An apparatus comprises a first circuit, a second circuit, a first transistor, a second transistor, a third transistor, a first programmable resistance, and a second programmable resistance. The first circuit may be configured to generate a reference signal and a bias signal in response to a supply voltage and a first input signal. The first circuit generally provides supply noise rejection to variations in the supply voltage. The second circuit may be connected to the first circuit and a ring oscillator. The first transistor may be connected to the first circuit and configured to set a first reference current of the first circuit based on the first input signal and the first programmable resistance. The second transistor may be connected in parallel with the first transistor. The second transistor is generally diode-connected. The third transistor may be connected to the first circuit and configured to set a second reference current of the first circuit based on the first input signal and the second programmable resistance. The first circuit generally forms a current mirror with the second circuit. The second circuit may be configured to provide a programmable current ratio for the current mirror based on a value of a second input signal.

An aspect relates to an apparatus, including: a ring oscillator coupled between a first node and a first voltage rail; a control circuit coupled to the first node; a delay line coupled between a second node and the first voltage rail; and a voltage regulator including an input coupled to the first node and an output coupled to the second node.

An aspect relates to an apparatus, including: a ring oscillator coupled between a first node and a first voltage rail; a control circuit coupled to the first node; a delay line coupled between a second node and the first voltage rail; and a voltage regulator including an input coupled to the first node and an output coupled to the second node.

An overcurrent detection device of the present disclosure has two charge storage circuits, a control module and a counter circuit. The control module controls and provides charge paths of the two charge storage circuits, so that the two charge storage circuits are charged by a reference current and a sensed current respectively, wherein the sensed current is generated by an output current of a low-dropout regulator. The counter circuit obtains a voltage of the charge storage circuit charged by the sensed current, and counts accordingly. When the counting of the counter circuit reaches a specific value, the counter circuit outputs an overcurrent detection signal. When the output current is an overcurrent, the counter circuit first counts to the specific value before the charge storage circuit which is charged by the reference current is charged to a specific voltage.

In examples, an apparatus includes a FET, first and second voltage-to-current circuits, a current selection circuit, and a comparator. The FET has first and second segments. The first segment has a first gate coupled to the first voltage-to-current circuit, a first source, and a first drain. The second segment has a second gate coupled to the second voltage-to-current circuit, a second source coupled to the first source, and a second drain coupled to the first drain. The current selection circuit has a current selection circuit output and first and second current selection inputs. The first current selection circuit input is coupled to the first voltage-to-current circuit. The second current selection circuit input is coupled to the second voltage-to-current circuit. The comparator has a comparator output and first and second comparator inputs, the first comparator input is coupled to the current selection circuit output.

The present invention concerns an electronic circuit power supply device, configured to: flow, through a first conductor connected to a node, a first current that is an image of a second current consumed by the electronic circuit; flow a third current through a second conductor connected to the node, a first branch of a current mirror conducting the third current; flow a fourth constant current through a third conductor connected to the node; consume a fifth current that is an image of the third current; and regulate a potential of the node by acting on a gate potential of a transistor electrically in series with a second branch of the current mirror.

The present invention concerns an electronic circuit power supply device, configured to: flow, through a first conductor connected to a node, a first current that is an image of a second current consumed by the electronic circuit; flow a third current through a second conductor connected to the node, a first branch of a current mirror conducting the third current; flow a fourth constant current through a third conductor connected to the node; consume a fifth current that is an image of the third current; and regulate a potential of the node by acting on a gate potential of a transistor electrically in series with a second branch of the current mirror.

Regulator circuitry includes first to third output transistors, a first control transistor and a circuit stage. The first and second output transistors, and the first control transistor have a first channel conductivity type. The second output transistor has a second channel conductivity type. The first and second output transistors each have a drain coupled to an output node and a source coupled to a first power supply line. The third output transistor has a drain coupled to the output node and a source coupled to a second power supply line. The first control transistor has a gate coupled to a gate of the first output transistor and a source coupled to a gate of the second output transistor. The circuit stage is configured to drive the gates of the first output transistor, the third output transistor, and the first control transistor based on a specified level of the output voltage.

Regulator circuitry includes first to third output transistors, a first control transistor and a circuit stage. The first and second output transistors, and the first control transistor have a first channel conductivity type. The second output transistor has a second channel conductivity type. The first and second output transistors each have a drain coupled to an output node and a source coupled to a first power supply line. The third output transistor has a drain coupled to the output node and a source coupled to a second power supply line. The first control transistor has a gate coupled to a gate of the first output transistor and a source coupled to a gate of the second output transistor. The circuit stage is configured to drive the gates of the first output transistor, the third output transistor, and the first control transistor based on a specified level of the output voltage.

An output circuit includes an output driver, a voltage regulator, a control circuit and a charge pump circuit. The output driver includes a signal input terminal, a signal output terminal and a first power receiving terminal. The voltage regulator is coupled to the first power receiving terminal of the output driver. The control circuit is coupled to the signal input terminal of the output driver. The charge pump circuit is coupled to the control circuit and the first power receiving terminal of the output driver.