Questions tagged [frequency]
How many times something happens per second, measured in Hz (hertz).
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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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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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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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Is this a good way to switch frequencies?
This is part of a bigger circuit where I have two frequencies coming from U1 and U2.
Sometimes I want U1 to go to U3 and sometimes U2 to go to U3. I have used a transistor pair to hopefully enable ...
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What RF connector is this?
I need help finding the PN for these Mating RF connectors. What manufacturer is it and what is the PN?
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JFET Frequency Response Problem
Dear friends please help me to sorts this out.
I have attempted to design a simple CS type amplifier for 27 MHz based on 2N5486 JFET. Pretty soon I realized that the 15 pF of input capacitance of my ...
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DC square high frequency to AC square high frequency
I don't know an easy way to do this with transistors. I have a digital square signal 40kHz (0-3.3), and I need transform that to an AC square signal 40kHz (-10 10 v), but it must not change the phase ...
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How to select a switching frequency for MOSFETs in a traction inverter?
When designing an inverter from scratch, what factors should be considered in selecting the switching frequency?
Specifically asking for: 20kW - 40kW traction inverters for motor control using SiC ...
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Why I get this output in the guitar tuner circuit I'm trying to make? (frequency to voltage converter)
I'm trying to design a guitar tuner. I made a Schmitt trigger to get a square wave, then connected it to a monostable multivibrator to generate a PWM signal. By using RC filter I should get clean ...
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Help Explaining Single Sideband (SSB) vs. Double Sideband (DSB) Diagrams
I am really struggling to understand intuitively what is happening in single vs double sideband. My textbook has provided some diagrams but extremely lackluster explanations, and was hoping someone ...
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Gowin 1K PLL Calculation Happy Accident
I have been trying to create a 6 MHz signal output from a 27 MHz system clock using a PLL on the Gowin 1K FPGA.
As can be seen ...
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MOSFET at high frequency with different loads
I simulated a MOSFET switching circuit at a frequency of about 300 kHz (with a duty cycle of 0.5) using two different load values (R1 = 0.1 kΩ and 1 kΩ), as shown in the diagram below. Am I correct in ...
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How is information loss prevented when changing signals from digital to analog?
I was reading about the different types of signals and how to represent them digitally.
I understood the following:
Most signals in the world are analog and in order to study them, filter them, or ...
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Frequency range for ESR of decoupling capacitor used in Xilinx FPGA
I am trying to do own PCB design based on Xilinx FPGA Zynq 7010. Their application note (UG933) provides recommended decoupling capacitor values with its ESR range, but they do not specific the ...
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Target Impedance in PDN
In this TI App Note, I would appreciate further clarification on a few key points, particularly regarding the concept of "Target Impedance" discussed on page 10.
As this note is focused on a ...
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Frequency of Crystal
I recently started working with a PIC18F board which has the following oscillator on it. My calculations indicate that it is a 16 Mhz oscillator but simulation points at 48 Mhz. If anyone can shed any ...
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Plot frequency vs voltage in LTspice
I am working on a voltage to frequency converter, which I would like to simulate in LTspice to achieve optimum conditions before I put it into practice. However, I cannot seem to find any resources ...
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How are frequency drops and surges handled in grids without spinning generators?
In most electric grids around the world frequencies of 50 or 60Hz are used. As I understand it the grids consumers run in parallel and grid resistance drops when another consumer is added. If voltage ...
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PCIe 4 and 5 GT/s characteristic, its connection to frequency [duplicate]
While designing a board that uses PCIe gen5 interface, I was wondering how exactly gen5 standart achieves double data speed comparing to gen4 (32GT/s PCIe5 and 16GT/s PCIe4)? Both 4 and 5 are 16ghz ...
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Nano VNA shows something that I don't understand
I have cable with connected 50 ohms resistance, the length is 54 cm. Why I have such a result?
Why is the first minimum on frequency 230 MHz, but lambda/2 = 65 cm?
If I connect 50 ohms resistance on ...
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This PCB from doppler radar from car to detect blind angles how are these traces made? [closed]
This PCB from Doppler radar from a car to detect blind angles
My question
How were these traces made?
From where it can learn to design a kind of board?
What essential do I need to learn?
Any course ...
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Buck converter frequency CCM DCM
I am trying to design a buck converter. And I was wondering what frequency I should be working on? I made a research and they saying in high voltages you should work with under 500kHz. But I couldn't ...
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Decoupling output of direct grid voltage class E amplifier
For a university project I'll implement some middle power (100 W) high frequency inverters (~500 kHz) with pulsed DC ~300 V DC output. The output current must be decoupled from the supplier grid due ...
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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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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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