Questions tagged [voltage-amplification]
The voltage-amplification tag has no usage guidance.
32
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5
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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 ...
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votes
2
answers
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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 ...
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1
vote
1
answer
58
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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 ...
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votes
0
answers
62
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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 ...
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2
votes
1
answer
163
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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 ...
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1
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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) ...
0
votes
1
answer
99
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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 ...
- 339
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2
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320
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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 ...
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1
answer
147
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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 ...
1
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2
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297
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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 ...
0
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1
answer
63
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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 ...
- 3
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votes
1
answer
161
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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 ...
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1
answer
474
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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.
$$f = \frac{1}{2\pi\sqrt[]{LC}}$$
$$L = 0.001$$
$$C = 10 \cdot 10^{-6}$$
$$\...
- 193
2
votes
3
answers
213
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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 ...
- 333
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vote
2
answers
470
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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 ...
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3
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779
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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 (...
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1
vote
1
answer
550
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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 ...
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1
answer
63
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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 ...
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1
answer
92
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Amplification of Bolometer
How would one measure the microvolts change in a 50kΩ Bolometer, as a result of the radiation impinging on it?
user258546
2
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1
answer
839
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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 ...
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2
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116
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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 ...
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1
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112
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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 ...
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0
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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 ...
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0
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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 ...
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3
answers
953
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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 ...
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1
answer
307
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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 ...
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2
answers
1k
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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 ...
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votes
2
answers
310
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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 ...
1
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2
answers
405
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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 ...
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4
answers
908
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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 ...
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2
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609
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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 ...
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3
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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 ...
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