ECE 201 Lecture 10 Borja Peleato Source transformations 1 Source combinations Voltage sources connected in series add up their voltages Current sources connected in parallel add up their currents DANGER Voltage sources connected in parallel or current sources connected in series If they are equal they help each other and last twice as long If they have different values lab burns not really because they have internal resistances but sparks usually come out 2 Source transformation The following two are equivalent If we put them both inside black boxes we will never be able to tell which is which If we short circuit A and B they both output Is amperes and 0 voltage obviously If we put a resistor Ro between A and B they both output Vs R Ro amperes and 3 Example 4 Dependent sources The same transformation principle applies to dependent sources 5
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