Title :
Bilinear transformed switched-current ladder interpolators
Author :
Ng, Andrew E J ; Sewell, J.I.
Author_Institution :
Dept. of Electron. & Electr. Eng., Glasgow Univ., UK
Abstract :
Switched-current (SI) interpolator circuits are proposed, which are based on bilinear-LDI ladders and FIR polyphase output networks. Settling time for the memory cells is maximised by operating at the lower input sampling frequency. The interpolator structures are derived via direct transposition and multirate transformation. Simulated results are presented and indicate improved sensitivity performance over existing direct-form SI interpolators
Keywords :
FIR filters; active filters; bilinear systems; interpolation; ladder filters; sensitivity analysis; switched current circuits; FIR polyphase output networks; bilinear-LDI ladders; direct transposition; input sampling frequency; memory cells; multirate transformation; sensitivity performance; settling time; switched-current ladder interpolators; Band pass filters; Circuit simulation; Circuit synthesis; Finite impulse response filter; Frequency synthesizers; Matrices; Network synthesis; Sampling methods; Switching circuits; Transfer functions;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780781
