Patent ID: 6937489

Claim:
An inverter for converting a DC input voltage into an AC output voltage, the inverter comprising: (a) a sigma-delta modulation (SDM) controller for producing a modulated output voltage signal according to a reference voltage signal, wherein the SDM controller comprises: (i) an integrator for producing an integrator output signal having an integrated output slope according to a difference between the reference voltage signal and the modulated output voltage signal; (ii) a sample-and-hold circuit electrically connected to the integrator for sampling and holding the integrator output signal; and (iii) a quantizer circuit electrically connected to the sample-and-hold circuit and to an input terminal of the integrator through an output terminal thereof for quantizing the integrator output signal and producing the modulated output voltage signal; (b) a driving circuit electrically connected to the SDM controller for producing a driving signal according to the modulated output voltage signal; and (c) a power inversion stage circuit electrically connected to the driving circuit for producing the AC output voltage according to the driving signal.