INTERFERENCE REDUCTION TECHNIQUES FOR MIXERS.
Abstract
The report describes a study of methods for controlling the interference susceptibility of mixers in communications receivers. The effects of several mixer characteristics which influence spurious product formations are discussed, including temperature, bias, and impedance effects. The dependence of spurious response levels on local oscillator drive is also considered, as a function of both local oscillator level and waveshape. A number of mixing techniques which provide control of spurious response levels are presented. A frequency-modulated oscillator is shown for which accurate prediction of response levels can be realized. The use of negative feedback in reducing mixer-generated interference is demonstrated for a transistor mixer. The application of a square wave local oscillator signal is shown to be effective in reducing the levels of responses associated with harmonics of the input signal. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1967
- Accession Number
- AD0809106
Entities
People
- E. E. Donaldson Jr.
- W. B. Warren Jr.
Organizations
- Georgia Tech