Switched-Current Filters Using Component Simulation
نویسندگان
چکیده
The paper discusses the synthesis of switched-current filters from continuous-time prototypes by the simulation of components, particularly capacitors and transconductors in OTA-C filters. The obtained structures implement discretetime versions of the nodal equations of the prototype circuit using Euler or bilinear transformations over the circuit elements. All the proposed structures work with doubled effective sampling rate, do not use current-conducting switches, and are operated with a two-phases, non-overlapping clock system.
منابع مشابه
Sensitivity and error reduction by component swapping in switched-current filters
This paper describes a procedure for the simulation of passive filters using switched-current techniques, where sensitivity reduction is obtained by swapping the positions and roles of pairs of identical elements at successive switching periods. The technique can produce significant reduction of sensitivity to element mismatches at low cost in terms of added complexity and without reducing the ...
متن کاملUnbalanced lattice switched-current filters
This paper shows how switched-current filters can be derived from passive filters obtained by the unbalancing of doubly terminated LC lattice structures. The process is similar to what would be done for the simulation of more conventional ladder structures, but the use of lattice prototypes allows the realization in an almost physically symmetrical structure. A comparation of sensitivity charac...
متن کاملSwitched-Current Wave Group Delay Equalizers
To improve the elliptic filters step response, group delay equalizers are often cascaded with the filters. This paper describes the design of switched-current (SI) group delay equalizer using wave synthesis technique. This design is based on a new all-pass circuit, where the poles are generated using wave structures. Simulation results are included demonstrating that the 3 rd-order SI group del...
متن کاملDesign and Measurements of Current Mode Filters Using CMOS Technology
Current mode circuits cover an important area of application like filters, neural networks and analog-digital conversion. Current mode circuits, because of their special structure, need appropriate methodology during design process. This paper is an overview of most common problems related with analog and mixed digital-analog converters and filters performed in a CMOS technology. Laboratory mea...
متن کاملRealization of Transistor-Only High-Order Current-Mode Filters
Linear transformation transistor-only high-order currentmode filters are presented in this Letter. Based on the systematic design procedure, we can realize high-order current-mode filters employing switched-current technique efficiently. Only two kinds of switched-current basic cells are needed in our design to obtain simple architectures. The fifth-order Chebychev lowpass filter is designed to...
متن کامل