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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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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3 votes
2 answers
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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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1 answer
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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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6 votes
2 answers
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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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1 answer
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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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1 answer
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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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1 vote
1 answer
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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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2 answers
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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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1 vote
3 answers
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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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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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Measure sensitivity of ADC

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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Estimating the adequate ADC resolution given a sensor resolution

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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-2 votes
1 answer
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Definition of \$ \frac{mm}{Ampere}\$ (unit of current sensitivity)?

I want to know how \$ \frac{mm}{Ampere}\$ (which is the unit of current sensitivity of PMMC instruments) is defined? i.e, How \$ mm \$ is defined in terms of \$ degrees\$ ? For eg.: \$ \frac{rad}{...
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IR circuits: increasing sensitivity of simple analog receiver IR LED

I have the following circuit using a TSOP1738 and a simple IR receiver LED (analog): It's basically: a TSOP1738 put to my 5V uC pin, its OUT being read directly by the yellow channel of my ...
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1 vote
2 answers
636 views

What is "Vop" sensitivity unit?

I am studying the datasheet of an ultrasonic transducer (Murata MA58MF14). I understand the maximum input voltage unit (voltage peak-to-peak), but I do not understand what exactly the sensitivity unit ...
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Evaluating 741 op amp sensitivity to loading in non-inverting and summing op amp circuits

I am doing lab preparation but I am not sure how to evaluate 741 amplifier sensitivity to loading based on my non-inverting circuit with a gain of 21 and my summing circuit with a gain of 55. I know ...
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1 answer
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Relation between bandwidth, response time and disturbance rejection for a control system

I read the following line in a control system book: Higher bandwidth corresponds to better command following, disturbance rejection and sensitivity to parametric variations. On the other hand, ...
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1 answer
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Reading a transducer sensitivity from its datasheet

How can I calculate the sensitivity of this transducer? I also read at a text "The sensitivity is typically rated in terms of mV/g or pC/g, it is valid only at one frequency, conventionally at 100 Hz."...
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5 votes
3 answers
586 views

Best microphone picking up sound within a small room?

I've tried several Electret Condenser Microphones as input to a generic USB audio sound card: MO064202-4 MO064402-4 MO064402-5 All mics work great at close range (about 1 or 2 inches). However, none ...
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3 votes
0 answers
279 views

nRF24L01+ module channel sensitivity and directivity

I want to start a project where I distribute many nRF24L01+ modules across the house. I am pretty sure someone has done that before. But before I wanted to begin I evaluated the modules using two ...
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1 answer
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wcs1800 current sensor (with sensitivity of 66mV/A) output voltage varies unexpectedly with a range of 10 - 20mA

I am using wcs1800 sensor to read current in the range of 100mA to 30A, even though the sensor has a sensitivity of ~66mV/A (5V input) and ~50mV/A (3.3v input) the output voltage is varied in the ...
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1 vote
1 answer
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Relationship between offset in electrical angle and BLDC motor performance

I am controlling a BLDC motor using Field Oriented Control (FOC). I use a 14-bit absolute encoder to read the rotor's position \$\theta_{m} \$, and use it to reconstruct the electrical angle \$\theta_{...
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1 vote
3 answers
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Characterization of RF Amplifier Chain

I am using a 3 Amplifiers chain for a Receiver system. The required Output is -32dBm while the sensitivity of the system is -55 dBm, I am able to achieve this. But the maximum I/P power for the ...
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0 votes
1 answer
124 views

Receiver Sensitivity

Receiver has noise figure 4 dB and ENBW 3.6 MHz. Used with antenna with noise temperature 200 K. Demodulator needs S/N of at least 13 dB. What is the receiver sensitivity? Give your answer in dBm, ...
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1 answer
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How to compute the sensitivity of this control system?

I am learning control systems on my own and am having some trouble understanding how Richard C. Dorf and Robert H. Bishop found \$S^{T}_{G}\$ in Modern Control Systems (12th edition): The problem: ...
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1 vote
2 answers
885 views

Influence of active area of photo diode on sensitivity

I am using a photodiode for detecting the laser. I have a question regarding the active area of the photodiode. Is smaller active area photodiode less sensitive? Or it totally depends on the laser ...
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1 vote
1 answer
74 views

Why radio exhibits better sensitivity with a wider deviation when Rx bandwidth remains constant

I used an RF generator transmitting FSK packets with a datarate of 50 kbps. The deviation was 12.5 kHz. With this combination of datarate and deviation the modulation index is 0.5. I found that my ...
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1 vote
2 answers
983 views

Understanding digital MEMS microphone sensitivity and obtained bits for a given input SPL

I'm trying to understand /simulate the communication between 2 smartphones by means of ultrasounds. As this is a general study I'm considering that the smartphones are equipped with the "typical" most ...
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3 votes
1 answer
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Can I connect multiple electret microphones for better gain?

Is it possible to connect multiple electret microphones in order to increase sensitivity (gain) of the microphone(s)? If yes, how do I connect them? Update: Obviously one solution is to increase the ...
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0 votes
2 answers
107 views

Noise figure of Microwave radio receiver

I always wondered why ADC is not considered for noise figure measurement in receiver chain? Do ADCs will not have much impact on noise figure in signal processing? How to derive a Noise figure spec ...
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3 votes
3 answers
3k views

How to reduce sensitivity of a Hall Effect Sensor?

In a mechanism with strong magnets, I want to use a Hall Effect Sensor to get the position of the magnets. The sensor move between two magnets in inverse polarity, so the field is minimum in on side, ...
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1 answer
160 views

IC's sensitivity

I'm trying to make an AM receiver using a certain IC (it's Samsung KA22427C, if you ask). I found a datasheet and in AM section of electrical characteristics there is entry for maximum sensitivity ...
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-1 votes
3 answers
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proteus pcb design - arranging sensitivity

I am so new in designing pcb, My problem is : putting buttons horizontally at the same level, What I do is : putting 2 buttons side by side, But they are not exactly at the same level, there is a ...
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2 answers
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What's the difference between sensitivity and resolution of an SMU?

In Keithley's Low Level Measurements Handbook, 7th ed the two terms are defined as: SENSITIVITY - the smallest change in the signal that can be detected. RESOLUTION - the smallest portion of ...
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