An interference rejection filter for an ultra-wideband quadrature downconversion autocorrelation receiver

—An analog filter is designed based upon the requirement of an interference rejection filter for the Quadrature Downconversion Autocorrelation Receiver (QDAR). The transfer function of an eight-order elliptic bandpass filter is selected. As a result, a state-space approach (i.e. the orthonormal form [1]) is adopted, which is intrinsically semi-optimized for dynamic range, has low sensitivity, high sparsity and its coefficients can be physically implemented. Each coefficient in the state-space description of the filter is implemented at circuit level using a novel 2-stage gm cell based upon the principle of negative feedback. Simulation results in IBM’s Bi-CMOS 0.18 µm technology show that the interference

• Type: Conference
• Year: 2005
• Where: ISCAS
• Authors: Sumit Bagga, Sandro A. P. Haddad, Koen van Hartingsveldt, Simon Lee, Wouter A. Serdijn, John R. Long
• Keywords: Elliptic Bandpass Filter, Interference Rejection Filter, ISCAS 2005, —An Analog Filter