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An Integrable Image Rejection System Using a Complex Analog Filter with Variable Bandwidth and Center Frequency Characteristics

Cosy MUTO, Hiroshi HOSHIKAWA

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Summary :

In this paper, we discuss an IF image rejection system with variable bandwidth and center frequency. The system is consists of a pair of frequency mixers multiplied by the complex sinusoid and a complex analog filter. By employing the complex leapfrog structure using OTA-C configuration and the frequency transformation from the normalized LPF, the proposed system is capable of variable bandwidth and center frequency characteristics. SPICE simulations result more than 43 [dB] image rejection is achieved for 6 [kHz] and 12 [kHz] bandwidths at 50 [kHz] IF.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E85-A No.2 pp.309-315
Publication Date
2002/02/01
Publicized
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DOI
Type of Manuscript
Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
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