problem 2 150 in the figure shown below the transistor t is used as a
In the figure shown below, the transistor T, is used as a switch for the load resistance
The circuit data are the following: the voltage of the main de source,Vcc= 200.006/V/;
the voltage of the base de source, V₁= 3.5 /V/; the load resistance, R₁= 1.98006 /2/; and
the resistance of the base circuit, RB = 0.0625 /22/.
The values shown for the main de voltage source and the load resistance do not look
too realistic. The reason is to have the data of the shown circuit in agreement with
the waveforms that follow.
The switch is shown on the base circuit to model the control process that is present
on the base circuit.
For a cycle of the transistor operation, the waveforms for different quantities are
shown in the attached Figure 8-10. The length of different time intervals shown in
the figure is as follows:
ta = 0.5 /μs/;
t₁= 1 /µs/;
ts = 5 /µs/;
tf = 3 /us/.
It is also specified that the signal frequency is fs= 10 /kHz/ and that the duty cycle is
D = 50% (Here the duty cycle is defined as the ratio of the time length along which
the base signal is present to the total time length of a cycle. With the data shown in
Figure 8-10, the duty cycle is represented as: D /%/= ((ton+ tn)/T) x 100)./n200/vl
-3/V/ = V₁E(San
•T = 1/₂
Figure 8-10 Waveforms of transient switch./nFor the given circuit and its operation, calculate the value of:
a) The energy consumed (lost) within the transistor, due to the collector current
during the initial turn-on time-interval, that is, for 0 ≤t≤ta.
b) The same quantity as in a) during the final turn-on time-interval, that is,
for ta ≤ t ≤ton.
c) The same quantity as in a) during the full conduction time-interval, that is, for
ton ≤ t ≤ (ton + tn + ts).
d) The same quantity as in a) during the initial turn-off time-interval, that is, for
(ton + tn + ts) ≤t≤ (ton + tn + toff).
e) The same quantity as on a) during the full turn-off time interval, that is, for
(ton + tn + toff) ≤ t ≤ T.
f) The total energy and the corresponding average power consumed (lost) within
the transistor along an operation cycle, due to the collector current.
g) The energy and the corresponding average power supplied by the base voltage
source VB along an operating cycle. These correspond to the energy and the
average power consumed (lost) within the transistor and in the base circuit
h) The total energy and the corresponding average power consumed (lost) per
transistor, that is, due by both the collector and the base current, including the
energy and the corresponding average power lost in the base circuit resistance
i) For one cycle, the total energy and the corresponding average power supplied
to the circuit by the main voltage source, Vcc and by the base voltage source VB.
For one cycle calculate the total energy and the corresponding average power
consumed by the load resistance R₁. For this purpose, you must use the load
resistance R₁'s value and the corresponding collector current.
k) Calculate the following difference: (total energy defined in (i)) minus (total
energy defined in (h)). The same difference can be defined by using the
corresponding average powers.
Compare the difference obtained here with the values obtained in (j).
1) The circuit efficiency in percent, counting the total energy or the corresponding
average power supplied by both, the main and the base de source, and the total
energy or the corresponding average power lost in the transistor and in the
base power resistance Rp.
For the same purpose, it can be counted the total energy or the corresponding
average power supplied by the main and base de sources and the total energy
or the corresponding average power absorbed by the load resistance R₁.
m) Along an operation cycle, plot the instantaneous power carried by the
transistor, counting only the collector current. On the graph clearly specify the
value for the maximum and minimum value of the instaneous power and the
corresponding moment in time when each of these is reached.
*The amount will be in form of wallet points that you can redeem to pay upto 10% of the price for any assignment. **Use of solution provided by us for unfair practice like cheating will result in action from our end which may include permanent termination of the defaulter’s account.Disclaimer:The website contains certain images which are not owned by the company/ website. Such images are used for indicative purposes only and is a third-party content. All credits go to its rightful owner including its copyright owner. It is also clarified that the use of any photograph on the website including the use of any photograph of any educational institute/ university is not intended to suggest any association, relationship, or sponsorship whatsoever between the company and the said educational institute/ university. Any such use is for representative purposes only and all intellectual property rights belong to the respective owners.