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11 351 ADC, DAC, op-amps, cont, pre

11 351 ADC, DAC, op-amps, cont, pre - Back to Op Amp...

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1 1 Back to Op Amp Circuits 2 ( ) ( ) ( ) ( ) ( ) ( ) ( ) 2 0 1 1 2 2 0 1 2 2 1 2 1 2 2 1 2 1 1 2 2 2 2 1 2 2 2 1 2 1 1 1 2 2 2 2 1 2 2 2 1 2 1 1 2 1 1 1 2 1 1 2 2 2 1 1 1 1 i i i i i i i i i i i i i i R E E E E R R R E E E E E R / R R E E R / R R R R R R E R / R R E R / R R E R R R R R R R R R E E E E R R R R R R R R R R E E R R = = = + + = + + + ⎤ ⎛ ⎞⎛ + = + = ⎟⎜ + + ⎦ ⎝ ⎠⎝ = = ( ) 2 2 1 1 i i R E E R Example: differential amplifier 2 2 1 2 i R E E R R + = + E E + = R 2 R 1 ( ) 2 0 2 1 1 i i R E E E R = note the typos in Figliola & Beasley 0 1 2 2 1 i E E E E I R R = = I 2 Figliola & Beasley Figure 6.20c Discussion: E o in terms of E i s? No current into/from “-” terminal I 2 Op Amp Circuits: Differential Amplifier
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