Title :
Switched-capacitor impedance simulation circuits realized with simplified circuit structure
Author_Institution :
Dept. of Electron. Eng., Saitama Inst. of Technol., Japan
Abstract :
This paper describes switched-capacitor (SC) inductor and Frequency Dependent Negative Resistor (FDNR) which use unity gain buffer (UGB) in common with another SC circuit to simplify circuit structure. Though common use of UGB has been reported in many references, UGB is usually connected to the same nodes and it often suffers simplification of SC circuits. In this paper, UGB is used in common with another SC circuit in a different way and SC inductor with simpler structure is obtained. The circuit is controlled by a simple two phase control clock. The capacitor value spreads and the sum of capacitor values is small. The number of capacitors needed is four. Then this SC inductor is modified to introduce SC FDNR. The sum of capacitor values and number of capacitors in the SC FDNR are the smallest value in SC FDNR circuits reported so far. To confirm basic operations of circuits proposed, simulation results by SWITCAP are also shown
Keywords :
active networks; buffer circuits; circuit analysis computing; digital simulation; inductors; negative resistance devices; switched capacitor networks; SC inductor; SWITCAP; capacitor value; circuit structure; frequency dependent negative resistor; switched-capacitor impedance simulation circuits; two phase control clock; unity gain buffer; Circuit simulation; Clocks; Impedance; Inductors; Operational amplifiers; Phase control; Resistors; Switched capacitor circuits; Switches; Switching circuits;
Conference_Titel :
Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on
Print_ISBN :
0-7803-3583-X
DOI :
10.1109/ISCAS.1997.608724
