Prob. B.2: Consider the circuit shown in Fig. 4 where R-2K and C-0.667 pF. Then a. The frequency of the oscillation at the output is C- b. The frequency and the duty cycle of 0 to get an output of 4 pulses ON and 3 pulses OFF are: D.R.-> c. Draw the waveform of ve and v, for the above case. wwwwww Fig. 4 Preb. B3: Neglecting the base currents in the circuit shown in Fig. 5. a. Determine Rez such that ₂--1 V when Q₂ is ON and Q, is OFF. b. For v--0.7, determine Rer such that v, --1 V. c. Find For and Voz for ()--0.7 V. a. Rc- c. (1) VOI- -42V Fig. 5 Voz" Freb. B4: Consider the CMOS logic circuit shown in Fig. 6. a. What is the logic function performed by the circuit? Y- 44 (ii) Vo GI NMOS Fig. 6 b. Rct input and output (ii) -1.7 V. Vo₂= The designed NMOS network Preb. BS Consider the R2R ladder 4-bits D/A converter circuit shown below where Vsr-115V, V-4V, R₂- 20KC2, and R-10KT2. Find b. Design the NMOS network. a the output voltage for digital inputs 0010, 0101, and 1011. b. the minimum value of R and get correct integer output representation for the digital input Digital input 0010 0101 1011 Output voltage

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Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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circuits, pleaseeeee solve questionnn B:4
Fig. 1 shows an oscillator circuit using 555 timer, with RA = 1.5KQ, RB =
2.5KQ Vcc= 12 V, and C= 0.7215uF. Assume the diode is ideal, then
1
2
3
If the diode is disconnected, then
4
5
6
The charging time (T,) (in ms)
The duty cycle (ratio)
The frequency of the output signal (in Hz)
10
16
The discharging time (T₂) (in ms)
The duty cycle (ratio)
The frequency of the output signal (in Hz)
V R₁
RA
RB
11
+Vcc
Discharge
Threshold
Trigger
Ground
D,
Fig 3
Reset
555 Output
+12
5-12
+Vcc
45
vo
VEE
A
1.25
0.375
666.7
The minimum output voltage
Draw to scale the transfer characteristics.
Draw to scale the input and the output signals when Vin is a triangle wave of 8 Vp-p
1.5
0.615
500
Voltage transfer c/c
ww
RE
VER
Fig. 1
Fig. 2
Consider the sweep generator circuit shown in Fig. 2 where RE = 4KS2, RB = 4.7K2, VEE=30.7V, VBB= 20V, and C= 0.5 uF.
The control signal (v) has a pulse duration of 0.5ms, a frequency of 500Hz, and a +12V amplitude. Then
7
2.5
3.5
8
9
The emitter current I (in mA)
The charging time of the capacitor (in ms)
2.5
The peak voltage of the capacitor (Vp)
6.0
The minimum value of Rg that we can use and still obtain a linear sweep 1.5
waveform (in K2)
Consider a Schmitt trigger circuit with ± VSAT = 12 V, Vur=4V, and Vir=0 V. This circuit is modified to be an oscillator
circuit by adding C= 3.46 µF and R=2 KS2. Then
11 The charging time (Tch) of this circuit (in msec) is
2.8
12 The discharging time (Tdisch) of this circuit ( in msec ) is
3.0
Consider the circuit shown in Fig. 3 where Vzi = 3.3V, VA= 4.3V, and ± VSAT = ±12 V. Then
13 The maximum output voltage
4.0
5.0
14
-4.0
- 5.0
15
B
C
0.5
1.0
0.667 0.333
307.8
500
1.4
4.0
1.75
0.6
307.7
1.25
0.5
400
2.0
3.0
10.5
1.8
282
1.5
9.0
1.2
4.2
1.0
D
0.75
0.5
400
1.0
0.75
666.7
R₂
12
-0.7
LI
3.0
2.0
7.5
2.1
199
5.6
2.0
Your
ans.
0.7
- 12
input and output
Transcribed Image Text:Fig. 1 shows an oscillator circuit using 555 timer, with RA = 1.5KQ, RB = 2.5KQ Vcc= 12 V, and C= 0.7215uF. Assume the diode is ideal, then 1 2 3 If the diode is disconnected, then 4 5 6 The charging time (T,) (in ms) The duty cycle (ratio) The frequency of the output signal (in Hz) 10 16 The discharging time (T₂) (in ms) The duty cycle (ratio) The frequency of the output signal (in Hz) V R₁ RA RB 11 +Vcc Discharge Threshold Trigger Ground D, Fig 3 Reset 555 Output +12 5-12 +Vcc 45 vo VEE A 1.25 0.375 666.7 The minimum output voltage Draw to scale the transfer characteristics. Draw to scale the input and the output signals when Vin is a triangle wave of 8 Vp-p 1.5 0.615 500 Voltage transfer c/c ww RE VER Fig. 1 Fig. 2 Consider the sweep generator circuit shown in Fig. 2 where RE = 4KS2, RB = 4.7K2, VEE=30.7V, VBB= 20V, and C= 0.5 uF. The control signal (v) has a pulse duration of 0.5ms, a frequency of 500Hz, and a +12V amplitude. Then 7 2.5 3.5 8 9 The emitter current I (in mA) The charging time of the capacitor (in ms) 2.5 The peak voltage of the capacitor (Vp) 6.0 The minimum value of Rg that we can use and still obtain a linear sweep 1.5 waveform (in K2) Consider a Schmitt trigger circuit with ± VSAT = 12 V, Vur=4V, and Vir=0 V. This circuit is modified to be an oscillator circuit by adding C= 3.46 µF and R=2 KS2. Then 11 The charging time (Tch) of this circuit (in msec) is 2.8 12 The discharging time (Tdisch) of this circuit ( in msec ) is 3.0 Consider the circuit shown in Fig. 3 where Vzi = 3.3V, VA= 4.3V, and ± VSAT = ±12 V. Then 13 The maximum output voltage 4.0 5.0 14 -4.0 - 5.0 15 B C 0.5 1.0 0.667 0.333 307.8 500 1.4 4.0 1.75 0.6 307.7 1.25 0.5 400 2.0 3.0 10.5 1.8 282 1.5 9.0 1.2 4.2 1.0 D 0.75 0.5 400 1.0 0.75 666.7 R₂ 12 -0.7 LI 3.0 2.0 7.5 2.1 199 5.6 2.0 Your ans. 0.7 - 12 input and output
Prob. B.2: Consider the circuit shown in Fig. 4 where R-2K and C-0.667 pF. Then
a. The frequency of the oscillation at the output is
C-
b. The frequency and the duty cycle of Vf0 to get an output of 4 pulses ON and 3 pulses OFF are:
(-.
D.R. -
c. Draw the waveform of ve and v, for the above case.
wwwww
HH
Fig. 4
Prob. B3: Neglecting the base currents in the circuit shown in Fig. 5.
a. Determine Rez such that v₂-1 V when Q₂ is ON and Q₁ is OFF.
b. For v=-0.7, determine Re, such that v, --1 V.
c. Find Vos and Voz for
(1)--0.7 V.
a. Rez-
c. (1) VOI-
34.
777
421
AL GI
-010
Van'
wwwwww
(ii) Voi
41
041
Fig. 5
Preb. B.4: Consider the CMOS logic circuit shown in Fig. 6.
a. What is the logic function performed by the circuit?
Y-
Veo-33V
NMOS
Network
b. Rc-
Fig. 6
input and output
(ii) V-1.7 V.
Prob. B.S: Consider the R/2R ladder 4-bits D/A converter circuit shown below where Vsr-115V, V-4V, R,-
20KC2, and R-10KT2. Find
Vo₂=
a the output voltage for digital inputs 0010, 0101, and 1011.
b. the minimum value of R and still get correct integer output representation for the digital input.
The designed NMOS network
b. Design the NMOS network.
b. R-
Digital input
0010
0101
1011
Output voltage
Transcribed Image Text:Prob. B.2: Consider the circuit shown in Fig. 4 where R-2K and C-0.667 pF. Then a. The frequency of the oscillation at the output is C- b. The frequency and the duty cycle of Vf0 to get an output of 4 pulses ON and 3 pulses OFF are: (-. D.R. - c. Draw the waveform of ve and v, for the above case. wwwww HH Fig. 4 Prob. B3: Neglecting the base currents in the circuit shown in Fig. 5. a. Determine Rez such that v₂-1 V when Q₂ is ON and Q₁ is OFF. b. For v=-0.7, determine Re, such that v, --1 V. c. Find Vos and Voz for (1)--0.7 V. a. Rez- c. (1) VOI- 34. 777 421 AL GI -010 Van' wwwwww (ii) Voi 41 041 Fig. 5 Preb. B.4: Consider the CMOS logic circuit shown in Fig. 6. a. What is the logic function performed by the circuit? Y- Veo-33V NMOS Network b. Rc- Fig. 6 input and output (ii) V-1.7 V. Prob. B.S: Consider the R/2R ladder 4-bits D/A converter circuit shown below where Vsr-115V, V-4V, R,- 20KC2, and R-10KT2. Find Vo₂= a the output voltage for digital inputs 0010, 0101, and 1011. b. the minimum value of R and still get correct integer output representation for the digital input. The designed NMOS network b. Design the NMOS network. b. R- Digital input 0010 0101 1011 Output voltage
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