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| REALIZATIONS OF CIJRRENT-MODE CMOS OTA FILTERS |
| Wu Jie①; Qiu Guanyuan② |
| ①Hunan University, Changsha 410082;②Xi'an Jiaotong University,Xi'an 710049 |
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Abstract A methodology to synthesise continous-time current-mode filters using CMOS OTAs is presented. Second-order CMOS-OTA current fllters are systematically generated from the simulation of signal flow graph for a general biquadratic function .The non-ideal effects in high frequency compensation frequency characteristic of OTA-C filters are analyzed. A simple high off frequency method is discussed. Finally, A 4th-order Butterworth lowpasss filter with 1MHz cut and simulated with PSPICE program.
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Received: 27 May 1994
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1997, Vol. 19 
