Apparatus and method for waking up a circuit
AssigneeInfineon Technologies AG
InventorVincent Gouin
Life of this patent
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Abstract
A method for waking up a circuit, comprising charging a voltage line of the circuit with a constant wake-up current until the voltage line reaches a predetermined voltage. Also, an apparatus, comprising a circuit portion, a switch configured to selectively couple an input of the circuit portion to a supply voltage, a current source configured to generate a first current, and a control circuit configured to control a state of the switch depending on the first current.
Claims22
A method for waking up a circuit, comprising charging a voltage line of the circuit with a constant wake-up current until the voltage line reaches a predetermined voltage, wherein the circuit comprises a memory circuit, and wherein the constant wake-up current is less than or equal to an access current of the memory circuit.
An apparatus, comprising:
- a circuit portion;
- a switch configured to selectively couple a supply voltage input of the circuit portion to a supply voltage;
- a current source configured to generate a first current that is smaller than or equal to a current flowing through the supply voltage input of the circuit portion during a normal operation of the circuit portion;
- and
- a control circuit configured to control a state of the switch depending on the first current,
- wherein the control circuit comprises an operational amplifier, an output of the operational amplifier being coupled with a control terminal of the switch.
An apparatus, comprising:
- a memory;
- a first switch comprising a control terminal, a first terminal, and a second terminal, the first terminal configured to be coupled with a supply voltage and the second terminal coupled with an input of the memory;
- an amplifier comprising an output coupled with the control terminal of the first switch, a first input coupled with the first terminal of the first switch, and a second input;
- and
- a current source coupled with the second input of the amplifier.
An apparatus, comprising:
- a circuit portion;
- a switch configured to selectively couple a supply voltage input of the circuit portion to a supply voltage;
- a current source configured to generate a first current that is smaller than or equal to a current flowing through the supply voltage input of the circuit portion during a normal operation of the circuit portion;
- and
- a control circuit configured to control a state of the switch depending on the first current,
- wherein the circuit portion comprises a memory circuit, and wherein the current flowing through the supply voltage input of the circuit portion during the normal operation is an access current of the memory circuit.
An apparatus, comprising:
- a circuit portion;
- a first switch having a control input and configured to selectively couple an input of the circuit portion to a supply voltage;
- a current source configured to generate a first current;
- a control circuit configured to control a state of a first switch so as to depend on the first current;
- and
- a second switch configured to selectively couple the control input of the first switch with the supply voltage,
- wherein the control circuit comprises an operational amplifier, an output of the operational amplifier being coupled with the control input of the first switch.
Dependencies are inferred from the claim text.