Question

-------Electronics 2-------

1. Design an amplifier using a MOSFET transistor (2N7000) with a Common Source (CS) configuration with a resistor in the Source. Its design should provide an amplification of -12V / V.

2. The voltage Vcc will be +8 vDC, the AC voltage will be 10 mV peak 5 kHz and the load resistance will be RL 2.2 kn.

3. Simulate the circuit in LTSpice. It must choose resistors Ro, Rs, RG1 and RG2 such that the circuit operates in stable active mode. Determine all DC current and voltage values at the calibration point.

4. Add the input AC voltage and load resistance. Determine the input and output voltages to verify the gain.

Answer #1

Design an amplifier using a MOSFET transistor (2N7000) with a
Common Source (CS) configuration with a resistor in the Source. Its
design should provide an amplification of -12V / V.
The Voc voltage will be +8 VDC, the AC voltage will be 10 mV
peak 5 kHz and the load resistance will be RL 2.2 kn.

Design and implement a common-emitter audio amplifier using a
general purpose transistor 2N3904. The design must provide features
such as; mid-band gain of 100 with undistorted output, stable bias
with voltage divider bias (from a 12 or 15V dc source), AC gain
stability with emitter bypass capacitor, and coupling capacitors at
the input and output to block the dc components.
Your design should include complete calculations for choosing
voltages, various circuit components (resistors, coupling
capacitors), and the circuit diagram. The...

Design, simulate, and implement a multistage discrete amplifier
using small-signal BJT transistors.
Amplifier Specifications:
– Midband voltage gain: Av = 100.
– Lower 3-dB frequency: fc = 100 Hz.
– Input Impedance: Zin ≥ 250 kΩ.
– Output Impedance: Zo ≤ 100 Ω.
– Power Supply: Vcc = 15 V.
– The load resistance is 1 kΩ
– Output capability with a 1–kHz sinusoidal test signal must be
at least 2 V peak without severe distortion (i.e. clipping).
– Transistor...

Using MultisimBlue – Advanced Circuit Simulation Design Program
make a
I. CE Swamped Amplifier Circuit producing the
following:
1. DC Current Gain: ?DC = 150 (minimum value) 2. AC Voltage
Gain: Av = 12 (minimum value)
II. Required Components:
1. Transistor Q1 – 2N2222A producing a VCE between 8 V to 12
V
2. Input AC Source: 10 mVAC (14.14 mVpk) @ 1 kHz
3. Coupling and Bypass Capacitors – 30 µF (suitable for low
frequencies)
4. Circuit VCC of...

Design the circuit of a source follower JFET amplifier biasing
circuit with load RL and input voltage internal resistance RS that
having a gain of +0.2. The specification of the circuit is given as
below: Supply voltage, VCC = +12 V; Input impedance, Zi = 10 k;
cut-off frequency from source capacitor, fLS = 40 Hz; cut-off
frequency from gate capacitor, fLG = 4 Hz; VGSQ = -2.86 V; IDSS =
16 mA and Vp = -4 V

In a two-story voltage amplifier circuit, there is PNP on the
first floor and NPN on the second floor. A total of 10 resistors
and a total of 5 capacitors were used in the circuit, 5 resistors
per floor. Re resistance of PNP transistor is 63.31 Ω and re
resistance of NPN transistor is 15.25 Ω. The input impedance of the
first floor is 212.36 Ω and the input impedance of the second floor
is 9.1 K Ω. There is...

Micro electronics:
2.
A circuit with a MOSFET transistor uses a 2 kohms resistance to
connect th Drain to a +20V DC supply, uses a 300 Ohms to connect
the source to ground, usesa 3.6 mohms to connect the Gate to a +20V
supply, and uses a 400 Kohms to connect the Gate to Ground. If Vs
is +1.5V, draw the circuit, and determine Id, Vgs, Vds and
Vd.

Design an Op-Amp Circuit that takes an input from a low current
capacity voltage source (i.e. a high internal impedance source)
with voltage range of -15mV to 15mV, amplify it, adds a DC offset
so that the voltage is always positive filter it (LPF 1, 18.3 KHz)
and the convert it into digital output (reference voltage of ADC
12V). Also determine the minimum sampling rate of ADC

Voltage amplifiers are available with Avoc = 8 V / V, Rin =
1.8 kΩ, Ro = 850 Ω. With a 12 V DC power source, each amplifier
consumes 1.5 mA average current.
a. How many amplifiers do you need to connect in cascade to
get at least a 1000 voltage gain with a load resistance of 1.0
kΩ?
b. What is the voltage gain Av obtained? (Respond with a
rounded whole number)
c. For the cascade connection, find the...

1. If a system has a gain greater than 1:
____________________
2. If a system has a gain equal to 1: ____________________
3. If a system has a gain less than 1: ____________________
4. If a system has a gain greater than 0 dB:
__________________
5. If a system has a gain equal to 0 dB:
____________________
6. If a system has a gain less than 0 dB: __________________
7. For a voltage amplifier to increase the source voltage: Rin...

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