Quiz1 Gen
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14 Terms
Biopotentials
ECG, EEG, EMG, EOG
Measuring biopotential step 1
measure voltage difference (achieve high “common mode rejection ratio”)
Measuring biopotential step 2
high input impedance (measure without drawing current from what you’re measuring)
Measuring biopotential step 3
need to filter signal (~60 Hz); should be one line
Measuring biopotential step 4
need “high” gain
Golden-rule 1 of op-amps
Va = Vb
Golden-rule 2 of op-amps
i1= i2 = 0
What happens when Vb is grounded in inverter circuit
There is no current or voltage drop so Va also equals 0
Ohm’s Law
V=iR
Inverter Circuit value of i
(V+)-(V-)/ R
Inverter Circuit Kirchoffs Current Law eq
Vo = - (R2/R1) * Vi
Kirchoffs Current Law
Cant have current created or destroyed
Voltage follower in/output
Vo = Vi (doesn’t invert & no gain)
Voltage followers
Va = Vb = Vo
Note 
Flashcards (29)