Voltage dividing circuit and magnetic sensor circuit

Details Voltage dividing circuit and magnetic sensor circuit Voltage dividing circuit and magnetic sensor circuit

2011-06-07

2011-06-07

Zhang, Jue (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

C324S251000, C324S252000

Reexamination Certificate

active

07956598

ABSTRACT:
To provide a variable voltage dividing circuit capable of changing voltage values of a detection point and a release point along with a change in power supply voltage without changing a hysteresis width. The variable voltage dividing circuit according to the present invention includes: a voltage dividing unit which includes a resistor string formed of a plurality of resistors connected in series, and outputs divided voltages divided at connection points of the plurality of resistors, one end of the resistor string being applied with a first voltage, another end thereof being applied with a second voltage; a first constant current source connected to a first connection point of the resistor string; and a second constant current source connected to a second connection point located symmetrically to the first connection point with respect to a center of the resistor string in the resistor string, in which, in accordance with a voltage difference between the first voltage and the second voltage, any one of the first constant current source and the second constant current source subtracts a first adjustment current from a current flowing through the resistor string, and another thereof feeds a second adjustment current to the resistor string.

REFERENCES:
patent: 4857841 (1989-08-01), Hastings et al.
patent: 6118262 (2000-09-01), Suzuki
patent: 9-166405 (1997-06-01), None
patent: 10-268253 (1998-10-01), None

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