Current stabilizing circuit
First Claim
Patent Images
1. A circuit comprising:
- an inductor having a first terminal for connecting to a current source and a second terminal for connecting to a load to conduct a first current from the current source to the load, the inductor producing a voltage drop related to a change in the first current; and
current driving means coupled to the inductor for providing a second current to the load responsive to the voltage drop whereby the first current is maintained at a substantially constant current magnitude.
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Abstract
A circuit topology useable in a battery impedance tester to latch a source current to a constant magnitude includes an inductor, a comparator, a driver and a storage capacitor. The inductor is connected in series with a current path between a source and a load. The inductor produces a voltage drop that changes with current drawn by the load. Responsive to the voltage drop, the driver provides the load with current supplied from the storage capacitor. The current provided by the driver returns the source current to the constant magnitude.
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Citations
13 Claims
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1. A circuit comprising:
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an inductor having a first terminal for connecting to a current source and a second terminal for connecting to a load to conduct a first current from the current source to the load, the inductor producing a voltage drop related to a change in the first current; and current driving means coupled to the inductor for providing a second current to the load responsive to the voltage drop whereby the first current is maintained at a substantially constant current magnitude. - View Dependent Claims (2, 3, 4, 5)
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6. A circuit for maintaining a constant current through a current path, comprising:
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an inductor connected in series with a current path between a current source and a load, the inductor having a first terminal coupled to the current source and a second terminal coupled to the load; a storage capacitor; and a driver coupled to the inductor and connected to the capacitor, the driver being supplied by the storage capacitor to drive the load with an additional current related to a voltage drop between the terminals of the inductor such that the current through the current path is maintained substantially constant. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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Specification