New class of time-varying filters
- 1 April 1967
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 3 (4) , 158-160
- https://doi.org/10.1049/el:19670124
Abstract
A new class of time-varying lowpass and highpass filters is described in which the stopband attenuation is obtained by outphasing in a quadrature-modulation arrangement, the undesired associated frequency translation or inversion being cancelled by a suitably chosen second step of quadrature demodulation or both; bandpass and bandstop filters can be obtained as combinations of lowpass and highpass filters.Keywords
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