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US 9,435,834 B2Granted
Voltage monitoring circuit
AssigneeCree, Inc.
InventorsPierre Deschenes, Bin Du
Life of this patent
Estimating the term…
Abstract
A voltage monitoring circuit includes a line monitoring circuit configured to receive an AC line voltage and generate an output voltage in response to the AC line voltage exceeding a threshold voltage, and a rectifier circuit coupled to the line monitor circuit and configured to receive the output voltage from the line monitoring circuit generate a rectified voltage signal in response to the output voltage.
Claims19
A voltage monitoring circuit, comprising:
- a line monitoring circuit configured to receive an AC line voltage signal and generate an output voltage signal in response to an amplitude of the AC line voltage signal exceeding a threshold voltage;
- a rectifier circuit coupled to the line monitor circuit, and configured to receive the output voltage from the line monitoring circuit and generate a rectified voltage signal in response to the output voltage signal;
- and
- an indicator circuit coupled to the rectifier circuit and configured to receive the rectified voltage signal, wherein the indicator circuit is configured to generate an indicator signal in response to the rectified voltage signal wherein the indicator signal is indicative of the amplitude of the AC line voltage signal falling below the threshold voltage.
1 more element
A voltage monitoring circuit, comprising:
- a line monitoring circuit configured to receive an AC line voltage signal and generate an output voltage signal in response to an amplitude of the AC line voltage signal exceeding a threshold voltage;
- a rectifier circuit coupled to the line monitor circuit and configured to receive the output voltage from the line monitoring circuit and generate a rectified voltage signal in response to the output voltage signal;
- an indicator circuit coupled to the rectifier circuit and configured to receive the rectified voltage signal wherein the indicator circuit is configured to generate an indicator signal in response to the rectified voltage signal;
- and
- a neutral monitoring circuit coupled to the indicator circuit and to a neutral line and a ground line and configured to monitor a voltage level of the neutral line relative to the ground line.
2 more elements
A voltage monitoring circuit, comprising:
- a line monitoring circuit including a DIAC coupled to an AC voltage supply line and configured generate an output voltage signal in response to an amplitude of an AC line voltage signal on the AC voltage supply line exceeding a predetermined threshold voltage;
- a rectifier circuit coupled to the line monitor circuit and configured to receive the output voltage signal from the line monitoring circuit generate a rectified voltage signal in response to the output voltage signal;
- an indicator circuit including a solid state relay coupled to the rectifier circuit and configured to receive the rectified voltage signal, wherein the indicator circuit is configured to generate an indicator signal in response to the rectified voltage signal being applied to an input of the solid state relay;
- and
- a neutral monitoring circuit coupled the indicator circuit, wherein the neutral monitoring circuit and the indicator circuit are configured to generate a second indicator signal in response to a voltage on a neutral line being greater than a ground voltage.
2 more elements
A voltage monitoring circuit, comprising:
- a line monitoring circuit configured to receive an AC line voltage signal and generate an output voltage signal in response to an amplitude of the AC line voltage signal exceeding a threshold voltage;
- and
- a rectifier circuit coupled to the line monitor circuit and configured to receive the output voltage signal from the line monitoring circuit and generate a rectified voltage signal in response to the output voltage signal;
- an indicator circuit coupled to the rectifier circuit and configured to receive the rectified voltage signal, wherein the indicator circuit is configured to generate an indicator signal in response to the rectified voltage signal;
- and
- a lower limit monitoring circuit and an upper limit monitoring circuit coupled to the indicator circuit, wherein the lower limit monitoring circuit is configured to cause the indicator circuit to generate a first indicator signal when the amplitude of the AC line voltage signal exceeds a first voltage threshold, and wherein the upper limit monitoring circuit is configured to cause the indicator circuit to generate a second indicator signal when the amplitude of the AC line voltage signal exceeds a second voltage threshold.
3 more elements
Dependencies are inferred from the claim text.