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hw+2+2011

# hw+2+2011 - assumption 4 V R=0.1k R=0.1k R=0.1k 4 Diode...

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EECS 70B Spring 2011 Due date: Wed, Week 3 Homework 2 1. Difference Amplifier. Referring to the difference Op Amp shown below (also in Table 5.3 of the Text), express v o (t) in terms of v 1 (t) and v 2 (t) if R 1 =R 2 = R. + - O U T U 1 O P A M P V o 0 R1 R1 R2 R2 V1 V2 2. Finding Impedance: The current and voltage waveforms taken from an oscilloscope for an unknown device is shown below: 0 . 5 1 . 0 1 . 5 2 . 0 Estimate the frequency (Hz) and the impedance (expressed in polar form) of this unknown device at this frequency from this graph. 3. Diode Circuit*: Find the current I in the following circuit using the simple abrupt 0.7V rectifier model for the diode. To start the calculation, assume each diode is either ON or OFF and then check out to see if the calculated results are consistent with your

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Unformatted text preview: assumption. 4 V R=0.1k R=0.1k R=0.1k 4. Diode Circuit: Find Vo for the following diode circuit. Use the abrupt ON/OFF model with V f =0.7V for the diode. (R1=1k Ω and R2=1k Ω ). Find Vo if the current source is changed from 10 mA to 0.5mA. 1 0 m A _ + V o u t R 2 R 1 5. Temperature Sensor using Diode: The temperature-dependent IV characteristics of a diode can be used for temperature sensing. Consider the following circuit. V in is set at -5 Volt. From KVL at the inverting input terminal of the Op Amp and by using the diode equation / ( ) (e 1) D qV kT D s I V I =-for current through the diode, find an expression for V out . O U T 1 + 3-2 V + 4 V -1 1 R 1 1 k D 3 V i n V o u t I...
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hw+2+2011 - assumption 4 V R=0.1k R=0.1k R=0.1k 4 Diode...

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