Questions tagged [loading-effect]
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Am I correct in solving this Loading in Voltage-Voltage Feedback
The following circuit is from Chapter 13 of Analog Design Essentials written by Willy Sansen.
Calculate \$R_{out}\$ for this circuit.
Break close loop with loading effect.
$$
(V_{in} - V_X) g_{m1} +...
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How can I break the feedback loop network and add loading effect
Here is the circuit schematic.
Consider Loading effect in feedback and break the loop.
Simplify the circuit.
$$A_{v,open} = \frac{V_{out}}{V_{in}} = -\frac{g_{m1} R_F R_D} {R_S +R_F}$$
Calculate \$...
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Choosing isolation resistor for Op-amp output
I want to choose an accurate value for an isolation resistor for my OP-AMP (OPA838).
Based on the datasheet, the OPA838 is very sensitive to capacitive loads and needs an isolation resistor added to ...
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Why is there a shift in cutoff frequencies of filters, and how to fix it?
I am doing a project where I am designing my own EEG circuit. I aim to keep it fairly simple and essentially design my circuit to do two things:
Amplification
Filtering
I want to design the circuit (...
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2
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How can I describe the loading effect of an ohmmeter?
How can I describe the loading effect in an ohmmeter? I've been given an assignment with this question, and I tried to look it up on the internet but could find no other material apart from loading ...
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Measurement of resistance of the Earth
From "Learning the Art of Electronics" by T. Hayes and P. Horowitz (Cambridge University Press, 2016):
If we attempt to use a digital multimeter to measure the resistance between A and B, ...
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1
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Why is the frequency response from my 1X and 10X probe seem to be converging with increasing frequency?
I'm a Mechanical Engineer trying to get into electronics so please excuse my lack of understanding.
I'm feeding a 5.0 Vpp sine wave into my SDS 1202X-E scope from my signal generator (see image below)....
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Loading effect of an op-amp as inverting amplifier
I have the following circuit, with an electret microphone and a TL082 op-amp:
I was asked to calculate the load effect of the amplifier. However, I don't understand: I thought that the whole point of ...
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How to know if an opamp can drive capacitive loads?
There has been a lot of questions about how to stablise opamp circuits driving capacitive loads. However, I know there are some op amps that are designed to drive capacitive loads but I am struggling ...
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How can I eliminate the paralleling effect of ADC input impedance at the output of sensor sense resistor?
I am using a sensor that gives 5V output However, the ADC I am using can sense only a 3.3V at absolute maximum. A very simple way of translating a 5V to 3.3V was to use a voltage divider as shown. ...
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Does the burden resistance at the output of a current sensor (either Hall effect or current) represent the output impedance of the sensor?
I need to measure current though a sensor and feed it to the ADC of a micro-controller. The ADC input voltage range does not match the sensor's output voltage range. I searched and found that op-amps ...
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How to reduce loading of JTAG lines by USB UART bridge using shared signals
I have a USB to TTL (UART bridge) that is connected permanently to a custom board with an ARM MCU. The UART lines are shared with the JTAG programming lines. The problem is that even without any ...
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Stick-Slip Piezo Linear Stage Driver - Prevent the Load from Changing Driver Output?
I am currently trying to develop a circuit that generates ramp waveforms to control the motion of a piezo linear stage.
Specifically, two waveforms need to be possible to output: a slow ~250us upward ...
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Fan speed slows down, the moment a new load is added
I am using a rectifier, and 4500uF capacitor to reduce the ripple. After connecting to the power source (60Hz, 120V), I was able to turn on the fan. The issue occurs when I turn the switch on to power ...
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Cascaded RC Bandpass filter loading problem?
So I calculated the Highpass stage output impedance to be 22kohm and the input impedance of the Lowpass stage is 430kohm when f=5khz, still in the output I am getting half of my supply voltage despite ...