Methods and devices for compact voltage supply switching
AssigneeSamsung Electronics Co., Ltd.
InventorsYing CHEN, Tienyu CHANG, Xiaohua YU
Life of this patent
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Abstract
Methods and apparatuses are provided in which a level shifter of a digital control circuit for a switchable voltage supply circuit shifts a domain level of a first input. A first inverter of the digital control circuit inverts output of the first level shifter to output a first gain voltage to turn on a first switch of the switchable voltage supply circuit or output a second gain voltage to turn off the first switch. A second inverter of the digital control circuit inverts a second input to output a third gain voltage to turn on a second switch of the switchable voltage supply circuit or output a fourth gain voltage to turn off the second switch. The first gain voltage is greater than the third gain voltage.
Claims20
A digital control circuit of a switchable voltage supply circuit, the digital control circuit comprising:
- a first gain voltage path comprising at least a first level shifter and a first inverter, the first level shifter being configured to shift a voltage domain level of a first input, and the first inverter being configured to invert output of the first level shifter, and output a first gain voltage to turn on a first switch of the switchable voltage supply circuit or output a second gain voltage to turn off the first switch;
- and
- a second gain voltage path comprising at least a second inverter configured to receive a second input, wherein the second inverter is configured to output a third gain voltage to turn on a second switch of the switchable voltage supply circuit or output a fourth gain voltage to turn off the second switch,
- wherein the first inverter outputs the second gain voltage in case that the second inverter outputs the third gain voltage, the second inverter outputs the fourth gain voltage in case that the first inverter outputs the first gain voltage, and the first gain voltage is greater than the third gain voltage.
A switchable voltage supply circuit comprising:
- voltage supply switches, each of the voltage supply switches receiving a different source voltage;
- and
- a digital control circuit comprising:
- a first gain voltage path comprising at least a first level shifter and a first inverter, the first level shifter being configured to shift a voltage domain level of a first input, and the first inverter being configured to invert output of the first level shifter, and output a first gain voltage to turn on a first switch of the voltage supply switches or output a second gain voltage to turn off the first switch;
- and
- a second gain voltage path comprising at least a second inverter configured to receive a second input, wherein the second inverter is configured to output a third gain voltage to turn on a second switch of the voltage supply switches or output a fourth gain voltage to turn off the second switch,
- wherein the first inverter outputs the second gain voltage in case that the second inverter outputs the third gain voltage, the second inverter outputs the fourth gain voltage in case that the first inverter outputs the first gain voltage, and the first gain voltage is greater than the third gain voltage.
A method comprising:
- shifting a voltage domain level of a first input at a level shifter of a digital control circuit for a switchable voltage supply circuit;
- inverting, at a first inverter of the digital control circuit, output of the first level shifter to output a first gain voltage to turn on a first switch of the switchable voltage supply circuit or output a second gain voltage to turn off the first switch;
- inverting, at a second inverter of the digital control circuit, a second input to output a third gain voltage to turn on a second switch of the switchable voltage supply circuit or output a fourth gain voltage to turn off the second switch,
- wherein the first inverter outputs the second gain voltage in case that the second inverter outputs the third gain voltage, the second inverter outputs the fourth gain voltage in case that the first inverter outputs the first gain voltage, and the first gain voltage is greater than the third gain voltage.
Dependencies are inferred from the claim text.