Patent ID: 8050319

Claim:
A signal generating apparatus, comprising: a signal modulating unit, for processing a modulation upon an input signal to generate a modulated signal; a selection signal generating unit, for generating at least a first selection signal; and a phase adjusting unit, coupled to the signal modulating unit and the selection signal generating unit, for receiving the modulated signal and adjusting a pulse width of the modulated signal to generate an output signal according to the first selection signal, wherein the phase adjusting unit comprises: a logic circuit, for adjusting the pulse width of the modulated signal by performing a logic operation upon the modulated signal and a specific delay signal; a phase delayer, for generating a plurality of delay signals according to the modulated signal, where the delay signals correspond to different phases respectively; and a selection circuit, coupled to the phase delayer and the selection signal generating unit, for generating the output signal according to the delay signals and the first selection signal, wherein the selection circuit comprises: a first multiplexer for selecting the specific delay signal from the delay signals according to the first selection signal, and the output signal is generated according to the specific delay signal.