Universal power supply monitor circuit
First Claim
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1. A power supply monitor circuit for operating in a plurality of modes, comprising:
- means coupled to first and second inputs of the monitor circuit for sensing the voltage levels applied thereat;
reference means for generating a reference voltage at a first output; and
programming means coupled to said means and being responsive to a signal applied at a third input of the monitor circuit for providing the selection of said plurality of modes and for providing second and third output signals at respective outputs of the monitor circuit which are a function of the voltage levels appearing at said first and second inputs.
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Abstract
A power supply monitoring circuit for operating in a plurality of modes comprising first and second single input comparators coupled to first and second inputs, respectively, for sensing the voltage levels thereof. A reference circuit for generating a reference voltage at a first output. A programming circuit coupled to the outputs of the first and second single input comparators and being responsive to a third input for providing the selection of plurality of operation modes and for providing second and third outputs which are function of the voltage levels appearing at the first and second inputs.
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Citations
9 Claims
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1. A power supply monitor circuit for operating in a plurality of modes, comprising:
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means coupled to first and second inputs of the monitor circuit for sensing the voltage levels applied thereat; reference means for generating a reference voltage at a first output; and programming means coupled to said means and being responsive to a signal applied at a third input of the monitor circuit for providing the selection of said plurality of modes and for providing second and third output signals at respective outputs of the monitor circuit which are a function of the voltage levels appearing at said first and second inputs. - View Dependent Claims (2, 3)
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4. In an integrated circuit, a power supply monitor circuit for operating in a plurality of modes, comprising:
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means coupled to first and second pins of the monitor circuit for sensing the voltage levels thereof; reference means for generating a reference voltage at a third pin of the monitor circuit; and programming means coupled to said means and being responsive to a voltage signal applied at a fourth pin of the monitor circuit for providing the selection of said plurality of modes, said programming means provides outputs at fifth and sixth pins of the monitor circuit which are a function of the voltage levels appearing at said first and second pins of the monitor circuit. - View Dependent Claims (5, 6)
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7. An integrated power supply monitor circuit in an 8-pin package having a power supply pin and a ground pin, for operating in a plurality of modes, comprising:
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means coupled to first and second pins of the integrated power supply monitor circuit for sensing the voltage levels thereof; reference means coupled to the power supply pin of the integrated power supply monitor circuit for generating a reference voltage at a third pin of the integrated power supply monitor circuit; and programming means coupled to said means and being responsive to a voltage signal applied at a fourth pin of the integrated power supply monitor circuit for providing the selection of said plurality of modes and for providing outputs at fifth and sixth pins of the integrated power supply monitor circuit which are a function of the voltage levels appearing at said first and second pins of the integrated power supply monitor circuit. - View Dependent Claims (8, 9)
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Specification