Consider the differential amplifier in Figure 11.20 . The transistor parameters are given in Example 11.8, except that λ = 0.02 V − 1 for M 3 and M 4 . Determine the differential voltage gain A d = v o 2 / v d , the common-mode gain A c m = v o 2 / v c m and the CMRR dB . (Ans . A d = 2.74 , A c m = − 0.0925 , CMRR dB = 29.4 dB) .
Consider the differential amplifier in Figure 11.20 . The transistor parameters are given in Example 11.8, except that λ = 0.02 V − 1 for M 3 and M 4 . Determine the differential voltage gain A d = v o 2 / v d , the common-mode gain A c m = v o 2 / v c m and the CMRR dB . (Ans . A d = 2.74 , A c m = − 0.0925 , CMRR dB = 29.4 dB) .
Solution Summary: The author explains the differential voltage gain, common mode gain and the Common Mode Rejection Ratio. The M3 and M4 transistors are identical.
Consider the differential amplifier in Figure 11.20 . The transistor parameters are given in Example 11.8, except that
λ
=
0.02
V
−
1
for
M
3
and
M
4
.
Determine the differential voltage gain
A
d
=
v
o
2
/
v
d
,
the common-mode gain
A
c
m
=
v
o
2
/
v
c
m
and the CMRR
dB
.
(Ans
.
A
d
=
2.74
,
A
c
m
=
−
0.0925
,
CMRR
dB
=
29.4
dB)
.
Consider the common-source amplifier shown in Figure P11.50. The NMOS transistor has KP=50 μA/V2, L=5 μm, W=500 μm, Vto=1 V and rd=∞.a. Determine the values of IDQ, VDSQ and gm. b. Compute the voltage gain, input resistance, and output resistance, assuming that the coupling capacitors are short circuits for the ac signal.
Repeat Problem P11.50 for an NMOS transistor having KP=50 μA/V2, W=600 μm, L=20 μm, Vto=2 V and rd=∞. Compare the gain with that attained in Problem P11.50.
Vs=100 mV peak-to-peak, 1 kHz sine signal, Kn=0.4mA/v^2 ,Vt=1V , λ=0.01V^-1 Make the DC analysis of the above given mosfet amplifier circuit. Simulation to tableWrite down the measured values and mathematical calculation results. (The valueswith the units.)DC Parameters ,Measured value ,Calculated ValueVGETCVGSVDVDSIDb. Draw the small signal model for the AC analysis of the circuit. Find the gm, ro, Av values.c. Show the Vs input signal and the Vo output signal of the circuit on the oscilloscope. Volt/div of channels andSpecify time/div values.
2. A load of 8Ω is supplied by a single-switch Direct Current (DC) chopper with an inputvoltage of 40V. The switching frequency is 800Hz, the duty ratio is 0.4, and thetransmission voltage drop of the transistor is 2.4V
a. Draw the chopper circuit presented in the question
b. Find the switching period with the duty time of BJT
c. Draw the load voltage, load current, BJT current, BJT voltage along two periods
d. Find the output voltage. Is the achieved load voltage the average value or the effectivevalue e. Find the output power f. Find the average value and effective value of BJT current g. Find the power loss of BJT h. Find the DC source current i. Find the circuit efficiency
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