| 摘要 |
PURPOSE: Switched-current delta-sigma modulators, such as are used in oversampling analog-to-digital (A/D) converters are provided to offer reduced power consumption and chip area. CONSTITUTION: A first combiner is for generating a first combined signal by combining an analog input current signal with an analog version of a digital output signal. A first integrator having a first bias current and a first signal swing is for integrating the first combined signal. A first amplifier is for amplifying the first integrated signal by a first scaling factor. A second amplifier is for amplifying the analog version of the digital output signal by a second scaling factor greater than the first scaling factor. A third amplifier is for amplifying the second integrated signal by a third scaling factor greater than the first scaling factor. A current quantizer is for quantizing the third amplified signal to generate the digital output signal.
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