SECOND ORDER ACTIVE MULTI-LOOP BAND PASS FILTER FOR VERY LOW FREQUENCY RECEIVER APPLICATIONS
| Author(s) | : | Bernard Atsuwe |
| Institution | : | Joseph Sarwuan Tarka University, Makurdi,Benue State |
| Published In | : | Vol. 9, Issue 8 — August 2022 |
| Page No. | : | 1-8 |
| Domain | : | Engineering |
| Type | : | Research Paper |
| ISSN (Online) | : | 2348-4470 |
| ISSN (Print) | : | 2348-6406 |
This paper presents the design and simulation of the second order multiple loop feedback bandpass filter which was simulated using Multisim version 14.2 software and studied for variable Quality factors Q of 50, 60, and 70 with a constant centre frequency (  from a band of the very low frequency of 3kHz to 30KHz so as to be implemented in the Receiver systems of a Very Low Frequency (VLF) wave communication system. The result shows a centre frequency for all the Q’s to be 16.546 kHz while the mid-band gain was 21.37dB, 20.79dB, and 19.52dB respectively for 50, 60, and 70. The bandwidth for the variable Q’s was 50.30kHz, 62.19kHz, and 71.38kHz respectively. From observation, the centre frequency is slightly shifted and mid-band gain decreased from 21.37dB to 19.52dB furthermore, the Bandwidth increases from 50.30 kHz to 71.38 kHz. Results from the simulated filter show good agreement with the theory. As such, we can conclude that the filter can be used in the receivers of a VLF wave communication system.
Bernard Atsuwe, “SECOND ORDER ACTIVE MULTI-LOOP BAND PASS FILTER FOR VERY LOW FREQUENCY RECEIVER APPLICATIONS”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 9, Issue 8, pp. 1-8, August 2022.
