Dietzel electrical components Germany Dietzel model Dietzel price

Dietzel electrical component is a varactor diode, also known as a "variable reactance diode," manufactured using the characteristic that the junction capacitance of a PN junction under reverse bias varies with the applied voltage. As the reverse bias voltage increases, the junction capacitance decreases; conversely, it increases. The capacitance of a varactor diode is generally small, with a maximum value ranging from tens of pF to hundreds of pF. It is mainly used in high-frequency circuits for automatic tuning, frequency modulation, and phase adjustment, for example, as a variable capacitor in the tuning circuit of a television receiver. Main parameters include: zero-bias junction capacitance, zero-bias quality factor, reverse breakdown voltage, center reverse bias voltage, nominal capacitance, capacitance variation range (in picofarads), and cutoff frequency.

Dietzel electrical component characteristics

Resolution refers to the ability of a sensor to detect the smallest change in the measured quantity. That is, if the input changes slowly from a non-zero value, the sensor output will not change when the input change does not exceed a certain value, meaning the sensor cannot resolve this change in the input. The output changes only when the input change exceeds the resolution. Typically, the resolution at different points within the full-scale range of a sensor is not identical; therefore, the maximum change in input within the full scale that causes a step change in output is commonly used as the indicator for resolution. If the above indicator is expressed as a percentage of the full scale, it is referred to as resolution. Resolution has a negative correlation with sensor stability.

Dietzel electrical component structure

Three basic configurations of fiber optic sensor networks. There are three basic configurations of fiber optic sensor networks, one of which is called a single-point sensor. Here, a single fiber serves only for transmission. Another type is the multi-point sensor, where a single fiber connects many sensors in series, allowing multiple sensors to share a light source for networked monitoring. Then there is the intelligent fiber optic sensor. A multi-point fiber optic sensor appears externally as a section of grating, revealing periodic intervals under ultraviolet irradiation. When light is incident on the fiber, if the wavelength of the light equals twice the interval, the light wave will undergo strong reflection. If the fiber is subjected to temperature changes or strain, this reflected wavelength will change. Many such sensors can be made on a single fiber and connected for various sensing applications. Because optical fiber is flexible, it can be arranged in two or three dimensions, so the horizontal axis represents spatial position and the vertical axis represents the measurement object. What problem does such a sensor network solve? It solves the problem of determining what event occurred at which location and the intensity of that event, thereby providing two-dimensional information. This is the problem that intelligent fiber optic sensors need to address. They have very prominent requirements, including small size, high strength, good stability, embeddability in materials, resistance to electromagnetic interference, and environmental durability.

Dietzel electrical component principle

In information technology, digital integrated circuits are the mainstay, processing information carried by digital signals, which take discrete values in time and magnitude. However, signals in nature vary continuously in time and magnitude, such as wind sound and water flow; such signals are called analog signals. Correspondingly, circuits that process analog signals are called analog circuits, and integrated circuits used to process analog signals are called analog integrated circuits. Obviously, digital circuits cannot directly interface with the natural world; merely for the convenience of processing or transmission, and to fully utilize the advantages of digital systems, analog signals are first converted into digital signals, input into modern digital systems with large capacity, high speed, strong anti-interference capability, and good confidentiality for processing, and then reconverted into analog signals for output. The main component of integrated circuits is the transistor, and analog integrated circuits are no exception, except that they utilize the amplification effect of transistors, whereas digital integrated circuits utilize the switching effect of transistors. Early analog integrated circuits mostly used bipolar transistors. Due to the maturity of CMOS technology, the disadvantage of slow speed in early CMOS circuits was overcome, and it offers advantages such as low power consumption and convenient process upgrades (CMOS scaling). Today, analog integrated circuits and mixed-signal integrated circuits (integrating digital and analog circuits) are also commonly designed and implemented using CMOS.

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