Resource to calculate, building and measuring Hi Fi Loudspeakers and more...
Home
Email
Links
Audio Measurement Links
Loudspeakers
Tube Amplifiers
Audio Manufacturers
Headphone Manufacturers
Tweak Sites
Forums
DECWARE Audio Forums
Audioholics
Acoustics Forum
AudioCircle
AudioForums
AudioAsylum
FullRangeDriver.Com
HiFi-Forum (german)
Head-Fi: Covering Headphones, Earphones and Portable Audio
Techtalk at Parts-Express Forum
Tips
Articles
The Chain is as Strong as Its Weakest Link
Perceptual Study of Loudspeaker
Crossover Filters
Measuring
Thiele-Small Parameters
Measure PreAmp
Stepped Attenuator
CD Jitter + Timing
CD Jitter Problem
Jitter + Timing Errors
How many watts do I need?
Plasma Loudspeaker
Dipole Loudspeaker
Proper Signal Alignment
A great idea which falls...
Mains filtering: shocking!
The Worlds first True Subwoofer!
Stepped Attenuator
AC Power
Acoustic
Loudspeakers
History
Loudspeaker
Understand Frequency Response
Subwoofer Placement
Turntables
History
Turntable
Tonearm/Cartridge Capability
Phono Cartridge Specifications
Step-Up Transformer
Cleaning Vinyl
Compact Disc
History
CD's
DIY Cables
Interconnect
Power Cable
How to...
test a Capacitor
reanimate a dead
Electrolytic Capacitor
test a Transformer
measure cabinet vibrations
build a simple
Contact Microphon
"How It's Made"
Something about Espresso
Disclaimer
For Sale
Calculators
Loudspeakers
Loudspeaker Enclosure Plans
Recommended Minimum Wire Sizes for Loudspeaker Cables
TSP Database (ext.)
Loudspeaker Basics
History
Basics
What's are TSP?
Closed System
Bass Reflex
Passive Radiator
Onken Bass Reflex
Open Baffle
Transmission Line
TMLine Basics
TMLine Calculator
Horns
Bass Horn
Exponential Horn
Electrostatic Loudspeaker
Plasma Loudspeaker
Linkwitz Transformation
Transformation Basics
Transformation Calculations
Setting Up Speakers In A Rectangular Room
Measurements on Drivers
Analog
Computer
Acoustical
Electrical
How to measure Frequency Response
Nearfield
Farfield
Groundplane
Measurement Data for Simulation Programs
Stereo Polarity & Sweep Test
Loudspeaker Glossary
Projects
My System
My System
CD Master Clock Generator
Components explained
Recommended Records
Measurement Software
Calculate Tonearm/Cartridge Capability
Phono Cartridge Specifications
Acoustics
About Acoustics
Reflection control
The Chain is as Strong as Its Weakest Link
Diffusor Basics
Acoustical Measurement Basics
Acoustic Calculations
Acoustic Glossary
Absorbtion factors(Excel)
Specials
Audio Specials
Audio Pioneers
Friday, May 25, 2018
3194 users online
Tube Amplifier Power Supply Smoothing Factors Calculations
RC Filter Stage
The RC filter stage is the simplest in operation of all the filter stages.
This stage simply acts as a frequency selective voltage divider where the shunt impedance is frequency dependent.
Consider the following simple diagram.
At DC the capacitor is going to act as an open circuit and the DC output voltage will be the equal to the input voltage minus the voltage drop in R1.
But what about the AC voltage (ripple)? At AC the capacitor has a finite reactance given by the following relation.
X
_{c}
= 1 / (2 * Π * f * C)
Because we are using a full wave rectifier, the ripple frequency fr is equal to two times the mains frequency.
Using this information and the normal voltage divider relation, we can derive an equation for the smoothing factor
for this filter section. It is given in the following relation.
F
_{s}
= (2 * Π * f * R * C) + 1
Fr =
Hz
Rectifier Type =
Fullwave Rectifier
Halfwave Rectifier
Resistor =
Ohms
Capacitor =
uF
Ripple reduction factor =
Ripple reduction factor in dB =
dBv
Two identical RC Filter Stages :
LC Filter Stage
Fundamentally, this stage is very similar to the RC stage with the exception that the resistor has been replaced by an inductor.
However, the differences that this one change makes, are monumental.
The RC stage is called a "single pole" design. What this means is that its selectivity varies linearly with frequency.
The LC stage is a "two pole" design. This means that the selectivity of this stage varies with the square of frequency.
For this filter stage, the smoothing factor is as follows.
F
_{s}
= (2 * Π * f)^2 * L * C - 1
Fr =
Hz
Rectifier Type =
Fullwave Rectifier
Halfwave Rectifier
Inductor =
H
Capacitor =
uF
Ripple reduction factor =
Ripple reduction factor in dB =
dBv
Two identical LC Filter Stages :
No part of this website may be reproduced in any form without written or e-mail consent from the author.
The designs are free to use for private DIY-purposes only, commercial use is strictly prohibited.
Copyright mh-audio © 1999 - 2018