Carrier converter comprising a variable impedance circuit...
Carrier lock detector for a qam system
Circuit and method for i/q modulation with independent, high...
Circuit for recovering the carrier of an amplitude-...
Communications apparatus
Compact, direct fm modulator providing constant deviation on...
Constant envelope offset qpsk modulator
Converter for converting a modulating signal with variable...
Correction method and correction loop for a complex digital...
Correction of amplitude and phase imbalance in psk receivers
Crystal oscillation modulating circuit