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# 電子電路代寫 | ECE171 rev 2 Homework Assignment-3

### 電子電路代寫 | ECE171 rev 2 Homework Assignment-3

1. Show that the diode is a non-linear device by analytically proving that superposition fails, and create an example
that clearly demonstrates this.

The following problems deal with circuits using op-amps to realize “ideal rectifiers” or “superdiodes”.

These improve
upon the basic op-amp circuit first shown in Fig. 4.29 (pg. 220) and discussed later in section 18.9.1 when more
advanced circuits are discussed. This is a chance for you to apply some of your op-amp knowledge to sophisticated
non-linear circuits. 4.3 and 4.4 are exercise problems, so they have answers. The objective is not to “get the right

3. Do Exercise problem 18.29 on page 1818 (bonus pg. 3-72).

Compare these two circuits, explaining what makes them “superdiodes” and why the second one is superior to
the first.

Note: A textbook reference for section 18.9 containing 18.29 and 18.30 is included at the end of this homework.

5. Consider the following equivalent circuit employing a silicon signal diode to be used in a small-signal
application.

a) Find an expression for this circuit’s high-pass -3dB corner frequency. Assume the diode has an ideality factor
n=2,
1 Rk ?

b) From your results for (a), design the circuit by finding a value for C such that
3 100 dB f Hz ? ?
if the diode’s
bias current can be adjusted anywhere between
10 A ?
and
1mA
. Indicate what the actual corner frequencies
are for the two current extremes. #### 在線客服  Essay_Cheery  