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US 2010/0301909 A1Published application
Startup circuitry and corresponding method for providing a startup correction to a main circuit connected to a startup circuitry
AssigneeSTMicroelectronics Design and Application S.R.O.
InventorJaromir Schindler
Life of this patent
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Abstract
A startup circuitry connected to a main circuit which has at least an output terminal connected to its feedback terminal by a feedback loop. The startup circuitry is connected to the main circuit in such a manner to break the feedback loop, by having a first circuit node connected to said output terminal of said main circuit and a second circuit node connected to its feedback terminal, said startup circuitry providing a correct output voltage value during the startup phase of said main circuit.
Claims29
A device, comprising:
- an input node configured to couple to an output of a circuit having a feedback input;
- a feedback output node configured to couple to the feedback input of the circuit;
- and
- a startup module configured to detect a startup condition of the circuit, and when a startup condition is detected, break a connection between the output node of the circuit and the feedback node of the circuit and provide a feedback output signal to the feedback node of the circuit.
1 more element
A method, comprising:
- detecting a startup state of a main circuit;
- generating a startup output voltage value corresponding to a voltage value of said main circuit at the end of said startup state;
- opening a feedback loop of said main circuit;
- and
- applying said startup output voltage value to an output terminal until an end of said startup state of said main circuit.
2 more elements
A system, comprising:
- a circuit configured to generate an output signal provided to an output node and having a feedback loop;
- means for detecting a startup state of the circuit;
- means for responding to detection of a startup state by interrupting the feedback loop and coupling an alternative output signal to the output node.
An integrated circuit, comprising:
- a first module configured to generate a first output signal and having a feedback input;
- a second module configured to generate a second output signal;
- and
- a startup module configured to:
- determine when the first module is in a startup mode;
- when the first module is in the startup mode, couple the second output signal to the feedback input of the first module;
- and
- when the first module is not in the startup mode, couple the first output signal to the feedback input of the first module.
5 more elements
Dependencies are inferred from the claim text.