Systems and methods for reducing high order hall plate sensitivity temperature coefficients
First Claim
1. A circuit comprising:
- a first amplifier to receive a first reference voltage generated in conjunction with a proportional to absolute temperature (PTAT) device, the first amplifier having a first output node;
a second amplifier to receive a second reference voltage generated in conjunction with a complementary to absolute temperature (CTAT) device, the second amplifier having a second output node;
a plurality of resistors disposed in a signal path between the first output node and the second output node, the plurality of resistors having at least one resistor tap;
at least one voltage-to-current converter coupled to the at least one resistor tap, the at least one voltage-to-current converter to generate a respective at least one current signal; and
a third amplifier, the third amplifier coupled to the at least one current signal, the at least one current signal operable to apply a multiplication factor or a division divisor to the third amplifier.
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Abstract
The systems and methods described can reduce high order temperature coefficients on the Hall plate sensitivity. A temperature coefficient circuit may include a first amplifier to receive a first reference voltage generated in conjunction with a proportional to absolute temperature (PTAT) device and a second amplifier to receive a second reference voltage generated in conjunction with a complementary to absolute temperature (CTAT) device, the second amplifier having a second output node. A plurality of resistors may be disposed in a signal path between output node of the first amplifier and an output node of the second amplifier. The plurality of resistors may be coupled to at least one voltage-to-current converter through one or more resistors taps. The voltage-to-current converter may generate at least one current signal that can be operable to apply a multiplication factor or a division divisor to an amplifier coupled to the voltage-to-current converter.
177 Citations
20 Claims
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1. A circuit comprising:
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a first amplifier to receive a first reference voltage generated in conjunction with a proportional to absolute temperature (PTAT) device, the first amplifier having a first output node; a second amplifier to receive a second reference voltage generated in conjunction with a complementary to absolute temperature (CTAT) device, the second amplifier having a second output node; a plurality of resistors disposed in a signal path between the first output node and the second output node, the plurality of resistors having at least one resistor tap; at least one voltage-to-current converter coupled to the at least one resistor tap, the at least one voltage-to-current converter to generate a respective at least one current signal; and a third amplifier, the third amplifier coupled to the at least one current signal, the at least one current signal operable to apply a multiplication factor or a division divisor to the third amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A circuit comprising:
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a first amplifier to receive a first reference voltage generated in conjunction with a first device, the first amplifier having a first output node; a second amplifier to receive a second reference voltage generated in conjunction with a second device, the second amplifier having a second output node; a plurality of resistors disposed in a signal path between the first output node and the second output node, the plurality of resistors having at least one resistor tap; at least one voltage-to-current converter coupled to the at least one resistor tap, the at least one voltage-to-current converter to generate a respective at least one current signal; and a third amplifier, the third amplifier coupled to the at least one current signal, the at least one current signal operable to apply a multiplication factor or a division divisor to the third amplifier. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A circuit comprising
a first amplifier to receive a first reference voltage generated in conjunction with a first device, the first amplifier having a first output node; -
a second amplifier to receive a second reference voltage generated in conjunction with a second device, the second amplifier having a second output node; a plurality of resistors disposed in a signal path between the first output node and the second output node, the plurality of resistors having at least one resistor tap; and at least one voltage-to-current converter coupled to the at least one resistor tap, the at least one voltage-to-current converter to generate a respective at least one current signal. - View Dependent Claims (20)
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Specification