Questions tagged [frequency]
How many times something happens per second, measured in Hz (hertz).
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What is the correct formula for the 3 dB frequency of an RC or LC Circuit?
Before we jump to another post where the formula is
I am reading through the text book Microelectronic Circuits 8th edition by SEDRA/SMITH. In the text, they show this table.
Here it shows the time ...
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Simple square wave frequency multiplier/divider
I have a square wave 0-12 V input signal that varies from 30-150 Hz, which I wish to multiply to an output square wave 0-12 V signal of 60-300 Hz. In this case, the multiplier is 2, however I ideally ...
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Need Help Increasing PWM Frequency from 800 Hz to 8000+ Hz for DC Motor Speed Control
I'm currently developing a speed control system for a powerful 12V DC motor that pulls a heavy load. To enhance system efficiency, I need to raise the PWM frequency from the 800 Hz (PLC upper limit) ...
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Gain depending to Frequency [closed]
This script sets up a server that listens for incoming connections. It reads audio data from the client in chunks of 1024 bytes, processes it using FFT (Fast Fourier Transform) with frequency-...
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Why does a MOSFET fail on fast signals, even if they're much longer than the turn on + turn off times?
When running at a fast signal, why does the MOSFET below not turn off, even when gate voltage is well below threshold (even negative)? Although the signal is fast (7 MHz, 140 ns period) it is < 1/...
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How can I determine how much power is in a frequency range via FFT in LTspice?
When using LTspice, I can see the FFT of a voltage. How can I see how much power is in a particular frequency band, and what portion of the total power it is?
The FFT in LTspice is in dB, but it's ...
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What does the standard deviation of TIE measurement tell me about my clock signal jitter?
When we take a Time Interval Error (TIE) measurement of a clock signal, we are presented with two measurement outputs, the mean error and the standard deviation. When I measured the TIE of a 32....
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Change analogWrite() frequency using the arduino framework for SAMD51
I am using Adafruit Feather M4 Express board which has Atmel SAMD51 controller on it. I am using platformio as IDE, which lets me use this controller using the Arduino framework.
I want to change the ...
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How to generate a 50-100 Hz 12 Vac sine wave for audio tone from 5 VDC (PB0 pin) atmega164p microcontroller [closed]
I have programmed to ATmega 164P to make PBO high when PC1 is low. In programming, I'm adding other peripherals as well.
But I am facing one issue regarding generating a tone. I have drawn low pass ...
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Oscilloscope Low Sampling at uHz Sinus Signal
I tried to measure a sinus signal at 1000 µHz with my R&S RTC1000 oscilloscope (bandwith 300 MHz). The function generator that I used was the EDU33212A. I set the T/div=100s and the oscilloscope ...
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How to modify frequency of an analog signal [closed]
I want to create my own pcb. First step is to design my circuit. I thought about a voice modifier.
So, in the breadboard I should put:
a microphone (an electrostatic electret microphone)
followed by ...
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When increasing the frequency of an induction motor can't I just add a capacitor to maintain torque instead of increasing the voltage?
When increasing the speed of an induction motor if one wants to maintain the same torque, the voltage has to be increased at the same proportion as the frequency of the AC supply.
This is because the ...
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Oscilloscope Total Record Samples Vs Signal Frequency
I have the oscilloscope R&S® RTC1000 at 300MHz / 2GS/s / 500Mpts (Mega Points) with 12 horizontal divisions on the screen.
1st Example:
If I have a signal 1Hz the total samples that the ...
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Having trouble with a 555 Astable timer outputting into NPN transistor switch that controls 741 Op-Amp
I have been building a circuit that takes the output of a 555 IC and outputs it into an NPN transistor that acts as a switch to toggle a 741 Op-Amp connected to an 8 ohm, 0.5 watt speaker.
I'm new to ...
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Why is the gain of the amplifier not considered in the frequency calculations? (Sedra and Smith 6th edition, Example 1.5)
In example 1.5 in Sedra & Smith 6th edition, the author's answer for item b) is 1 Mrad/s. To get this answer, the author considers the amplifier as a passive LP network and uses the time constant ...
