A switching regulator (20) includes a sense resistor (Rs), a sense current generating circuit (213) for generating a sense current (Isense) commensurate with a sense voltage (Vsense), a slope current generating circuit (214) for generating a slope current (Islope) with a ramped or triangular waveform,...http://www.google.com.au/patents/US7750617?utm_source=gb-gplus-sharePatent US7750617 - Switching regulator and electronic device therewith
