The invention relates to a method to reduce the power consumption of an electronic device comprising at least one voltage regulator. At least one of the regulators (REG1-REG4) is switched off and on according to a predetermined duty cycle during such periods when the electronic device does...http://www.google.co.uk/patents/US5717319?utm_source=gb-gplus-sharePatent US5717319 - Method to reduce the power consumption of an electronic device comprising a voltage regulator 
