Passive Devices

We’ve talked a lot here about PCBs.  But how important are they to electronics?  What other parts contribute to seamless way our electronic devices work and coordinate with each other?

PCB traces are metal wires connected between components.  The PCB material, on which the components and traces are placed, is made of insulator material), typically fiberglass with resin. This dielectric material can be of various kinds depending on the application of the circuit board.

Over the last few decades electronics technologies and product development have grown and rapidly have become more and more complex. Knowledge of electronic components is essential to build successful electronic products.

What other types of components go on a PCB?  One common type is passive devices .A passive device does not require energy to operate with the exception of an available alternate current circuit that its connected to.

Passive devices

This includes devices such as resistors, capacitors, inductors and crystals.

  • The resistor is a passive electrical component used to create resistance in the flow of electric current. In almost all electrical networks and electronic circuits they can be found. The resistance is measured in ohms.
  • capacitor (originally known as a condenser in the UK or cap for short) is a passive two-terminal electrical component used to store energy electrostatically in an electric field.
    • Examples of these are:
      • Surface mount capacitors
      • Multilayer Ceramic Capacitors
      • Cylindrical Capacitors
      • Three terminal capacitors
      • Wire-ended electrolytic capacitors
    • An inductor is a passive electronic component which is capable of storing electrical energy in the form of magnetic energy. It essentially uses a conductor that is wound into a coil. The inductor will induce a magnetic field in itself or in a core. It is conventionally said that it flows from south to north.
      • Examples of these are:
        • Iron Cored inductors
        • Variable inductors
        • Radio Frequency inductors
    • A quartz crystal wafer made from silicon is tightly fitted and controlled between two parallel metalized surfaces which make an electrical connection. It is used in oscillator circuit to provide a clock input to the processor device and is often a source of refence signals for radio frequency.
      • Crystals can be selected for the following:
        • Load capacitance
        • Fundamental frequency
        • Frequency tolerance
        • Frequency stability
        • ESR
        • Operating voltage

Next time, we’ll talk about active devices.

We know these parts are all critical to your build and lately we know they are harder and harder to find.  Reach out to us here at Spectrum Components and we can help you out.

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    Founded in 1972, AVX Corporation became a subsidiary of Kyocera in 1990. The company specializes in the manufacture of electronic components, including capacitors, connectors, and sensors, serving various industries worldwide.

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    Founded in 1930 as Geophysical Service Inc., Texas Instruments became a pioneer in semiconductor innovations, notably introducing the first commercial silicon transistor in 1954 and the integrated circuit in 1958. Today, TI is a global leader in analog and embedded processing technologies.

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    STMicroelectronics

    Established in 1987 through the merger of Italy's SGS Microelettronica and France's Thomson Semiconducteurs, STMicroelectronics has grown into Europe's largest semiconductor manufacturer. Headquartered in Switzerland, the company specializes in a broad range of electronics, from microcontrollers to power semiconductors.

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    Founded in 1976, Samtec is a privately held company specializing in electronic interconnect solutions. With a commitment to exceptional service and innovative products, Samtec offers a wide range of connectors, cables, and systems for diverse applications.

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    Established in 1938 by Frederick Krehbiel, Molex began by producing flowerpots from a plastic material called Molex. It has since evolved into a leading manufacturer of electronic connectors, serving industries such as automotive, consumer electronics, and data communications.

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    Founded in 1962 by Dr. Felix Zandman, Vishay started with the development of foil resistors and has grown through strategic acquisitions to become a global manufacturer of discrete semiconductors and passive electronic components.

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    Samsung began in 1938 as a trading company and entered the electronics industry in the late 1960s. Today, Samsung Electronics is a global powerhouse, leading in areas such as semiconductors, smartphones, and home appliances.

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    Established in 1983, Maxim Integrated developed analog and mixed-signal integrated circuits for a variety of applications. In 2021, it was acquired by Analog Devices, further expanding its reach in the semiconductor industry.

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    Founded in 1959, Diodes Incorporated has grown into a global manufacturer of discrete, analog, and mixed-signal semiconductors. The company serves the automotive, industrial, computing, and consumer electronics markets.

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