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Medical (In English) Instrumentation#5

Medical (In English) Instrumentation#5. <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. Contents. (1) Thévenin's theorem and Norton’s theorem (2) Loading Effect (In OP AMP circuit)

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Medical (In English) Instrumentation#5

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  1. Medical(In English)Instrumentation#5 <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

  2. Contents (1) Thévenin's theorem andNorton’s theorem (2) Loading Effect (In OP AMP circuit) -Ex)Voltage source -Ex)Current source (3) Load

  3. Thévenin's theorem and Norton’s theorem • 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)

  4. The Thévenin equivalent circuit • VAB= 7.5V = Vth • R1 || (R2+R3) = 2kΩ = Rth

  5. The Norton equivalent circuit • Vth/Rth = 3.75mA

  6. Loading Effect. The gain of an amplifier generally depends on its source and load terminations, so-called loading effects that reduce the gain.

  7. VoltageSource ※

  8. Ex)CurrentSource ※Loading Effect

  9. Load 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 VL IL Vs=10V 1MΩ 10V 10uA 1kΩ 10V 10mA 10Ω 10V 1A 1Ω 1V 10A 10W power consumed Imax=1A Overload Imax=1A

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