SIGNAL INPUT DEVICE OF DIGITAL-RF CONVERTER

Method and system for frequency up-conversion

Method and system for frequency down-conversion and frequency up-conversion

Modulation circuit, modulation method, program and communication apparatus

Frequency modulation circuit

Frequency up-conversion using a harmonic generation and extraction module

Phase modulating apparatus, communication device, mobile wireless unit, and phase modulating method

Apparatus and method for communicating an input signal in polar representation

Frequency modulator and frequency modulation method

Method and system for frequency up-conversion with a variety of transmitter configurations