nwl electrical components, Germany nwl models, nwl prices

nwl electrical components are sensor resistors whose resistance changes with temperature. According to different temperature coefficients, they are divided into positive temperature coefficient thermistors and negative temperature coefficient thermistors. The resistance of a positive temperature coefficient thermistor increases as the temperature rises, while the resistance of a negative temperature coefficient thermistor decreases as the temperature rises; both belong to semiconductor devices.

nwl electrical component features

1. The function of a varactor diode is based on the principle that the capacitance between PN junctions is variable; it is a semiconductor device used as a variable capacitor in high-frequency tuning, communication, and other circuits. A varactor diode is a reverse-biased diode; changing the reverse bias voltage on its PN junction changes the PN junction capacitance. The higher the reverse bias voltage, the lower the junction capacitance; the relationship between reverse bias voltage and junction capacitance is nonlinear. 5. Diagram of the relationship between varactor diode capacitance and reverse bias voltage: (a) Increased reverse bias causes decreased capacitance; (b) Decreased reverse bias causes increased capacitance. The capacitance tolerance range is a specified capacitance range for a varactor diode. Datasheets will display minimum, nominal, and maximum values, which are often plotted on graphs.

nwl electrical component performance

The main performance indicators of loudspeakers include sensitivity, frequency response, rated power, rated impedance, directivity, and distortion. (1) Rated power: Loudspeaker power is distinguished into nominal power and maximum power. Nominal power, also called rated power or non-distortion power, refers to the maximum input power allowed within the rated non-distortion range of the loudspeaker; the power marked on the loudspeaker's label and technical manual is this value. Maximum power refers to the peak power the loudspeaker can withstand at any instant. (2) Rated impedance: Loudspeaker impedance is generally related to frequency. (3) Frequency response: When audio signals of the same voltage but different frequencies are applied to a loudspeaker, the resulting sound pressure will vary. Generally, the sound pressure is higher at mid-frequencies and lower at low and high frequencies. The frequency range of high and low tones where the sound pressure drops to a certain value relative to the mid-frequency is called the frequency response characteristic of the loudspeaker. (4) Distortion: Distortion is the phenomenon where a loudspeaker fails to faithfully reproduce the original sound. There are two types of distortion: frequency distortion and nonlinear distortion. Frequency distortion is caused by stronger reproduction of signals at certain frequencies and weaker reproduction at others, disrupting the original balance of high and low volume levels and altering the original timbre. Nonlinear distortion is caused by incomplete consistency between the vibration of the loudspeaker's vibration system and signal fluctuations, adding new frequency components to the output sound waves. (5) Directivity characteristics: Used to characterize the distribution of sound pressure radiated by the loudspeaker in various spatial directions; the higher the frequency, the narrower the directivity, and the larger the cone, the stronger the directivity.

nwl electrical component functions

(1) often compares sensor functions to the human 5 major sensory organs: photosensitive sensors - vision, acoustic sensors - hearing, gas-sensitive sensors - smell, chemical sensors - taste, pressure-sensitive, temperature-sensitive, and fluid sensors - touch. (2) Classification of sensitive elements: Physical category, based on physical effects such as force, heat, light, electricity, magnetism, and sound. Chemical category, based on the principles of chemical reactions. Biological category, based on molecular recognition functions such as enzymes, antibodies, and hormones. Usually, according to their basic sensing functions, they can be divided into ten major categories: thermal-sensitive elements, photosensitive elements, gas-sensitive elements, force-sensitive elements, magnetic-sensitive elements, humidity-sensitive elements, acoustic-sensitive elements, radiation-sensitive elements, color-sensitive elements, and taste-sensitive elements (some have also classified sensitive elements into 47 categories).

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