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US 2006/0232257 A1Published application
Voltage sense circuit and method therefor
AssigneeSemiconductor Components Industries, LLC
InventorPetr Kadanka
Life of this patent
Estimating the term…
Abstract
In one embodiment, a voltage sense circuit receives an ac input signal and forms a rectified output voltage that is representative of the ac input signal.
Claims19
A voltage sense circuit comprising:
- a voltage input terminal;
- a voltage return terminal;
- a first input and a second input coupled to receive an ac input signal;
- a first current mirror coupled to the first input to convert the ac input signal to a first current that is representative of the ac input signal;
- a second current mirror coupled to the second input to convert the ac input signal to a second current that is representative of the ac input signal;
- a summing node coupled to sum the first current with the second current and form a third current;
- a rectifier coupled to receive the third current and form a rectified current that is representative of the ac input signal;
- and
- an output of the voltage sense circuit configured to convert the rectified current to a rectified voltage that is representative of the ac input signal.
6 more elements
A method of forming a voltage sense circuit comprising:
- configuring a first input to form a first current that is representative of an ac input signal;
- configuring the voltage sense circuit to convert the first current to a second current that is representative of the first current;
- configuring a second input to form a third current that is representative of the ac input signal;
- configuring the voltage sense circuit to convert the third current to a fourth current that is representative of the third current;
- and
- configuring the voltage sense circuit to sum the second current and the fourth current as a fifth current and couple the fifth current for conversion to a rectified output voltage having a value that is representative of a value of the ac input signal.
3 more elements
A voltage sense method comprising:
- coupling an ac input signal to a first input and a second input of a voltage sense circuit;
- clamping the first input to a first voltage to convert the ac input signal to a first current;
- clamping the second input to a second voltage to convert the ac input signal to a second current;
- summing the first current and the second current to form a third current that is representative of the ac input signal;
- converting the third current to a fourth current having a haversine waveform that is representative of the ac input signal;
- and
- converting the fourth current to a haversine voltage that is representative of the ac input signal.
4 more elements
Dependencies are inferred from the claim text.