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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37 views

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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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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116 views

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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35 views

What is the meaning of the sensivity, of the open loop transfer function, being -1 regarding the non zero pole?

I have to calculate the sensivity of this transfer function regarding the pole s=-10. I used the formula below, and I got the value of -1 but I do not understand its meaning. I replaced (s+10) with p ...
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164 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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176 views

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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140 views

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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30 views

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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303 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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150 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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674 views

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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327 views

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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111 views

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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88 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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2k views

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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403 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 less active area photodiode is less sensitive? Or it totally depends on the laser ...
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61 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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410 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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1answer
962 views

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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95 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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861 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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100 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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430 views

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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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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88 views

sensitivity of ultrasound transducer related to output

Can any one explain to me how is the sensitivity of an uktrasound head related to the Output pressure Level?
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77 views

Forensics: electrostatic detection circuit for lifting “indentations” from documents

Wikipedia explains that an EDD: ...is a specialized piece of equipment [used to] reveal indentations or impressions in paper which may otherwise go unnoticed. The electro-physical basis whereby ...
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126 views

Lowering the output of high amp current sensor for low amp use - good or bad?

By increasing the value of burden resistor or turning the wire several times around the CT an output can be increased. But is it a good practise to lower the high current non-invasive current sensor ...
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153 views

Vacuum dessication of MSL components?

The standard method of removing moisture from MSL-sensitive SMD components prior to reflow is to bake in an oven for 12 hours or more. Without baking, there is a possibility of popcorning, as the ...
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215 views

minimum detectable signal of an IMU (MPU 6050)

I want to work with the MPU 6050 IMU, but before I have to check, which minimum detectable signal the IMU can measure or rather what is the lowest change of angle the IMU can measures. I have the ...
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2answers
923 views

US5881 Hall Effect sensor not detecting AC field

Yesterday I was disappointed to learn there is no magical IC to measure current flow in a standard appliance cord. On the advice I received, I went ahead with a US5881 Hall effect sensor and split ...
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7k views

Why is analog “voltmeter sensitivity” is defined as ohm/Volt?

What is the motivation to define a sensitivity of an analog voltmeter as ohm per voltage?
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What Colors or wavelengths are Photoresistors sensitive to?

Using a LDR or Photoresistor, are they more sensitive to one color or wavelength compared to another? Or are they consistent with any light? Why?
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137 views

EDIT: Dropping voltage of high frequency signal using diodes

I have a high frequency analog signal that has to be as noiseless as possible, say no ripple of a few millivolts? Now, I need to bring it down by almost 9V. Is it reasonable to simply use a zener or ...
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1answer
506 views

Normalize values from different MEMS 3-axis accelerometers

I have to find a solution to uniform values on 3-axis accelerometers on different android devices. I mean, a device with a specific accelerometer, subjected to the same acceleration, return values, ...
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313 views

Maximum achievable SNR (SNR before LNA)

I am trying to understand the concept of noise figure and the best achievable SNR. The noise figure is a measure how much a device degrades the SNR. Say I have a receiver with a NF of 16dB, then the ...
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165 views

Why is my piezo so innacurate? Is it just insensitive? [closed]

I'm trying to make a sound level display, simply to tell the user how loud nearby sounds are. The issue is this data, which I collected in a near silent environment (it's night, and I can't make out ...
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2k views

Sensitive or not sensitive gate? [closed]

If there is nothing about it in the datasheet, how can I find out if it is a sensitive or not sensitive gate?
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2k views

Maximum sensitivity of a wheatstone bridge [closed]

Four strain gages are placed on an elastic element in order to measure axial force and moment. Assume that element cross-section is square with area, A = h2 . The strain gages all have the same ...
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546 views

How does a consumer microphone achieve a sensitivity of -20 dB?

How does a consumer microphone achieve a sensitivity of -20 dB (Edutige EIM-001), when one of the best industrial electret microphones I could find (Primo EM158) has a sensitivity of only -32dB (1 kHz ...
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2answers
1k views

Image Sensor sensitivity

I am not sure what really the term "sensitivity" means when characterizing image sensors, so I will describe what I am looking for in the sensor at the following conditions: the exposure time is very ...
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6k views

BeagleBone Black - power supply sensitivity

I've bought a AC/DC adapter which per its specifications should output 5VDC and deliver 3A. I was going to use this adapter to power my BeagleBone Black (BBB) with. However, when I'm measuring the ...
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554 views

Understanding optical parameters of image sensors

I noticed that image sensor manufacturers provide some optical characteristics in different formats. I wish to know how to interpret that information. Sensitivity is characterized in \$\dfrac{V}{lx \...
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136 views

Compare optical Sensitivity of two sensors

I have two different sensors. Both have 16-bits ADC, both operate at Vdd = 3V, but their dynamic range is different. One has dynamic range of 50M:1 with gain range of x8 and the other has 500k:1 with ...
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187 views

Washing PCB for picoamp circuitry

I am possibly getting a problem with variation in performance between batches of boards that contain one area which is very current sensitive (to sub nanoamp). Could it be due to manufacturing residue ...