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Quadrature bandpass SigmaDelta modulators based on polyphase filters are suited for analog-to-digital conversion in GSM/EDGE low-IF receivers. This paper presents a continuous-time quadrature bandpass sigma-delta (SigmaDelta) modulator with a chain of integrators with weighted capacitive feedforward summation (CICFF) topology - which is a desirable solution for implementation in low power applications...
This paper presents a continuous-time quadrature bandpass sigma-delta (SigmaDelta) modulator with a chain of integrators with weighted capacitive feedforward summation (CICFF) topology-which is suited for implementation in low power applications. A new compensation scheme for a polyphase filter is proposed. The summation of feedforward signals is implemented by weighted capacitors, without the necessity...
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