If the diode is disconnected, then 4 The discharging time (7₂) (in ms)
If the diode is disconnected, then 4 The discharging time (7₂) (in ms)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Question
please quickly, solve question4
![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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5f89659e-c51d-4d78-99ad-e4a6e7daf89f%2Fae20f95e-f8be-4887-b5cd-2284de220597%2F2jh9cl7_processed.jpeg&w=3840&q=75)
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
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