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US 2006/0232326 A1Published application
Reference circuit that provides a temperature dependent voltage
OwnerHelmut Seitz, Russell Houghton +1inventors
InventorsHelmut Seitz, Russell Houghton, Ernst Stahl
Life of this patent
Estimating the term…
Abstract
A reference circuit that includes a first circuit configured to provide a temperature dependent current, a second circuit configured to provide a first current, and a third circuit. The third circuit is configured to provide a temperature dependent voltage based on the first current and the temperature dependent current. The temperature dependent voltage has a voltage versus temperature slope established by the third circuit and a voltage level established by the first current.
Claims32
A reference circuit comprising:
- a first circuit configured to provide a temperature dependent current;
- a second circuit configured to provide a first current;
- and
- a third circuit configured to provide a temperature dependent voltage based on the first current and the temperature dependent current, wherein the temperature dependent voltage has a voltage versus temperature slope established by the third circuit and a voltage level established by the first current.
1 more element
An electronic system comprising:
- a random access memory that includes a reference circuit configured to provide a temperature dependent reference voltage, wherein the reference circuit comprises:
- a temperature dependent current source configured to provide a temperature dependent current;
- a constant current source configured to provide a constant current;
- and
- a circuit configured to mirror the constant current and the temperature dependent current and provide the temperature dependent reference voltage based on the mirrored constant current and temperature dependent current, wherein the circuit is configured to provide a voltage level of the temperature dependent reference voltage based on the constant current and to establish a voltage versus temperature slope of the temperature dependent reference voltage.
2 more elements
A reference circuit comprising:
- a temperature dependent current source configured to provide a temperature dependent current;
- a constant current source configured to provide a constant current;
- a differential amplifier configured to receive a first constant voltage and provide an output voltage;
- a first transistor configured to receive the output voltage to provide a second constant voltage and to provide a first current comprising the temperature dependent current and the constant current;
- a second transistor configured to receive the output voltage to provide a second current that mirrors the first current;
- and
- a first resistive element configured to receive the second current to provide a temperature dependent voltage and a voltage versus temperature slope of the temperature dependent voltage, wherein a voltage level of the temperature dependent voltage is based on the constant current.
4 more elements
A random access memory comprising:
- means for providing a temperature dependent current;
- means for providing a current to establish a voltage level of a temperature dependent voltage;
- means for mirroring the current and the temperature dependent current to provide the temperature dependent voltage;
- and
- means for establishing a voltage versus temperature slope of the temperature dependent voltage.
2 more elements
A method for providing a temperature dependent voltage comprising:
- providing a temperature dependent current;
- providing a current;
- mirroring the current and the temperature dependent current to provide the temperature dependent voltage;
- establishing a voltage versus temperature slope of the temperature dependent voltage;
- and
- establishing a voltage level of the temperature dependent voltage.
3 more elements
A method for providing a temperature dependent output voltage in a random access memory, comprising:
- receiving a temperature dependent current;
- receiving a constant current;
- combining the temperature dependent current and the constant current;
- mirroring the combined current;
- receiving the mirrored current at a resistor to provide a voltage level of a temperature dependent reference voltage based on the constant current and to establish a voltage versus temperature slope of the temperature dependent reference voltage.
2 more elements
A method for providing a temperature dependent voltage comprising:
- receiving a temperature dependent current;
- receiving a constant current;
- receiving a first constant voltage at a differential amplifier to provide an output voltage;
- receiving the output voltage at a first transistor to provide a second constant voltage and a first current comprising the temperature dependent current and the constant current;
- receiving the output voltage at a second transistor to provide a second current that mirrors the first current;
- and
- receiving the second current at a first resistive element to provide a temperature dependent voltage and a voltage versus temperature slope of the temperature dependent voltage and to establish a voltage level of the temperature dependent voltage based on the constant current.
4 more elements
Dependencies are inferred from the claim text.