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US 11,886,215 B2Granted
Voltage regulator, integrated circuit and method for voltage regulation
AssigneeAms AG
InventorCarlo Fiocchi
Life of this patent
Estimating the term…
Abstract
A voltage regulator comprises an output transistor with a controlled section connected between a first supply terminal and an output terminal. An amplifier comprises a reference input and a feedback input. A current mirror comprising a replica transistor. The current mirror is configured to mirror and attenuate a load current supplied by the output transistor to the replica transistor. A filter circuit is coupled to a controlled section of the replica transistor and coupled to the feedback input of the amplifier via the output terminal.
Claims16
A voltage regulator, comprising
- an output transistor with a controlled section connected between a first supply terminal and an output terminal,
- an amplifier comprising a reference input,
- a current mirror comprising a replica transistor, wherein the current mirror is configured to mirror and attenuate a load current supplied by the output transistor to the replica transistor, and
- a filter circuit coupled to a controlled section of the replica transistor and coupled to the output terminal, such that the attenuated and filtered load current is re-injected in parallel to the load current via the output terminal.
1 more element
A method for voltage regulation, comprising:
- sensing a load current by an output transistor of a voltage regulator,
- mirroring and attenuating the load current supplied by the output transistor to a replica transistor,
- filtering of the attenuated load current by means of a filter circuit coupled to the replica transistor, and
- re-injecting the attenuated and filtered load current as additional load current of the voltage regulator.
1 more element
A voltage regulator, comprising
- an output transistor with a controlled section connected between a first supply terminal and an output terminal,
- an amplifier comprising a reference input,
- a current mirror comprising a replica transistor, wherein the current mirror is configured to mirror and attenuate a load current supplied by the output transistor to the replica transistor, and
- a filter circuit coupled to a controlled section of the replica transistor and coupled to the output terminal, wherein
- the output terminal is an NMOS transistor,
- the current mirror comprises a diode-connected transistor such that the controlled sections of the diode-connected transistor and the replica transistor are electrically connected to each other's control sides, and
- the output transistor is connected to a circuit node via the controlled sections of the output transistor.
4 more elements
Dependencies are inferred from the claim text.