Dual supply device with a single direct-current/direct-current converter and capacitive translator

A voltage supply device, comprising:

• a converter circuit comprising a power transistor having a first terminal coupled to a reference voltage source, a second terminal coupled through an inductive element to a supply voltage source, and a control terminal;
• an inverter having a first terminal coupled to the reference voltage source, a second terminal coupled to a first supply voltage output terminal, a control terminal, and an output terminal;
• a control circuit coupled to the control terminal of the power transistor and to the control terminal of the inventor and configured to provide a control signal to the power transistor and the inverter;
• and
• a voltage multiplier circuit coupled between the output terminal of the inverter and a second supply voltage output terminal, the voltage multiplier circuit configured to increase a voltage supplied by the inverter.

A voltage supply device, comprising:

• a converter circuit having a first terminal coupled to a reference voltage source, a second terminal coupled to a supply voltage source, a control terminal, a first output coupled to a first supply voltage output terminal, and a second output, the converter circuit comprising a power transistor having a first terminal coupled to the reference voltage source, a second terminal coupled through an inductor to the supply voltage source, a control terminal coupled to an output of the control circuit, a first diode connected by an anode terminal to the first terminal of the power transistor and by a cathode terminal to the second terminal of the power transistor, and further comprising a second diode having an anode terminal coupled to the second terminal of the power transistor and a cathode terminal coupled to the first supply voltage output;
• a translator circuit having a first supply terminal coupled to the first supply voltage output terminal, a second supply terminal coupled to the voltage reference source, a control terminal, and an output terminal coupled to a second supply voltage output terminal, the translator circuit comprising an inverter having a first terminal coupled to the first supply voltage output terminal and a second terminal coupled to the reference voltage source, the inverter further including a control terminal coupled to the control circuit and an output terminal coupled to a voltage multiplier circuit that in turn is coupled to the second supply voltage output terminal;
• and
• a control circuit coupled to the control terminals of the converter circuit and the translator circuit and configured to control operation of the converter circuit and the translator circuit to receive a first voltage from the supply voltage source and to output first and second supply voltages through the first and second supply voltage output terminals, respectively, with the first and second supply voltages having opposite polarities of substantially equal value that is greater than the value of the supply voltage.