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<1>2004200467 Jin-ho Cho <2>2007102861 Jeong-min Cho <3>2007102860 Eun-jin Cho <4>2007101329 Song-hee Cha <5>2003202089 Sun-woong Jin (1) Thévenin's theorem and Norton’s theorem (2) Loading Effect (In OP AMP circuit) -Ex)Voltage source -Ex)Current source (3) Load In electrical circuit theory, Thévenin's theorem(or Norton) for linear electrical networks states that any combination of voltage sources, current sources and resistors with two terminals is electrically equivalent to a single voltage source V(or current source) and a single series resistor R Ex) VAB= 7.5V = Vth R1 || (R2+R3) = 2kΩ = Rth Vth/Rth = 3.75mA The gain of an amplifier generally depends on its source and load terminations, so-called loading effects that reduce the gain. ※ ※Loading Effect If an electric circuit has a well-defined output terminal, the circuit connected to this terminal is the load. The term 'load' also refer to the power consumed by a circuit IL RL Vs=10V 10W power consumed IL 1MΩ 10V 10uA 1kΩ 10V 10mA 10Ω 10V 1A 1V 10A 1Ω Imax=1A VL Overload Imax=1A
