Design of a Current-Mode Bandpass Filter with Controllable Cutoff Frequency
In this paper, a bandpass filter with controllable cutoff frequency is designed by using current mode synthesis method which is good to design the low-voltage and low-power filter. The designed bandpass filter is composed of cascade connection between 3rd Butterworth highpass filter and 3rd Chebychev lowpass filter. And as a core circuit in the current-mode filter, a current-mode integrator and differentiator are designed and apply to designing filters. The cutoff frequency of the designed 6th bandpass filter can be controlled to 120kHz~54MHz according to control voltage, 0.7V~1.5V.
KeywordsCurrent-mode filter Bandpass filter Current-mode integrator Controllable cutoff frequency
Unable to display preview. Download preview PDF.
- 1.Mazurek, A., Wawryn, K.: Programmable Current Mode Circuits. In: ICECS, pp. 553–556 (September 2001)Google Scholar
- 4.Lee, S.-S., Zele, R.H., Allstot, D.J., Liang, G.: CMOS Continuous-Time Current-Mode Filters for High-Frequency Applications. IEEE JSSC 28(3), 125–136 (1993)Google Scholar
- 5.Pankiewicz, B., Wojcikowski, M., Szczepanski, S., Sun, Y.: A Field Programmable Analog Array for CMOS Continuous-Time OTA-C Filter Applications. IEEE JSSC 37(2), 125–136 (2002)Google Scholar