Questions tagged [gain]

Simply the ratio of output signal to input signal, this dimensionless quantity is a measure of the amplification of a signal which may be represented by voltage, current of may even have a digital representation. A very general concept sometimes used to describe attenuation (when gain < 1)

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What is the use of second transistor in this circuit?

This is probably not a good title, can you suggest me a better one? I have this circuit above, and I am supposed to find its voltage gain \$V_{out}\over V_{in}\$. But I don't understand what use the ...
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121 views

Opamp gain calculation

May be a very basic question, I am a chemical engineer with limited electronics knowledge. The circuit is a potentiostat with the current source \$I\$ being a sensor electrode. I was looking for a ...
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Gain of single input differential amplifier

When performing the small signal analysis of the circuit shown below, with \$ V_{1} = V_{in} \$ and \$ V_{2} = 0 \$, and output taken from \$ V_{02}\$, I consider the small signal model for half of ...
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190 views

Maximum Gain For Chopper Stabilized Instrumentation Amp (MCP6N11)

I am using a Microchip MCP6N11 chopper stabilized instrumentation amplifier to amplify the signal from a MPX2300DT1 Wheatstone bridge pressure sensor. My schematic is attached. As shown the gain is ...
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Calculating the gain of a specific transistor amplifier circuit

NOTE: There is an error in the drawing above — C1 should be connected to the emitter, not the collector. Hi Electronics SE, hope this is the right place to ask this, if not I'll gladly take it ...
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52 views

Choosing gain to get desired system response

I have to choose a gain so the step response fits a couple of criterias. The criterias are: Maximum overshoot 20% Settling time between 0.8s and 1.3s Rise time between 0.8s and 1.1s At first I tried ...
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327 views

NPN Transistor Parameter Determination Gain Question

In the interest of making an oscillator, I made the above circuit after reading about gain, current flow, active region, and how an NPN transistor works. I then put the circuit in LTSpice and note ...
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Creating atime based heat exchanger simulation in OpenAi gym and MATLAB for the purposes of temperature control regulated flow rate in

Apparatus: Crossflow Tube and fin HX. (liquid-to-air Intercooler), Hot Side: Tube side, gas flowing internally Cold Side: fin side, water flowing in crossflow Goal: Generate an environment in "...
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35 views

How to calculate a parallel power gain?

I had once an oral exam where the teacher was asking me how to calculate the power gain in a parallel way. I am doing datacommunication/telecommunication. In the following pictures I am sharing ...
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33 views

Antenna Factor unit and calculation

The antenna factor equation in a 50-ohm system is expressed as: $$AF={9.73 \over \lambda*\sqrt(Gain)}$$ Where Gain is in dB, the wavelength in meter and the calculated AF is in dB/m. $$$$ First, How ...
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Help selecting feedback and ground resistors for a gain and offset circuit

I have an input signal from -3.3V to 3.3V and the ADC I would like to use can only read from 0 to 3.3V. I also have access to a stable source of power at 3.3V. From previous visits, I have tried to ...
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sallen-key bpf giving low gain after coupled to differential input

I designed a Sallen-key band pass filter where the gain at center frequency is 45.6dB. After feeding it with a sine wave at the center frequency, it amplifies the signal by 45.6dB. However, after ...
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339 views

Designing a two stage differential amplifier with MOSFETS

As a part of a "Test you understanding quiz" i had yesterday at school were we tested our understanding of differential amplifiers and mosfets i came across a question that asked us to design a ...
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Gain bandwidth product of amplifier in a DC scenario

I think I have a simple (but still to me confusing) question regarding the gain bandwidth product (GBP) of an instrumentation amplifier: Datasheet (AD8237) I have sensors that change their output ...
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57 views

DC Gain too low at higher voltages

I am having an issue with DC gain for a non-inverting op amp circuit. All I am trying to do is double the voltage from two DAC outputs (DAC range is 0 to 5V and I want it to be ~0V to 10V). The DAC ...
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81 views

Measure the 'gain' of this circuit

I made this schematic using NI Multisim and I got asked to find the ‘gain of this circuit using a 1V p-p 1kHz sine signal’ and I was unsure about this because I’m not sure if it means voltage gain or ...
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171 views

Controlling an output based on level of AC signal

This is my first post on this StackExchange after years of lurking, so please be gentle! I would like to be able to enable an output (for example an LED) based upon an AC voltage from a split-core ...
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430 views

yagi antenna gain formula

is there any specific formula to calculate yagi-uda antenna Gain? i know that The Gain of Yagi Antenna depends on length of antenna array and do not depend on number of directors used in the design , ...
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137 views

Maximum mid-band gain of s.s. model MOSFET amplifier?

Schematics I need to find the maximum possible gain for this NMOS cascode circuit. Here is the s.s. model: Work I used nodal-matrix analysis (basis is KCL) to find the gain (\$A_v\$): $$ \...
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179 views

Simple OP-AMP Frequency Response

In my textbook, there are two interrelated equations. 1. wb = wt / (1 + R2/R1) 2. wb = wt / Ao where ...
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59 views

Headphone Amp Impedance Select Switch

I'm designing a headphone amplifier, and I'd like it to be compatible with both 32 ohm and 600 ohm headphones. Therefore, I figured I could introduce a switch which allows the user to change the gain ...
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250 views

Calculating gain of ICF amplifier

I'm designing a circuit with an ICF (indirect current feedback) amplifier, and am trying to calculate the gain of the resultant circuit. Using the AD8237 I followed the example here when designing ...
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552 views

Simulating ADL5536 Gain Block with Ideal Amplifier

I'm trying to simulate the ADL5536 Gain Block in LTspice. A link to the datasheet can be shown below: http://www.analog.com/media/en/technical-documentation/data-sheets/ADL5536.pdf Analog Devices ...
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242 views

Fundamental Limit on Antenna Gain?

Harold A. Wheeler, “Fundamental Limitations of Small Antennas,” has introduced the concept of "boundary sphere", where the smallest sphere or circle surrounding an antenna has interesting implications ...
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249 views

Did I mess up my lab experiment ? (active low pass filter)

This is the table of the readings and I have worked out the gain which is $$\frac{Vout}{Vin}$$ and I got all 5 at the beginning ... but I also remember that the values of the resistors in the feedback ...
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Designing a Multistage Amplifier

I have to design a BJT multistage amplifier to meet a specification provided by my professor. The first stage is to be a differential amplifier, and the second stage is to be a common collector ...
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260 views

Differential amplifier problem

I really can't determine what my professor meant by this. He wanted me to calculate parameters of BJT differential amplifier that will have -100 amplification for signals difference and -1 for their ...
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58 views

How do I compute the gain on this differential amplifier (in an open loop)?

Hello! I've got this project due for a college course, and the teacher has reviewed my work and said that it is within specification, but he asked me to compute the gain the good old fashioned way ...
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How do I calculate the gain of opamps in this circuit?

I can calculate the gain of AD8656 but can not calculate the overall output gain of this circuit. What is the method of doing the calculation?
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62 views

Design of an amplifier with emitter degeneration

I'm trying to solve a question that says to find \$gm\$ and \$R_c\$, considering a gain of 50 using a BC547b transistor. But I can't find a way to calculate these parameters with the information I ...
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Ce stage amplifier

I wanna design a ce stage amplifier with this specification : Gain 20 Rc=10k Max swing The simiulation of the circuit is not the same with may calculations, How can i solve this? what i get from ...
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42 views

Differentiator step response

I have one ideal and one practical differentitiator circuit in Multisim to which I am applying a positive, say 10 V step response. The output I get has a much lower settling time at final value of 0 ...
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Opamp: Does the openloop Gain changes depending on the Input stage?

In case for bipolar Input stages on Opamps: does the actucal Openloop gain changes depending on which input stage, n or p channel is used? (which depends on the applied input signal) Could not find ...
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Op-amp with constant output voltage (Peak to Peak)

I am new to opamps and am trying to amplify a variable frequency sine wave to a constant 5V peak-to-peak using opamps. The input signal amplitude changes with frequency, but the opamp should always ...
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Automatic gain control circuit with dc offset

I have a circuit that takes a sine wave amplifies it a little bit but also adds a DC offset of 1.5V. It works perfectly no matter the input volume. Now that I am reworking everything it would be nice ...
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59 views

distance between linear and non-linear function of op-amp system

I have a circuit which I have taken a picture of as you can see, in which i have values of $$R1=1k\Omega,R2=10k\Omega,R3=10k\Omega.R4=10k\Omega,R5=20k\Omega$$ and sine input signal with off-set value=...
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“Coupling” gain-setting resistors in a single-ended source, differential amplifier?

I am working on a fully differential amplifier design that receives a single-ended differential voltage from a piezo sensor. I computed a theoretical gain and selected appropriate resistors and it ...
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62 views

Troubles with mic preamp for headphones with integrated microphone

I am designing a preamp intended to interface with a microphone in common headphones (e.g. apple earpods, or sony headphones with a microphone) which will then connect to my ADC's inputs. I've ...
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Two antennas, one board

Everybody. I have a doubt. If I use one connector like this: https://www.data-alliance.net/rp-sma-t-splitter-y-adapter-joiner-join-2-antenna-cables-to-one-connector/ In one board and connect two ...
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Signal clipping in cascade transistor amplifiers

The two-layer voltage amplifier circuit can transfer a signal of up to Vi = 50 mV to the output without clipping.and 1st stages gain Av1=-6.41 . +15 volt is ...
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Troubleshooting butterworth bandpass gain stage issues

I am having issues solving the gain stage section of my bandpass filter design. I used a multiple feedback 6th order lowpass and a 6th order sallen-key high pass to get a bandpass filter with cutoff ...
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A question about antenna gain and signal property

I have an antenna with a somewhat constant gain "X dBi (theta, phi)" in the frequency range of interest. With this antenna we receive a radio signal with an amplitude of "Y Volt (t)". The signal is ...
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Voltage phasor problem in textbook wrong?

An example in my textbook gives this problem: Find the phasor representation of vo = -5cos(2000πt+25°) Answer: 5<-65° Shouldn't it be 5<-155°? You subtract/add 180° to get the negative of ...
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Op amp output DC operating point variation with load current

Consider a cmos op amp in non inverting configuration. For a small load current, we expect the output DC voltage to be the input DC voltage multiplied by closed loop gain. As the load current is ...
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How to make a preamp that is ON when input is a MIC but OFF when a LINE level?

My question is very simple: Is there a way to create a "preamp" circuit that is automatically ON when there is a MIC connected (for example, a desktop PC microphone) but OFF when there is a LINE ...
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Using a PGA to scale input voltage ranges?

I have a current design of a circuit which works well, but I am needing to make a few extensions to it. I am working on a 4 channel oscilloscope. Each channel must be able to take various ranges of ...
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Can someone how to find this voltage gain neglecting r0

I'm trying to figure out why my professor starts off the way he does when trying to find voltage gain. How he starts off is shown in the last picture. Any explanation would be appreciated.
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Setting gain on Improved Howland current source (best practice)

I understand that you can set the gain of an improved Howland by setting the the ratio of resistors \$R_2\$ and \$R_1\$ and/or the value of \$R_{\text{set}}\$. Is it better to leave the ratio of \$...
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196 views

Order of op amp cascade to reduce noise

I am currently designing a little circuit to amplify a weak signal with two sequential op amps. To reduce the noise at the output of the two amplifiers, what would be the best order to place these ...
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What is the small differential gain?

Circuit 1: is the original circuit, circuit 2: Half circuit, circuit 3: small signal model For this circuit we are assuming lambda=0 Our solution: Vin=Vgs1 Vout=-gm3*Vgs3*R1 Av=Vout/Vin=(-gm3*Vgs3*...