Questions tagged [voltage-amplification]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
2 votes
5 answers
127 views

Stages of audio amplification from mV to 20V+

I have been trying to learn how to amplify audio signals from very small signals (20mV) to large signals (20V+) while using only transistors. I have figured out how to build a class A common emitter ...
Marcus Marchese's user avatar
2 votes
2 answers
186 views

External DAC (DAC8568) software calibration

I'm using a 16-bit 8-channel DAC (DAC8568), driven by STM32 MCU. I need to obtain the 0-5V and 0-10V switchable output range, so to achieve that the voltage must be amplified with op-amp. This raises ...
coldmind's user avatar
1 vote
1 answer
58 views

Need ideas to amplify high baseline signal

I have a liquid level sensor. It is made of two platinum wires submerged in water. Below is description of working principle: Both wires are alternatingly connected to 3.3V and Analog read pin (to ...
Iskander's user avatar
0 votes
0 answers
61 views

Amplification needed to power Helmholtz coils

I'm having trouble generating magnetic flux between these coils that are hooked up to a function generator. An oscilloscope is also used to monitor the waveform. The issue that I'm having is that I ...
sun's user avatar
  • 1
2 votes
1 answer
162 views

Output voltage drop LM358

I am running a LM358 in a simple non-inverting amplification circuit. I am using the single rail supply option, grounding V- and applying 24V to V+. The input voltage is 4V and I want to amplify it as ...
jonen's user avatar
  • 23
0 votes
1 answer
90 views

I want to know the calculation behind this amplification circuit and then how to amplify the voltage and pk-to-pk of the signal

I want to know the math behind this circuit and how to amplify the voltage and pk-to-pk knowing that: MCP4725 delivers a value of ~300 Hz (Coded with arduinoIDE and atmeg328p using sine lookUpTable) ...
user340621's user avatar
0 votes
1 answer
99 views

Amplification of the oscillation of a signal without amplifying the offset

Knowing that I only have op-amps, comparators, resistors, capacitors, and simple diodes at my disposal, is there a simple way to amplify the small oscillation of such a signal without amplifying the ...
c.leblanc's user avatar
  • 339
0 votes
2 answers
318 views

How to zero the output baseline of an op-amp-based voltage amplifier?

There is a constant leakage current flowing through the detector (SiPM) shown in the circuit below. It causes a constant shift of the baseline in the output of the voltage amplifier. Is there a way to ...
Jing's user avatar
  • 157
0 votes
1 answer
147 views

How to convert a PWM signal generated by an M5 Stack Core ESP32 from 3.3 V or 5 V to 12 V and at least 0.8 A?

I am working on a project that requires me to convert two PWM signals of 1 kHz frequency that are generated from an M5-Stack Core from either 3.3 V or 5 V to two PWM signals of 12 V and (at least) 0.8 ...
Stefanos Perdikis's user avatar
1 vote
2 answers
297 views

How to amplify an analog signal 4000 times?

I've got an analog signal that's only 0.00076317235 V. It comes from an IR sensor, and I'd like to read it with an Arduino by amplifying it to 3 V (or 4000 times.) I am a novice at electronics. I have ...
Lord Voldemort's user avatar
0 votes
1 answer
63 views

Low-frequency amplifier capping out

I can't figure out why this amplifier is capping out Aditional details: I can identify 4 waveforms that resemle the output 1st: 2nd: Base of Q42 Waveform same as 1st 3rd: And 4th Waveform same as ...
Dinu VA's user avatar
0 votes
1 answer
161 views

How to amplify low voltage back up to supply level

I have a voltage supply that provides 6 V. The voltage gets run through a complex series of transistors, and the output is around 1.5 V. This is too low for the rest of my circuit to work with. In ...
user118995's user avatar
0 votes
1 answer
473 views

How to use an LC stage as a voltage amplifier?

What I have done From my simulation here, I have tried using a parallel LC stage as a voltage amplifier at resonance. $$f = \frac{1}{2\pi\sqrt[]{LC}}$$ $$L = 0.001$$ $$C = 10 \cdot 10^{-6}$$ $$\...
Shocked's user avatar
  • 193
2 votes
3 answers
213 views

Amplify DC signal: how to deal with real life problem ==> output is close to Vs when input signal too small OK otherwise

Hi I believe this problem must be classical and well known but I cannot find a place where it is specifically discussed: I have build a simple non inverting 2X amplifier following exactly the ...
jf_vt's user avatar
  • 333
1 vote
2 answers
470 views

Problem with class-A amplifier

Update: I'm writing this because some people might think that this is homework. I have built a high power class-AB amplifier to connect it to a subwoofer of 2x2ohm 800W RMS. My main problem is that ...
Oli's user avatar
  • 107
2 votes
3 answers
778 views

Audio amplifier - input stage, negative feedback and current limit

I am reading Audio Power Amplifier Design by Douglas Self and have a couple of questions. With no input signal, (Q2 base = Q3 base = ~0V) no current Ivas should coming out of the long-tailed-pair (...
bstack's user avatar
  • 51
1 vote
1 answer
549 views

High voltage amplification of a waveform generator output

I need to drive an ultrasonic transducer with a high center frequency (25 MHz) using my function generator that outputs a 25 MHz sine wave at only 5 Vpp. The problem is that the transducer needs at ...
Landon's user avatar
  • 177
0 votes
1 answer
63 views

How can I step up 6.5V to 10V?

I'm working with a buck/boost LED driver that uses a 0->10V dimmer input. I would like to use the output of an open-source LED module as a switch for the LED driver. The LED module outputs 0 V in ...
user127813's user avatar
0 votes
1 answer
92 views

Amplification of Bolometer

How would one measure the microvolts change in a 50kΩ Bolometer, as a result of the radiation impinging on it?
user avatar
2 votes
1 answer
838 views

Is a solid state relay with over 1 MHz driving frequency physically possible?

I could only find one question semi-relatable to mine on SE, but I have a more demanding application in mind. I have designed a 32 stage 40 VAC -> 1000 VDC Cockroft-Walton voltage multiplier which ...
Landon's user avatar
  • 177
0 votes
2 answers
116 views

Voltage Amplifier - Using a

I am looking to build a DC voltage amplifier. In this picture, I am using a 2N3904 NPN transistors. Does this work as a DC voltage amplifier? Does it make sense? If this doesn't work, how do I make ...
CPK's user avatar
  • 11
0 votes
1 answer
112 views

Alternative ways to step up voltage?

I want to drive an EOM crystal at 20 MHz for phase modulation. I recently bought a step up RF transformer (1:4 turns ratio), but it's not working fine above 2 MHz. I tried winding a transformer myself ...
Thejas's user avatar
  • 1
1 vote
0 answers
78 views

Amplification problem

I am using an instrumentation amplifier AD620ANalong with another amplifier TL084CN in series. Both have gains of 100 which essential for me since the input is in microvolt range. The frequency is 87 ...
user183710's user avatar
0 votes
0 answers
27 views

Voltage conversion between multiple orders [duplicate]

I have this circuit in which I want to convert the input voltage of micro order to volt. The circuit image has been posted. I have figured out the bandpass filter ( basically everything after the big ...
user183710's user avatar
1 vote
3 answers
953 views

Conversion from microvolt to volt [closed]

I have a circuit which has an input of voltage of the order of micro. I want to convert it into volt order. I am using an instrumentation amplifier AD620 with gain of 1000 to first convert it into ...
user183710's user avatar
0 votes
1 answer
307 views

Amplifier with true ground output swing and A/D conversion

I want to amplify a 0-20mV signal from a sensor to 0-2.048V in order to feed it to an ADC (with a reference voltage of 2.048V). After I will input the digital signal to a microcontroller. I need to be ...
H123321's user avatar
  • 197
-2 votes
2 answers
1k views

Gain of a feedback amplifier with base to collector resistor [closed]

I'm able to solve this problem using the concept of Miller resisitance however I'm having an issue solving this problem using the concept of feedback amplifiers. Can someone help me solve this problem ...
Fawaz's user avatar
  • 354
0 votes
2 answers
310 views

Non inverting OpAmp with NPN amplification factor > 1

I need to amplify the output range of a DAC chip from (0-3.3 V) to (0-10 V). Unfortunately, I cannot simply use an inverting OpAmp circuit, because the output needs to stay positive with respect to ...
Rolf Jansen's user avatar
1 vote
2 answers
405 views

Amplifying signal with Darlington not working

I'm relatively new to electronics and this is not my usual field of work. For a bigger project I need to read a flow sensor's (Biotech FCH-C-PA-N) output. The output needs to be processed by an ...
DeMo's user avatar
  • 113
0 votes
4 answers
908 views

Can capacitors amplify signals?

While reading a topic on opamps, I came across this topic. It said, other devices like capacitors amplify signals differently for different frequencies, while opamps amplify signals irrespective of ...
N Rathankar's user avatar
3 votes
2 answers
609 views

High Frequency Capacitors in Differential Amplifier

I am curious about the function of two capacitors near differential transistor pair amplifier. The circuit picture is cut out of one of Pioneer's audio amplifiers. This amplifier is basically ...
lucenzo97's user avatar
  • 2,430
1 vote
3 answers
857 views

Distortion Elimination with Differential Transistor Pair

Most of you know that incorporation of negative feedback within amplifier is one of major considerations when designing a hi-fi amplifier. Till now, I have only dealt with differential transistor pair ...
lucenzo97's user avatar
  • 2,430