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ABC of CLR, EEE Components, INSPECTION, ELECTRICAL & VERIFICATION, PASSIVES, TESTING

Design of optimized EMC filters for real operating environments

  • Posted by doEEEt Media Group
  • On December 2, 2020
  • 0
A very convenient method of describing ferrite components is the use of measured dual-gate S parameters
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ABC of CLR, EEE Components, PASSIVES

Inductor Core Materials and Their Losses

  • Posted by Tomáš Zedníček
  • On November 5, 2020
  • 0
Core Materials And Their Losses. Introducing solids into a magnetic field, their behavior can be classified into three groups: diamagnetic materials / paramagnetic materials / ferromagnetic materials
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ABC of CLR, EEE Components, PASSIVES

Film and Foil Organic Dielectric Capacitors PP & PC

  • Posted by Tomáš Zedníček
  • On October 26, 2020
  • 0
Introduction Polypropylene (PP) is from a molecular point of view a non-polar dielectric with small losses and a relatively straight and moderate TC. Since the smallest film thickness is approx. 3.5 μm (0.14 mils) and εr ≈ 2.3 the capacitor can not come down to those sizes characterizing
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ABC of CLR, EEE Components, PASSIVES, PHYSICAL, MECHANICAL & ASSEMBLY, TESTING

Mounting Guidelines: Soldering, PCB Handling & Rework

  • Posted by Tomáš Zedníček
  • On October 18, 2020
  • 1
What are the optimum soldering conditions and solder fillet? The best solder fillet for all SMT applications is one which makes a reliable connection and which best withstands the environmental exposures of the products with minimum degradation. This fillet is difficult to describe quantitatively for all parts. The optimum fillet ranges in height from about 1/3 to 2/3 of the part termination height. This does not mean that all solder joints outside of this range should be repaired. It does mean that this is the target for the process engineer to reach for in his process. As many as possible of the solder fillets on the board should be in this range.
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ABC of CLR, EEE Components, PASSIVES, RF & MW

Inductance, Impedance, SFR and Losses in Inductors

  • Posted by Tomáš Zedníček
  • On October 4, 2020
  • 0
Inductance L Not only magnetic materials possess a magnetic field, but every current carrying conductor also creates a magnetic field itself. Energy can be temporarily stored in the magnetic field. This effect is technically exploited in coils, consisting of one or more wire windings. The synonymous term “inductor” has become established.
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ABC of CLR, EEE Components, PASSIVES

Factors in the Functionality of Transformer in Inductors

  • Posted by Tomáš Zedníček
  • On October 4, 2020
  • 0
EMC ferrites are based on Ni-Zn materials. This material has good quality factors (Q < 3) above approx. 20 MHz – i.e. trimmed for high losses. These originate in the core material and serve to absorb EMC interference. The inductance of these components is purposely kept low. Inductors however should show high quality factors, i.e. operate as loss-free as possible and buffer energy in the magnetic field. Also, they require stable inductance values over a wide frequency range. The distinction emphasized is reflected in the layout of the relevant manufacturer catalogue.
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ABC of CLR, EEE Components, PASSIVES

Dielectric Capacitor Insulation Resistance (IR)

  • Posted by Tomáš Zedníček
  • On August 27, 2020
  • 0
Insulation Resistance, IR The dielectric of a capacitor has a large area and a short length. Even if the material is a good isolator there always flows a certain current between the charged electrodes (the current increases exponentially with the temperature). This leakage can be described as a parallel resistance with a high value, an Insulation Resistance (Figure: Schematic of the Insulation Resistance IR in a capacitor.). We use the abbreviation IR in the following.
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ABC of CLR, EEE Components, PASSIVES

Definition of Capacitor Losses (ESR, Z, DF, Q)

  • Posted by Tomáš Zedníček
  • On August 17, 2020
  • 0
Losses Impedance and ESR A capacitor creates in AC circuits a resistance, the capacitive reactance (Formula C1-3). There is also certain inductance in the capacitor. In AC circuits it produces an inductive reactance that tries to neutralize the capacitive one. Finally the capacitor has resistive losses. Together these three elements produce the impedance, Z.
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ABC of CLR, EEE Components, PASSIVES

Ceramic Capacitors Class 2

  • Posted by doEEEt Media Group
  • On July 18, 2020
  • 0
Class 2 capacitors can be divided in: those with a moderate temperature dependence (X7R or 2C1) and others that only a fraction of the capacitance remains at the temperature limits (Z5U or 2F4).
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ABC of CLR, EEE Components, PASSIVES

Introduction to Ceramic Capacitors

  • Posted by doEEEt Media Group
  • On July 1, 2020
  • 0
Within the electrostatic capacitor family we can distinguish two groups: the organic film capacitors and capacitors with inorganic dielectrics. Capacitors with ceramic materials belong to inorganic dielectrics family
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