lecture1(Op) - 1. Signal Processing in Sensors 1. We need...

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1 Page 1 We need signal processing because: Too small Too noisy due to electromagnetic interference Having the wrong information because of faulty design Having a DC offset because of static errors Signal processing is classified into two types: Analog signal processing Digital signal processing 1. Signal Processing in Sensors 1. Signal Processing in Sensors
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2 Page 2 At V 1 and V 2 , the input impedance of the Op Amp is infinite. That is zero current flowing through the Op Amp The voltage level at both input locations is equal. Operational Amplifiers Operational Amplifiers - + V o V 1 V 2
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3 Page 3 As building blocks for: Amplifiers Integrators Summers Differentiators Comparators A/D and D/A converters Active filters Sample and hold amplifiers Op Amp Circuits Op Amp Circuits
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4 Page 4 Inverting Amplifiers Inverting Amplifiers in F out V R R V - =
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5 Page 5 Non-inverting Amplifier Non-inverting Amplifier in F out V R R 1 V + =
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6 Page 6 Buffer or Follower Buffer or Follower Put R F = 0 then V out = V in
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7 Page 7 Summing Amplifiers Summing Amplifiers ( 29 2 1 V V V out + - =
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8 Page 8 Integrating Amplifiers Integrating Amplifiers τ τ - = t 0 in out d ) ( V RC 1 V
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9 Page 9 Differentiating Amplifiers Differentiating Amplifiers dt dV RC V in out - =
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lecture1(Op) - 1. Signal Processing in Sensors 1. We need...

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