Unformatted Attachment Preview
Available standard capacitor values
(avoid using small capacitance values, say less than 220pF)
Hilitchi Monolithic Hilitchi Mylar
Multilayer Ceramic Polyester Film
Capacitor
Capacitor
Assortment Kit Assortment Kit
HCC525
HPFC-700
CERAMIC DISC
CAPACITOR
COMPONENT
KIT
Hilitchi Monolithic
Multilayer Ceramic
Capacitor
Assortment Kit
HDR-550
OCR Ceramic
Capacitor
Assortment Kit
10pF
22pF
47pF
100pF
470pF
0.001uF
0.022uF
0.047uF
0.01uF
0.1uF
0.1uF
0.15uF
0.22uF
0.33uF
0.47uF
0.68uF
1uF
2.2uF
4.7uF
10uF
10pF
20pF
30pF
47pF
56pF
68pF
100pF
220pF
330pF
680pF
1nF
4.7nF
10nF
47nF
100nF
0.22nF
0.33nF
0.47nF
0.56nF
0.68nF
InF
2.2nF
2.7nF
3.3nF
3.9nF
4.7nF
6.8nF
10nF
15nF
22nF
33nF
39nF
47nF
68nF
82nF
100nF
150nF
220nF
470nF
Available standard resistor values
10Ω, 47Ω, 100Ω, 150Ω, 220Ω, 270Ω, 330Ω, 390Ω, 470Ω, 680Ω, 1kΩ, 1.2kΩ, 1.5kΩ, 2kΩ,
2.2kΩ, 2.7kΩ, 3.3kΩ, 4.7kΩ, 5.1kΩ, 5.6kΩ, 10kΩ, 15kΩ, 20kΩ, 22kΩ, 33kΩ, 47kΩ, 100kΩ,
470kΩ, ΟΜΩ, 1ΟΜΩ
NOTE: Use LTspice to produce the Bode plots. Use a frequency range from 0.1fo to 10fo.
Place a copy of your pre-lab in your lab notebook, including the Bode plots.
Make sure that your pre-lab assignment meets the guidelines as outlined in section1.6.
Center frequency of fo
• Quality factor of Q
Gain at center frequency Tp
These equations will be useful during your work:
V. (S)
SR2C1
T(s)
Vi(S) 1+s(R1C1 +R2C2+R2C1)+s2 (R1 R2C1C2)
=
Wo =
R1 R2C1C2
R2C1
Tp =
R1C1+R2C2+R2C1
If
R2
fr
R1
and
fc
then
1
fr
Q-1 = frfc + +
frfc fc
Tp = Q R
fc
and
1_fr
Wo =
R2C1fc
1
frfc
R2C2
Note that
نامه دور
wo
T(jw) =
(Wo2-w2)+jwlºo)
The pre-lab must include the following (see note below):
1. Bode plots (magnitude and phase) for the response using your ideal component values (i.e.
without regard to available values). Show that these results meet all of the specifications
EXACTLY with zero error.
2. Bode plots (magnitude and phase) for the circuit response using available standard component
values. Demonstrate that these values provide an acceptable level of performance. It is YOUR
job to MEET the specifications as closely as possible. This may require several iterations of
choosing component values. You MUST use available resistor and capacitor values in your final
design. Do not use electrolytic capacitors.
Pre-Laboratory Assignment
(ONE PRE-LAB ASSIGNMENT PER GROUP
WORK TOGETHER)
Consider the circuit of Figure 1.
R1
C1
vo
179.355
0.1°F
+
R2
C2
vi
AC 1
316.759
0.1783uF
.ac dec 10000 1 1 MEG
Using LTspice (linear.com)
Figure 1. Passive Bandpass Filter
(values give a center frequency of fo 5kHz and are for illustrative purposes only)
Design this bandpass filter to meet the following specifications (exact values will be given in
class); that is, select parameters R1, R2, C1, and C2.