摘要:
Various circuit techniques to implement continuous-time filters with improved performance are disclosed. The present invention uses RMC type integrators that exhibit lower harmonic distortion. In one embodiment, a novel high-gain two-pole operational amplifier is used along with RMC architecture to achieve lower harmonic distortion. In another embodiment, the present invention uses dummy polysilicon resistors to accurately compensate for the distributed parasitics of the polysilicon resistors used in RMC integrator. In yet another embodiment, the present invention provides an on-chip tuner with a differential architecture for better noise immunity.
摘要:
A method and apparatus for performing pipelined capacitive folding and interpolation analog-to-digital conversion. In one embodiment, the apparatus comprises a multistage pipelined analog-to-digital converter having: a distributed sample/hold and preamp, folding and interpolation unit which combines a plurality of preamplified signals using a capacitive folding and capacitive interpolation; and a decoding unit coupled to decode the output signals from the folding and interpolation unit. The distributed sample/hold and preamp drastically improves the input dynamic range and hence increases ADC over all linearity. This technique offers an inherent dynamic offset cancellation in every sample and can be implemented in submicron CMOS, using the core digital supply.
摘要:
A method and apparatus for performing pipelined capacitive folding and interpolation analog-to-digital conversion. In one embodiment, the apparatus comprises a multistage pipelined analog-to-digital converter having: a distributed sample/hold and preamp, folding and interpolation unit which combines a plurality of preamplified signals using a capacitive folding and capacitive interpolation; and a decoding unit coupled to decode the output signals from the folding and interpolation unit. The distributed sample/hold and preamp drastically improves the input dynamic range and hence increases ADC over all linearity. This technique offers an inherent dynamic offset cancellation in every sample and can be implemented in submicron CMOS, using the core digital supply.
摘要:
A method and apparatus for performing pipelined capacitive folding and interpolation analog-to-digital conversion. In one embodiment, the apparatus comprises a multistage pipelined analog-to-digital converter having: a distributed sample/hold and preamp, folding and interpolation unit which combines a plurality of preamplified signals using a capacitive folding and capacitive interpolation; and a decoding unit coupled to decode the output signals from the folding and interpolation unit. The distributed sample/hold and preamp drastically improves the input dynamic range and hence increases ADC over all linearity. This technique offers an inherent dynamic offset cancellation in every sample and can be implemented in submicron CMOS, using the core digital supply.
摘要:
A method and apparatus for performing pipelined capacitive folding and interpolation analog-to-digital conversion. In one embodiment, the apparatus comprises a multistage pipelined analog-to-digital converter having: a distributed sample/hold and preamp, folding and interpolation unit which combines a plurality of preamplified signals using a capacitive folding and capacitive interpolation; and a decoding unit coupled to decode the output signals from the folding and interpolation unit. The distributed sample/hold and preamp drastically improves the input dynamic range and hence increases ADC over all linearity. This technique offers an inherent dynamic offset cancellation in every sample and can be implemented in submicron CMOS, using the core digital supply.