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US 12,282,589 B2Granted
Electronic device including an electronic module and a compensation circuit
AssigneeSTMicroelectronics (Rousset) SAS
InventorNicolas Demange
Life of this patent
Estimating the term…
Abstract
An electronic device includes a power supply terminal, a voltage regulator connected to the power supply terminal, an electronic module connected to the voltage regulator, and a compensation circuit configured to receive an auxiliary current generated by the voltage regulator and being equal to a first fraction of the electronic module current. The compensation circuit includes a current source configured to supply a source current to a cold point, and a compensation stage connected to the power supply terminal and being traversed by an intermediate current equal to a difference between the source current and the auxiliary current and by a complementary current equal to the intermediate current multiplied by an inverse multiplication factor of the first fraction.
Claims14
An electronic device comprising:
- a power supply terminal configured to be connected to a power supply;
- at least one voltage regulator connected to the power supply terminal;
- at least one electronic module connected to the at least one voltage regulator and configured to consume an electronic module current coming from the power supply;
- and
- a compensation circuit connected to the at least one voltage regulator and configured to receive an auxiliary current generated by the at least one voltage regulator and being equal to a first fraction of the electronic module current consumed by the at least one electronic module, the compensation circuit including:
- a current source connected to the at least one voltage regulator so as to receive the auxiliary current and being configured to supply to a cold point a source current greater than a maximum value of the electronic module current consumed by the at least one electronic module;
- and
- a compensation stage including:
- a first resistor and a second resistor each having a first terminal connected to the power supply terminal, the first resistor having a first resistive value equal to a second resistive value of the second resistor multiplied by an inverse of a multiplication factor of the first fraction, the first resistor having a second terminal connected to the current source so as to be traversed by an intermediate current equal to a difference between the source current and the auxiliary current;
- a first transistor having a drain connected to a second terminal of the second resistor and a source connected to the cold point;
- and
- a first operational amplifier configured to control the first transistor and having an inverting input connected to the second terminal of the first resistor and a non-inverting input connected to the second terminal of the second resistor, so that the second resistor is traversed by a complementary current equal to the intermediate current multiplied by the multiplication factor.
9 more elements
An electronic device comprising:
- a power supply terminal configured to be connected to a power supply;
- at least one voltage regulator connected to the power supply terminal;
- at least one electronic module connected to the at least one voltage regulator and configured to consume an electronic module current coming from the power supply;
- and
- a compensation circuit connected to the at least one voltage regulator and configured to receive an auxiliary current generated by the at least one voltage regulator and being equal to a first fraction of the electronic module current consumed by the at least one electronic module, the compensation circuit including:
- a current source connected to the at least one voltage regulator so as to receive the auxiliary current and being configured to supply to a cold point a source current greater than a maximum value of the electronic module current consumed by the at least one electronic module, wherein the current source comprises:
- at least one current mirror configured to generate the source current from a reference current;
- a reference branch;
- and
- an auxiliary current generation branch for each current mirror;
- and
- a compensation stage including:
- a first resistor and a second resistor each having a first terminal connected to the power supply terminal, the first resistor having a first resistive value equal to a second resistive value of the second resistor multiplied by an inverse of a multiplication factor of the first fraction, the first resistor having a second terminal connected to the current source so as to be traversed by an intermediate current equal to a difference between the source current and the auxiliary current;
- a first transistor having a drain connected to a second terminal of the second resistor and a source connected to the cold point;
- and
- a first operational amplifier configured to control the first transistor and having an inverting input connected to the second terminal of the first resistor and a non-inverting input connected to the second terminal of the second resistor, so that the second resistor is traversed by a complementary current equal to the intermediate current multiplied by the multiplication factor.
13 more elements
Dependencies are inferred from the claim text.