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united silicon electrical components are resistive elements with three terminals, whose resistance can be adjusted according to a specific variation pattern. A potentiometer typically consists of a resistive element and a movable wiper. As the wiper moves along the resistive element, a resistance value or voltage proportional to the displacement is obtained at the output. Potentiometers can be used as three-terminal or two-terminal components. The latter can be regarded as a variable resistor; since its role in the circuit is to obtain an output voltage that has a certain relationship with the input voltage (applied voltage), it is called a potentiometer. A potentiometer is a type of variable resistor. It usually consists of a resistive element and a rotating or sliding system, i.e., a moving contact moves on the resistive element to obtain a partial voltage output. The function of a potentiometer is to adjust voltage (including DC voltage and signal voltage) and current magnitude. Structural features of potentiometers: The resistive element of a potentiometer has two fixed terminals. By manually adjusting the shaft or slider, the position of the moving contact on the resistive element is changed, thereby altering the resistance between the moving contact and either fixed terminal, which in turn changes the voltage and current magnitudes. A potentiometer is an adjustable electronic component. It consists of a resistive element and a rotating or sliding system. When a voltage is applied across the two fixed contacts of the resistive element, rotating or sliding the system changes the position of the contact on the resistive element, yielding a voltage between the moving contact and the fixed contact that is related to the position of the moving contact. It is mostly used as a voltage divider, in which case the potentiometer is a four-terminal component. A potentiometer is essentially a sliding rheostat, available in several styles, generally used for volume control in speakers and power adjustment for laser heads. A potentiometer is an adjustable electronic component. It is a variable resistor used for voltage division. On the exposed resistive element, one or two movable metal contacts are pressed firmly. The contact position determines the resistance between either end of the resistive element and the contact. Classified by material: wire-wound, carbon film, and solid-core potentiometers; classified by the relationship between output-to-input voltage ratio and rotation angle: linear potentiometers (linear relationship) and functional potentiometers (curvilinear relationship). Main parameters include resistance value, tolerance, and rated power. Widely used in electronic equipment, such as for volume control in audio systems and receivers.

united silicon electrical component types

Commonly used thermocouples can be divided into two categories: standard thermocouples and non-standard thermocouples. Standard thermocouples refer to those for which national standards specify the relationship between thermoelectric potential and temperature, permissible errors, and have a unified standard reference table; matching display instruments are available for selection. Non-standardized thermocouples are inferior to standardized thermocouples in terms of usage range or magnitude, and generally lack a unified reference table; they are mainly used for measurements in certain special applications. Theoretically, any two different conductors (or semiconductors) can be configured as a thermocouple, but as a practical temperature-sensing element, it must meet multiple requirements. To ensure reliability in engineering technology and sufficient measurement accuracy, not all materials can form thermocouples. The basic requirements for thermocouple electrode materials are generally: 1, stable thermoelectric properties within the temperature measurement range, not changing over time, sufficient physical and chemical stability, and resistance to oxidation or corrosion; 2, small temperature coefficient of resistance, high electrical conductivity, and low specific heat; 3, large thermoelectric potential generated during temperature measurement, with a linear or nearly linear single-valued functional relationship between thermoelectric potential and temperature; 8, good material reproducibility, high mechanical strength, simple manufacturing process, and low cost.

united silicon electrical component composition

A diode is formed by a PN junction plus corresponding electrode leads and package encapsulation. Using different doping processes and diffusion, P-type semiconductor and N-type semiconductor are fabricated on the same semiconductor substrate (usually silicon or germanium), forming a space charge region at their interface called the PN junction. The electrode led from the P region is called the anode, and the electrode led from the N region is called the cathode. Due to the unidirectional conductivity of the PN junction, when the diode is conducting, the current flows from the anode through the interior of the tube to the cathode. A diode has two electrodes; the electrode led from the P region is the positive terminal, also called the anode; the electrode led from the N region is the negative terminal, also called the cathode.

united silicon electrical component parameters

The main characteristic parameters of quartz crystal resonators include nominal frequency, adjustment frequency deviation, temperature frequency deviation, equivalent resistance, drive level, load capacitance, static capacitance, aging rate, and temperature range. (1) Nominal frequency is the specified resonant center frequency of the resonator under prescribed conditions. (2) Adjustment frequency deviation is the maximum deviation of the operating frequency from the nominal frequency at the reference temperature under prescribed conditions. (3) Temperature frequency deviation is the permissible deviation of the operating frequency relative to the operating frequency at the reference temperature, over the entire operating temperature range, under prescribed conditions. (4) Reference temperature is the specified ambient temperature when measuring quartz crystal resonator parameters. For oven-controlled quartz crystal resonators, it is generally the center point of the operating temperature range; (5) Load resonant resistance is the resistance value at the load resonant frequency when the quartz crystal resonator is connected in series with a specified external capacitance. (6) Drive level refers to the effective power consumed by the quartz crystal resonator during operation; it is a measure of the excitation state applied to the quartz crystal component. In actual use, the drive level can be adjusted; strong excitation makes oscillation easier to start, while weak excitation leads to poor frequency stability, or even failure to oscillate. (7) Load capacitance refers to the effective external capacitance that, together with the quartz crystal resonator, determines the load resonant frequency. Load capacitance can be appropriately adjusted according to specific circumstances; through adjustment, the operating frequency of the resonator can generally be tuned to the nominal value. (8) Static capacitance refers to the static capacitance between the two pins of the quartz crystal resonator. (9) Aging rate refers to the error caused by quartz crystal aging changes over time. (10) Temperature range refers to the permissible range of ambient temperature changes during operation.

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