Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [voltage-amplification]

28 questions
2
votes
1 answer

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 much as possible. With no load, I do get around…
jonen
  • 23
  • 3
2
votes
3 answers

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 classical and simple circuit as discussed for example in…
jf_vt
  • 333
  • 1
  • 7
2
votes
3 answers

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 (LTP) shouldn't VAS stage (Q12+Q4) in cut-off…
bstack
  • 51
  • 8
2
votes
1 answer

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 I plan to drive with the 2.6 VAC clock from my MCU.…
Landon
  • 167
  • 1
  • 7
2
votes
2 answers

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 complementary differential pair that drives VAS and…
Keno
  • 2,360
  • 2
  • 35
  • 65
1
vote
2 answers

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 LM324Vs at hand and I can also use an ADS1115…
Lord Voldemort
  • 59
  • 5
1
vote
2 answers

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 the class-AB amp only amplifies the current and not…
Oli
  • 99
  • 7
1
vote
1 answer

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 least 50 Vpp (preferably over 150 Vpp). I tried to…
Landon
  • 167
  • 1
  • 7
1
vote
0 answers

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 hz and note channel 1 is input while 2 is…
user183710
  • 94
  • 7
1
vote
3 answers

Conversion from microvolt to volt

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 milli order. And then I am using TL084cn as a…
user183710
  • 94
  • 7
1
vote
2 answers

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 Arduino or Raspberry. The problem I have: The flow…
DeMo
  • 113
  • 3
1
vote
3 answers

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 as input stage of amplifier and "eliminator" of…
Keno
  • 2,360
  • 2
  • 35
  • 65
0
votes
1 answer

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) with a pk-to-pk of ~3.5 V. I am new to this and I…
user340621
  • 3
  • 2
0
votes
1 answer

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 mean of the oscillation? (I would like the curve…
c.leblanc
  • 337
  • 6
0
votes
2 answers

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 make the output baseline adjustable or very…
Jing
  • 157
  • 7
1
2