TuckerD. G., “Modulators and Frequency-Changers with Zero Loss,”Dept. of Electronic and Electrical Engineering, University of Birmingham, Memorandum No. 419, 1971. (Copies of this report can be supplied to bona fide enquirers.) The general background of modulator theory is to be found in
2.
BelevitchV., “Théorie des Circuits Non-Linéaires en Régime Alternatif,”Librairie Universitaire Uystpruyst, Louvain, 1959, or
3.
TuckerD. G., “Circuits with Periodically-Varying Parameters,”Macdonald, London, 1964. The second-order ring modulator is fully examined in
