# Questions tagged [sensitivity]

The sensitivity (or responsivity) of an electronic device or system, such as transistors, amplifiers, communications systems, represents the minimum magnitude of an input signal needed in order to provoke an output signal.

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### Digital Microphone Readings to dB SPL

I've seen previous answers on how to calculate the dB SPL based on my I2S readings but I can't come up with a formula to calculate it. I use the MSM261S4030H0 I2S microphone with sensitivity of -26 dB ...
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### Simulate hall voltage as a function of temperature in LTspice

I'm trying to simulate how temperature affects voltage sensitivity in my hall sensor from LTspice. How do I make use of this equation to get my correct output? Any feedback will help, thank you. I ...
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### Switching a solid state relay when millivolt difference is detected

I have this circuit that switches a solid state relay whenever a difference of a few millivolts is detected between a $V_{IN}$ & $V_{REF}$. Full schematic here The above left circuit works ...
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### Ideal headphones impedance/sensitivity for op-amp

The maximum output voltage of my audio source is 3 Vpp and the maximum output current of my amplifier (op-amp AD4075-2) is supposed to be 45 mA. What would be the ideal impedance and sensitivity of ...
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Is it possible to roughly estimate the sensitivity of a receiver in an an echoic chamber where there is no input signal supplied but the chamber just has noise. Given the receiver sensitivity equation ...
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### Allowable process variation for non minimum phase plant

Scenario (plant model subject to process variations) Consider a plant $P(s)$ in series with a controller $D(s)$ with a negative feedback path around it, where the closed loop is given by the ...
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### Accelerometer sensitivity

I'm working with a MEMS Accelerometer, specifically the MS 3028. In it, the sensitivity is given as the following: That seems like exceptionally large variation in sensitivity. I am aware that this ...
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### Stuck during designing a PI Controller

I'm trying to design a PI Controller on the basis of this paper: "Design of robust PI control systems based on sensitivity analysis and genetic algorithms." by Jau-Woei Perng • Shan-Chang ...
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### Resolution versus sensitivity of a multimeter

I am trying to understand the difference between resolution and sensitivity. After searching on the internet and the youtube I found more or less the below definition, but in practice I can't ...
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### What does sensitivity mean for a current sensor when given in "mV/N" or "mV/mT" rather than "mV/A"?

I have been analyzing various datasheets of current sensors and majorly getting sensitivity given in "mV/A," from which I understand the output voltage per 1 ampere. I do not understand it ...
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### Trying to relate microphone sensitivity and SPL

In this: I don't understand equation 3. How does 20·log10(...) - 94 dB = SPL? If I did the example and solved the equation for 70 dB, I would get something around: 10(70+94)/20 · 6.3 · 10-3 = 998483 ...
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### In terms of costs of mass production: is it better to try to reduce resistances' tolerance or capacitors' tolerance?

So I am doing a small project of optimization of components tolerance to reduce the impact of circuit sensitivity to meet a project specification. Right now I am with 5% resistors and inductors and 3% ...
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### How do I calculate sound pressure level (dB SPL) from headphones at a specific setting on my sound card?

I am using headphones with sensitivity 102 dB SPL / 1 Vrms with impedance of 300 ohms. For a particular volume knob setting on my sound card embedded with a headphone pre-amplifier, I would like to ...
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### Make microphone less sensitive [closed]

I bought a pack of 5 MAX4466 microphones on amazon, and would need to use them to detect when a plate is hit by a bullet. There are 4 plates, each one with a microphone glued to the back. The bullet ...
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### TTP223: interaction with plastics

I amm working on a tactile button based on the TTP223. While trying to implement it, I realized that there are unpleasant interactions with plastics. I don't understand why. The interactions appear ...
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### Scale dB SPL based on mic sensitivity

I have a measurement performed using GRAS 46AE microphone calibrated at 410mVrms at 114dB (250Hz). I have a .wav file recorded and performed stft and obtained the magnitude. Now I would like to scale ...
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### Verilog odd behavior with multiple edge detect

So I'm a newbie to Verilog. I decided to purchase a nice board (a Terasic DE0-CV) and teach myself some Verilog. And I'm seeing some strange behavior that I can't explain. I lifted some code out of ...
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### Negative feedback gain sensitivity

What happens to the gain sensitivity of negative feedback system due to fractional change in open loop gain when feedback gain His about 0.01-0.05. Here's my work:
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### how to interpret results from circuit sensitivity analysis

If you do a search on circuit sensitivity, you come across a presentation from Ti that discusses it, Circuit Sensitivity. In it, for example, they solve for the Q of a filter, and perform the ...
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### Sensitivity analysis of a filter

I have a question about sensitivity calculations. I have a lowpass Sallen & Key filter. I calculated: the relative error of the pole frequency due to the relative error of passive components and ...
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### Processing the signals generated by the sensor at the expense of sensitivity / selectivity

I'm having trouble finding study material or subject. Theme: Emphasize the processing of signals generated by the sensor at the expense of sensitivity / selectivity. I can find material related to ...
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### Voltage sensitivity coefficients for unbalanced radial distribution feeders

I am wondering if my implementation of voltage sensitivity coefficients for unbalanced three-phase-four-wire radial distribution feeders is correct. We got $\bar{V}$ for phase(s) of all the buses ...
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### Sensitivity of a frequency meter

Can I know the sensitivity of a power frequency measurement unit? I can not find it in the specifications sheet. I do have, though, the accuracy of the unit (10 mHz) Thanks in advance!! Update : I am ...
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### Simulation of voltage sensitivity of ideal detector diode circuit

Application note 969 derives the voltage sensitivity at zero bias of a detector diode: $\gamma = \frac{V_o}{P_{\rm in}} = \frac{0.52}{I_s(1+\omega^2 C_{j0}^2 R_S R_V)} \cdot \frac{R_L}{R_V+R_L},$ ...
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### How to compare a magnetic loop antenna to a conventional antenna

I want to build a compact 1 MHz receive coil (antenna for very near field). For that I need to make a choice on whether to build a simple RF coil only consisting of wire and capacitors or using a coil ...
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### Microphone closest to mimic human ear (not just few inches away) [closed]

I am currently doing a project that require sensitive microphone as in human ear for voice recognition - but not sure where to start. From what i understand common microphone could only pickup sound ...
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### Calibrate/adjust sensitivity of a 801S Vibration Sensor Module

I have some 801S Vibration Sensor Module I want to use for a project, but I need to make sure they have the same sensitivity. The sensor module has a potentiometer which makes it possible to adjust ...
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### Understanding the workings of an ultrasonic sensor

I am trying to simulate an ultrasonic sensor using a ray-based approach. For that, my current process can roughly be described as such: approximate wavefront using rays that mimic the shape of the ...
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### Why does the high capacitance of a metal oxide varistor affect sensors and signal sensitivity?

I want to know why the high capacitance of metal oxide varistors affects sensors, signal sensitivity. How does capacitance affect sensitivity ? If we add a low capacitor in series will the total ...
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### How to determine LVDT sensitivity?

I performed an experiment using an LVDT where I used a generator voltage of 4.84V. I determined the secondary voltage at the beginning position, obtaining 2.48V and at the end (displacement os 22.5 cm)...
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### Sensitivity analysis question

I am trying to figure out how to calculate the sensitivity of a circuit, especially the sensitivity of a damping ratio (how much the damping ratio changes as each component value varies). Expression ...
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### Reading and interpreting output sensitivity of a load cell from data sheet

I'm given these ratings /spec for load cell / sensor: Range: 0-200kg Output sensitivity: 0.7 ± 0.15mV / V Nonlinear: 0.05% F.S Hysteresis: 0.05% F.S Repeatability: 0.05% F.S Creep: 0.05% F.S/3min ...
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### What sensitivity of reed switch should I use?

For my GCSE Engineering project, I am building a device which attaches to the frame of a bike, and uses a magnet (Attached to the wheel) to detect 1 turn of the wheel (I have also compensated for ...
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### Antenna communication [closed]

How could I determine if 2 antennas could communicate knowing the distance between them, the power/gain of transmitting/receiving, and the sensitivity level of the receiver?
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### Sensitivity (or responsitivity?) of an electrochemical sensor - Definition

I read a paper about an electrochemical sensor where there is the term sensitivity expressed in ampere. What is its definition? I found a IUPAC definition here, but the units are ampere/watt or volt/...
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### How to increase pressure sensor breadboard sensitivity?

I build a pressure sensor breadboard according to the schematic. It works, but has quite low sensitivity - it shows some pressure only after big pressure is applied. Is there a way to increase ...
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### Terminology confusion with sensitivity used with gain

For force transducers like strain gauges, the resolution is the smallest change in the load that represents a change in the output value of the measured force and moment. The smaller the resolution of ...
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I would like to benchmark my ADC. I can calculate a sensitivity value based on the information in the datasheet. However, I would like to measure/benchmark this figure. Is there a standard method ...
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A force traducer has a resolution of 0.0625N. And the analog output sensitivity is 32N/V. So I calculate the voltage output resolution as 0.0625/32 which is around 2mV. If this signal now is sampled ...
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### Ultra-low power sound/audio sensor for LOUD noises

I'm searching for a sound/audio sensor with ultra-low power consumption to detect the presence of a really loud noise (100dB+). The controller runs on battery and there is no option for a different ...
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