PV32P200A02B00

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Trimmer potentiometers are often used to intermittently adjust the resistance level in circuits in order to finely adjust the circuitry for optimum performance. Commonly called trimmers, they offer a range of greater precision than simple variable resistors available, at the expense of having a reduced range of resistance levels. They are easy to adjust using a small screwdriver, and can be mounted directly to a circuit board. The PV32P200A02B00 is an example of a trimmer potentiometer, and will be discussed in terms of its application field and working principle.

The PV32P200A02B00 is a bandwidth and impedance adjusting trimmer. It is a type of trim pot, or multi-turn ceramic trimmer; as such, it is typically used in Radio Frequency (RF) applications requiring precision adjustment. It has a continuous track of resistive material – usually carbon or metal – etched onto a ceramic body, and is adjusted using a knob on the top. It has an adjustment capacitance range of 0.3pF-7pF, and offers a higher precision adjustment than other trim pots, meaning it can be used with more demanding applications. As it is designed for RF applications, it has very low contact resistance, and a high degree of stability when resistive adjustment is required.

Now we will look at the principle of operation of the PV32P200A02B00 trimmer potentiometer. It has two connections – the first is to ground, and the second is the adjustable terminal. When the knob on the top is turned, the resistance of the trimmer changes – this is achieved by moving the contact points (or tracks) on the ceramic body closer or further apart, so that different amounts of resistance are seen in the circuit. The adjustment capacitance is set by the trimmer moving a part of the ceramic body so that the plate separating the tracks has a different length. This motion between the tracks affects the capacitance by either adding or removing dielectric material to the circuit.

The PV32P200A02B00 trimmer pot is usually built onto a circuit board. Its working principle is simply to change or adjust the resistance in the circuit by moving the contact points (or tracks) of the ceramic body closer or further apart. It offers greater precision than other variable resistors, but has a reduced range of resistance levels. This makes it suitable for RF applications requiring precise adjustment.

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