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LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset
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... Note 2: Short circuits from the output to V+ can cause excessive heating and eventual destruction. When considering short circuits to ground, the maximum output current is approximately 20 mA independent of the magnitude of V+. Note 3: This input current will only exist when the voltage at any of th ...
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LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset
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... HERIC topologyare taken as examples for analysis. There are four operationmodes in each period of the utility grid of the H5 topology, asshown in Fig. 3. It can be seen that in the active modes, theinductor current of H5 topology is always flowing through threeswitches due to its extra switch S5 in ...
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... and windage losses. Therefore, the armature current Ia is small and the back e.m.f. Is nearly equal to the applied voltage. (ii) If the motor is suddenly loaded, the firest effect is to cause the armature to slow down. Therefore, the speed at which the armature conductors move throug the field is re ...
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Current source



A current source is an electronic circuit that delivers or absorbs an electric current which is independent of the voltage across it.A current source is the dual of a voltage source. The term constant-current 'sink' is sometimes used for sources fed from a negative voltage supply. Figure 1 shows the schematic symbol for an ideal current source, driving a resistor load. There are two types - an independent current source (or sink) delivers a constant current. A dependent current source delivers a current which is proportional to some other voltage or current in the circuit.
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