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Characterization of an RLC Low pass Filter

From Core Technology Group, Inc.
 

 
Inductor-capacitor low pass filters are utilized in systems such as audio amplifiers, speaker crossover circuits and switching power supply designs. Audio systems use low pass filters to bypass power supply noise and to control surge currents. Speaker crossover systems, because of their high power requirement use LC filters to block low frequency power surges to the midrange and high frequency speaker sections. In many cases, the output filter of a switching power supply must use a custom wound inductor with a standard capacitor for optimal design and efficiency. Because of this, the filter must be completely characterized with all values and parasitic effects accounted for to insure the stability of the feedback control system. The parasitic effects include the DC resistance of the inductor and the ESR of the capacitor.
Products & Services
Passive filters are implemented using only passive components such as resistors, capacitors and inductors. These filters do not produce any amplification of the input signal. Learn more about Passive Filters
Speakers produce and transmit sounds carried by electrical or radio signals.  This product category is primarily for industrial and OEM speakers rather than those for home use. Search by Specification | Learn more about Speakers
Active low pass filters pass signals from low frequencies and reject signals from high frequencies. Search by Specification | Learn more about Active Low Pass Filters
Active high pass filters pass signals from high frequencies and reject signals from low frequencies. Learn more about Active High Pass Filters
Active band pass filters are used to attenuate frequencies below and above a range of frequencies (i.e., the bandwidth or passband of the filter). Learn more about Active Band Pass Filters
Product Announcements
Syfer Technology Limited - Hermetically sealed EMI filters
Just announced by Syfer Technology is the SL range of EMI filters featuring hermetic construction, wound coil inductors and iron powder cores for improved insertion loss performance at high current... (read more)
AFP Transformers Corp - Harmonic Filter Inductors (Low and Medium Voltage)
AFP Transformers, LLC, designs and manufactures Harmonic Filter Inductors for the power factor correcting and harmonic suppression industry. When packaged with Power Factor Correcting Capacitors... (read more)
Lansdale Semiconductor, Inc. - Low Power VCO Buffer ML12149
The ML12149 is intended for applications requiring high frequency signal generation up to 1300 MHz. An external tank circuit is used to determine the desired frequency of operation. The VCO is... (read more)
GE ENERGY Filtration Technologies - The JuiceCan® Precipitator Power Maximizer
How it works The JuiceCan is basically a very special type of capacitor. It is "spiral wound" which provides very high internal inductance, so it can be thought of as two components in one: a... (read more)
Victrex plc. - APTIV™ black film delivers in acoustic speakers
APTIV™ black film in ATE's new P2C cone designs delivers superior performance for wide range of acoustic speakers. The inherent acoustic, high temperature, mechanical, fatigue and processing... (read more)
Filtronetics, Inc. - Band Pass Ceramic Filters
FILTRONETICS, Inc. can supply your band pass ceramic filters needs. Ceramic filters frequently offer high performance and low cost. Our Bandpass Ceramic Filters, Surface Mount Bandpass Filters, PC... (read more)
Topics of Interest
Overview A filter is used to selectively pass or attenuate a particular band of frequencies, and can be constructed of LC, RC, LCR, LR, or distributed components, and can be either active or passive... (Read More)
Ron Mancini Thomas Kugelstadt 22.1 Introduction What is a filter? A filter is a device that passes electric signals at certain frequencies or frequency ranges while preventing the... (Read More)
Steve Winder Note I don't use a real high-pass filter every year, but I do use some audio coupling capacitors, and I do use sample-and-difference circuits in my testing. And that's a form... (Read More)
By Victor Koren Overview From APPLIED MICROWAVE & WIRELESS VOL.12, NO. 9, SEPTEMBER 2000 This article discusses the design of a variable frequency band-pass filter with constant... (Read More)
Much of the current resonant converter development effort seems to be for half-bridge topologies, which will now be considered. The following discussion is based on a classic article by R. (Read More)
See more product announcements for Passive Filters
V.C.O HDM7160

V.C.O HDM7160
Shoulder Electronics Ltd.


Video Isolation Transformers -

Video Isolation Transformers -
North Hills Signal Processing


SAW FILTER HDF4177

SAW FILTER HDF4177
Shoulder Electronics Ltd.


11 See more product announcements for Passive Filters