All Questions
Tagged withamplifier
circuit-design
107 questions
1
vote
1answer
55 views
Symmetrical Signal with operational amplifier
I hope you can help me. I have a project with operational amplifiers. In this project I need to create a mirror signal (symmetrical signal) from this output: To Something like this: The two ...
0
votes
2answers
38 views
OP2177 opamp with single supply
Does anyone know if I can use "OP2177" with a single supply without a negative voltage on V- ?
1
vote
3answers
70 views
Design an RF amplifier for a photodiode
I've been asked to present a possible solution to design an optical system aimed at estimating the arrival time of the following light signal: $$s(t)=[\Sigma_{i=1}^∞rect(\frac{t-t_i}{T})]\cdot Acos(...
0
votes
2answers
72 views
DCF77 antenna preamplifier from available components
I plan to build a DCF77 receiver, which includes an active antenna. When I was looking for inspiration to design an antenna preamplifier, I came across a scheme that I liked. Here is the link. When I ...
-1
votes
1answer
89 views
How to design a transistor voltage divisor amplifier with a load resistance of 100 ohms?
I am trying to design a transistor amplifier with a load resistance but I have a lot of problems because the load resistance is very low. I can't change the value of it. I have read a lot about it but ...
0
votes
0answers
22 views
substitute of SE2431l front end ic
I am working on the project with SE2431l front end ic ,unfortunately the lead time of the ic is very much. So i was searching for the substitute. I found RFX2401C but the pin to pin configuration is ...
0
votes
2answers
116 views
I'm trying to build a Common Emitter Amplifier, but nothing is working [closed]
My transistor model is BCx19, and I'm trying to get a 10 times gain. I am honestly kind of lost. COuldn't get a lot of info from my teacher, I was just more confused when I asked him.
2
votes
1answer
50 views
Stability of a RF Amplifier
In this article a RF Amplifier Design is proposed. It's written that (page 2): In an RF transmission network, if the reflection coefficient of a certain port is greater than 1, positive feedback will ...
2
votes
3answers
135 views
Low Pass Current to Voltage Amplifier with 2 Op-Amps
let's consider this two Op-Amp amplifier: From what I can understand, it consists of two amplifiers: A current to voltage low pass filter (at left) A non-inverting amplifier (at right) Well, there ...
1
vote
2answers
82 views
Why does my summing mixer max out at 5.39V when my rails are roughly +/- 11.7V?
I've been working on this project to sum and scale DC voltages from 2 sets of four 0-5V variable voltage dividers, into two separate mixes with identical circuits. In my previous version, I fed the ...
0
votes
1answer
65 views
Square wave voltage regulator
I wanted to build a simple amplifier for a square wave generator with the following configuration: The presence of the amplifier is crucial since with my 12Ω load the output peak current may be near ...
0
votes
0answers
57 views
Design a cascode BJT amplifier to achieve a specified voltage Gain
I have been asked to design a cascoded BJT amplifier with the given specifications Voltage Gain = \$76 \ to\ 84\ dB\$ Current Gain = \$66.5 \ to \ 73.5\ dB\$ Power Dissipation = \$ 3.5 \pm 5\% \ ...
1
vote
0answers
99 views
Designing a BJT cascode amplifier for decent gain and bandwidth
For my university course assignment I have to design a BJT amplifier using a Cascode stage with the following specifications using LTSpice. Only Vcc=3.3V and ground rails are available as well as a ...
2
votes
1answer
41 views
Functionality of output stage of a cmos amplifier circuit
I have the following circuit and I'm wondering a little bit about the functionality of the output transistors M12-M19. simulate this circuit – Schematic created using CircuitLab I know that M1,...
0
votes
0answers
91 views
Output impedance of JFET source follower with constant-current biasing
I try to study the output impedance of a JFET amplifier biased by a current source, but I can't do it. I know how to determine the output impedance of a JFET amplifier polarized by a voltage divider, ...
