analog output signal;
- a filter circuit configured to filter the analog output signal and generate a filtered analog signal;
- a plurality of time interleaved quantizer circuits, each quantizer circuit configured to receive the filtered analog signal and generate a corresponding digital signal;
- a corresponding plurality of finite impulse response filters configured to receive corresponding ones of the digital signals from the time interleaved quantizer circuits and generate corresponding filtered digital signals;
- and
- a corresponding plurality of digital to analog converter circuits configured to receive corresponding ones of the filtered digital signals from the finite impulse response filters and generate corresponding analog output signals;
- wherein the analog output signals combined form the analog feedback signal.
5 more elements
Dependencies are inferred from the claim text.