Boost converter topology for high efficiency and low battery voltage support

A method of selectively boosting an input voltage to an electronic device, comprising:

• characterizing an efficiency of a circuit;
• determining a crossover point for a ratio of output voltage to input voltage;
• and
• enabling or disabling a voltage boost converter based on the voltage crossover point.

A method of operating an amplifier, comprising:

• charging a capacitor to a doubled output voltage;
• isolating a battery input voltage from current demands of an amplifier;
• and
• providing supply current from a storage capacitor.

An apparatus for boosting input voltage to an electronic device, comprising:

• an inductive boost converter circuit;
• an assisted switched capacitor doubler circuit;
• and
• a battery.

An apparatus for boosting an input voltage to an electronic device, comprising:

• means for applying a voltage across an inductor as a first switch is closed, wherein during the applying of the voltage a second switch and a third switch are closed and a fourth switch is opened;
• means for charging a first capacitor toward a selected output voltage;
• means for opening the first switch, causing a rise in voltage to a value sufficient to conduct a diode;
• means for opening the second switch and closing the fourth switch;
• and
• means for charging a second capacitor to twice the selected output voltage.

A apparatus for selectively boosting an input voltage to an electronic device, comprising:

• means for characterizing an efficiency of a circuit;
• means for determining a crossover point for a ratio of output voltage to input voltage;
• and
• means for enabling or disabling a voltage boost converter based on the voltage crossover point.

An apparatus for operating an amplifier, comprising:

• means for charging a capacitor to a doubled output voltage;
• means for isolating a battery input voltage from current demands of an amplifier;
• and
• means for providing supply current from a storage capacitor.

A non-transitory computer readable medium containing instructions, which when executed by a processor cause the processor to perform steps for boosting an input voltage to an electronic device, comprising:

• applying a voltage across an inductor as a first switch is closed, wherein during the applying of the voltage a second switch and a third switch are closed and a fourth switch is opened;
• charging a first capacitor toward a selected output voltage;
• opening the first switch, causing a rise in voltage to a value sufficient to conduct a diode;
• opening the second switch and closing the fourth switch;
• and
• charging a second capacitor to twice the selected output voltage.

A non-transitory computer-readable medium containing instructions, which when executed by a processor, cause the processor to selectively boost an input voltage to an electronic device by performing the following steps:

• characterizing an efficiency of a circuit;
• determining a crossover point for a ratio of output voltage to input voltage;
• and
• enabling or disabling a voltage boost converter based on the voltage crossover point.

A non-transitory computer-readable medium containing instructions, which when executed by a processor, cause the processor to perform the following steps:

• charging a capacitor to a doubled output voltage;
• isolating a battery input voltage from current demands of an amplifier;
• and
• providing supply current from a storage capacitor.