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Stub filters to improve blocker tolerance in continuous-time residue generation analog-to-digital converters
Stub filters to improve blocker tolerance in continuous-time residue generation analog-to-digital converters
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机译:短截线滤波器可提高连续时间残留物产生模数转换器的阻断剂耐受性
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摘要
Residue generation systems for use in continuous-time and hybrid ADCs are disclosed. An example residue generation system includes at least one stub filter, configured to generate a modified analog input based on an analog input, and a quantizer, configured to generate a digital input to a feedforward DAC based on the modified analog input generated by the filter. The feedforward DAC is configured to generate a feedforward path analog output based on the digital input generated by the quantizer, and the system may further be configured to generate a residue signal based on the feedforward path analog output. Providing one or more stub filters that filter the analog input before it is quantized by the quantizer advantageously allows blockers to be attenuated before they are sampled and aliased by the quantizer.
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