Determine the values for the resistors R1, R2 and RE that would meet this requirement. Assume VBE = 0.7 V, and B= 200. %3D Draw an a.c. small signal equivalent circuit for the amplifier using an h (hybrid) parameter model for the transistor in Figure 4a. State the name and unit of each parameter of the model. Assume the capacitors are short circuits at the frequencies to be used. Using your small signal model calculate values for the input resistance, output resistance and voltage gain of the amplifier. Assume hje = 1 k2 and hje = 200.

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It's the same question but IB = 0.01mA not 10mA so the solutions towards the end were different. Just wanted to check what answers you get with that current. 
And R1 wasn't square rooted in the solution I think 

a) The amplifier shown in Figure 4a has been designed to have the operating point:
Ic = 2 mA, VCE = 4 V,
where Ic is the collector current and VCE is the collector-emitter voltage.
Vcc = 15 V
Rc = 1.5 k2
R1
V out
Vin
R2
RE
GND = 0 V
Figure 4a.
i)
Determine the values for the resistors R1, R2 and RE that would meet this
requirement. ASsume VBE = 0.7 V, and B = 200.
ii)
Draw an a.c. small signal equivalent circuit for the amplifier using an h (hybrid)
parameter model for the transistor in Figure 4a. State the name and unit of each
parameter of the model. Assume the capacitors are short circuits at the
frequencies to be used.
iii) Using your small signal model calculate values for the input resistance, output
resistance and voltage gain of the amplifier. Assume hje = 1 k2 and hfe = 200.
Transcribed Image Text:a) The amplifier shown in Figure 4a has been designed to have the operating point: Ic = 2 mA, VCE = 4 V, where Ic is the collector current and VCE is the collector-emitter voltage. Vcc = 15 V Rc = 1.5 k2 R1 V out Vin R2 RE GND = 0 V Figure 4a. i) Determine the values for the resistors R1, R2 and RE that would meet this requirement. ASsume VBE = 0.7 V, and B = 200. ii) Draw an a.c. small signal equivalent circuit for the amplifier using an h (hybrid) parameter model for the transistor in Figure 4a. State the name and unit of each parameter of the model. Assume the capacitors are short circuits at the frequencies to be used. iii) Using your small signal model calculate values for the input resistance, output resistance and voltage gain of the amplifier. Assume hje = 1 k2 and hfe = 200.
島 CHAT
Vx MATH SOLVER
ASK
Homework help starts here!
li,
VCE = uv
Vecこ IS,
VCE =
Vc-VE
Vcc - IRc = 15-2XIS
12V
ニ
4=12-VE =D
VE = 8V
a x201
= २०7)
VE
RE )
If =
ニ
200
Sェ 3 F I
If = di0l m
RE =
こ
2.01m
3.98k2
IB =
lo MA
ニ
200
VB = VE to.7 =
807 V
VB - Vth - IB Rth
, Vth=
R2X15
is Rz
ニ
Ri+hz
Rithz
Rhこ
RIRZ
RitRz
8.1=
15 Rz
\oメlo Ri Re
Rithz
Rithz
8.7 R, + 8-7Rz =
IsRz-
RIRZ
100
870 R, + 87082 =
150oRe - RIRZ
630 R2 -R, Rz
ニ
Rz
ニ
gor 810R, = 630X2 RI
1260 - 87 o
ニD Ri:195たa
2R, :
ニ
20A I
Transcribed Image Text:島 CHAT Vx MATH SOLVER ASK Homework help starts here! li, VCE = uv Vecこ IS, VCE = Vc-VE Vcc - IRc = 15-2XIS 12V ニ 4=12-VE =D VE = 8V a x201 = २०7) VE RE ) If = ニ 200 Sェ 3 F I If = di0l m RE = こ 2.01m 3.98k2 IB = lo MA ニ 200 VB = VE to.7 = 807 V VB - Vth - IB Rth , Vth= R2X15 is Rz ニ Ri+hz Rithz Rhこ RIRZ RitRz 8.1= 15 Rz \oメlo Ri Re Rithz Rithz 8.7 R, + 8-7Rz = IsRz- RIRZ 100 870 R, + 87082 = 150oRe - RIRZ 630 R2 -R, Rz ニ Rz ニ gor 810R, = 630X2 RI 1260 - 87 o ニD Ri:195たa 2R, : ニ 20A I
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