Questions tagged [frequency]
How many times something happens per second, measured in Hz (hertz).
1,679 questions
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What Exactly Does “Linearity” Mean for Passive Components Like Inductors and Capacitors?
I’ve been reading about the concept of linearity in electronic devices such as resistors, capacitors, and inductors, and I want to make sure I understand it correctly.
From what I gather, when we say ...
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Why does a power grid need (finite) inertia?
Related to How well would a hypothetical electric grid with no inertial at all work?, but not the same.
Why not lock the frequency (and phase, now that we can) to an independent clock like, say, the ...
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How well would a hypothetical electric grid with no inertial at all work?
First the background for my question. So, in today's electric grids a lot of the power is produced with generators that are synchronized with the grid frequency. If there's a mismatch between the ...
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Angular frequency of the given signal
From the given graph, we can see the time period is "2". So ω (angular frequency) will be 2π/2, which gives angular frequency as "π".
But the textbook solution says the angular ...
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High-frequency coupling
If two wire-wound resistors are placed parallel with current passing through them at very high frequency, what is the impact of capacitive coupling between them?
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Making bandpass filter question
From here
Im making a bandpass filter such that
I want to make band pass range 40 to 400Hz such that at 40 and 400Hz value is -3dB. what centre freq and what values I should take for res,cap and etc. ...
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How can I reduce or remove close-in spurs in a direct digital frequency synthesizer (DDFS?)
I am working with a direct digital frequency synthesizer (DDFS) and I am observing close-in spurs near the carrier frequency in the output spectrum.
I understand that DDFS spurs can be caused by ...
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Verification of Clock Frequency and Duty Cycle Calculations for 2-Digit BCD Counter (555 + 4033)
I am currently designing a 2-digit BCD counter circuit using an IC 555 as the clock (Astable mode) connected to two IC 4033 (BCD Counter/Decoder) and Seven Segment Displays. I need expert verification ...
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Generating 40kHz, 60kHz, and 77.5kHz square waves with a single MCU's timers
I need to generate three square waves: 40kHz, 60kHz, and 77.5kHz.
40 and 60 are easy enough, but the only common multipliers with 77.5 don't seem to be widely available as oscillators. About the ...
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The meaning of \$e_n\$ and \$i_n\$ over frequency
Recently I bought a book: Chinese translation version of The art of electronics third edition.
Below text is from The art of electronics third edition.
Digital oscilloscopes have made it easy to ...
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Add fixed offset frequency to incoming signal
I have a project where the incoming signal is a sine wave that ranges from about 300 Hz to about 750 Hz. The client wants me to add a fixed offset frequency of about 185 Hz so that the output signal ...
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Bode Plot Analysis - Determine parameters
I'm designing a digital boost converter and need help analyzing this Bode plot. Could you please help me determine the following parameters:
Crossover Frequency
Phase Margin
Gain Margin
My conclusions ...
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Why is amplifier bandwidth defined at −3 dB?
Why is the voltage amplification factor of an amplifier or a filter generally expressed by its gain in decibels, and why is the bandwidth of this amplifier defined at −3 dB?
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Command to Several Slave using a Frequency Generator Master
I am generating varaiable Frequency and duty cycle PWM pulse using a master STM32F103C8T6 on PB4 pin (TIM3_CH1). The following shows my code:
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3-way Linkwitz Riley isolator adjustable high and low bands
I was wondering how I could adjust this circuit found here as "3-Way Mono LR Crossover" by Rod Elliot at Elliott Sound Products:
https://sound-au.com/project09.htm
to have adjustable high ...
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