Busch Jaeger electrical components, German Busch Jaeger models, Busch Jaeger prices

Busch Jaeger electrical components refer to integrated circuits in which analog circuits composed of capacitors, resistors, transistors, and other elements are integrated to process analog signals. There are many analog integrated circuits, such as operational amplifiers, analog multipliers, phase-locked loops, and power management chips. The main constituent circuits of analog integrated circuits include amplifiers, filters, feedback circuits, reference source circuits, and switched-capacitor circuits. Analog integrated circuit design is mainly achieved through manual circuit debugging and simulation by experienced designers. In contrast, most digital integrated circuit designs are automatically synthesized under the control of EDA software using hardware description languages. Integrated circuits can be divided into two major categories based on their function and structure: digital IC and analog IC. Digital IC are used to generate, amplify, and process various digital signals (signals that vary discretely in time and amplitude). Analog IC are circuits used to generate, amplify, and process various analog signals (signals whose amplitude varies continuously with time). They are one of the core technologies of microelectronics, capable of acquiring, amplifying, comparing, converting, and modulating analog quantities such as voltage or current.

Busch Jaeger electrical component characteristics

Sensitivity refers to the ratio of the change in output to the change in input of a sensor under steady-state operating conditions. It is the slope of the output-input characteristic curve. If the relationship between the sensor's output and input is linear, then the sensitivity S is a constant. Otherwise, it will vary with changes in the input. The dimension of sensitivity is the ratio of the dimensions of the output and input quantities. When the dimensions of the sensor's output and input quantities are the same, sensitivity can be understood as the amplification factor. Increasing sensitivity can yield higher measurement accuracy. However, the higher the sensitivity, the narrower the measurement range, and often the poorer the stability.

Busch Jaeger electrical component principles

When a high-frequency current flows through a conductor, an electric field and a magnetic field are generated in the surrounding space. Based on the spatial distribution characteristics of the electromagnetic field, it can be divided into the near zone, intermediate zone, and far zone. Let R be the distance from a point in space to the conductor. The region where R ﹤﹤ λ/2π is called the near zone, where the electromagnetic field is closely linked to the current and voltage in the conductor. The region where R ﹥﹥ λ/2π is called the far zone, where the electromagnetic field can propagate away from the conductor into space. Its changes lag behind the current and voltage on the conductor by a certain period, and the propagated electromagnetic waves are no longer directly linked to the current and voltage on the wire. The electromagnetic field in this region is called the radiation field. It must be pointed out that when the length of the wire L is much smaller than the wavelength λ, radiation is very weak; when the length of the wire L increases to be comparable to the wavelength, the current on the wire increases significantly, thereby forming stronger radiation. Transmitting antennas utilize this property of the radiation field to allow transmitted signals to radiate fully into space after passing through the transmitting antenna. How can a conductor become an effective radiating system? Here we first analyze the situation on a transmission line. On a parallel two-wire transmission line, to ensure energy transmission without radiation, the two-wire structure must be symmetric, with currents at corresponding points on the lines equal in magnitude and opposite in direction, and the distance between the two lines<π. To effectively radiate the electromagnetic field, this symmetry of the transmission line must be broken. Methods such as separating the two conductors at a certain angle or removing one side can break the conductor symmetry and produce radiation. By separating the open-circuit transmission line or the conductor at a distance of π/4 from the terminal in a straight line, the current on the terminal conductor becomes in-phase rather than anti-phase, causing the radiation fields from that segment of the conductor to add in phase at spatial points, constituting an effective radiation system. This is the simplest and most basic unit antenna, known as a half-wave dipole antenna, with a characteristic impedance of 82Ω. After electromagnetic waves are radiated from the transmitting antenna, they propagate in all directions. If a symmetric dipole is placed in the direction of electromagnetic wave propagation, an induced electromotive force will be generated on the antenna dipole under the action of the electromagnetic wave. If the antenna is connected to receiving equipment at this time, a high-frequency current will be generated at the input end of the receiving equipment. Thus, the antenna acts as a receiver, converting electromagnetic waves into high-frequency current; in other words, the antenna functions as a receiving antenna. The quality of reception depends not only on the strength of the radio waves but also on the directivity of the antenna and the matching between the half-wave symmetric dipole and the receiving equipment.

Busch Jaeger electrical component characteristics

① Volt-ampere characteristic: When a forward voltage is applied to a diode, the current is extremely small when the voltage value is low. When the voltage exceeds a certain value, the current begins to increase exponentially. This is usually referred to as the turn-on voltage of the diode. When the diode is in a fully conducting state, this voltage is usually called the conduction voltage of the diode. For germanium diodes, when a reverse voltage is applied to the diode, the current is extremely small when the voltage value is low, and its value is the reverse saturation current. When the reverse voltage exceeds a certain value, the current increases sharply, which is called reverse breakdown, and this voltage is called the reverse breakdown voltage of the diode. The breakdown voltage values of different diode models vary greatly, ranging from tens of volts to thousands of volts. ② Forward characteristic: When an external forward voltage is applied, in the initial part of the forward characteristic, the forward voltage is very small and insufficient to overcome the blocking effect of the electric field within the PN junction, so the forward current is almost zero. This section is called the dead zone. The forward voltage that cannot make the diode conduct is called the dead-zone voltage. When the forward voltage is greater than the dead-zone voltage, the electric field within the PN junction is overcome, and the diode conducts in the forward direction, with the current rising rapidly as the voltage increases. Within the normal operating current range, the terminal voltage of the diode during conduction remains almost constant; this voltage is called the forward voltage of the diode. When the forward voltage across the diode exceeds a certain value, the internal electric field is quickly weakened, the characteristic current grows rapidly, and the diode conducts in the forward direction. This is called the threshold voltage or cut-in voltage. ③ Reverse characteristic: When the applied reverse voltage does not exceed a certain range, the current flowing through the diode is a reverse current formed by the drift motion of minority carriers. Since the reverse current is very small, the diode is in a cutoff state. This reverse current is also called reverse saturation current or leakage current. The reverse saturation current of a diode is greatly affected by temperature. Generally, the reverse current of silicon tubes is much smaller than that of germanium tubes. The reverse saturation current of low-power silicon tubes is in the order of nA, and that of low-power germanium tubes is in the order of μA. As the temperature rises, the semiconductor is heated and excited, the number of minority carriers increases, and the reverse saturation current also increases. ④ Breakdown characteristic: When the applied reverse voltage exceeds a certain value, the reverse current suddenly increases. This phenomenon is called electrical breakdown. The critical voltage causing electrical breakdown is called the diode reverse breakdown voltage. During electrical breakdown, the diode loses its unidirectional conductivity. If the diode does not overheat due to electrical breakdown, the unidirectional conductivity is not necessarily permanently destroyed. After removing the applied voltage, its performance can still recover; otherwise, the diode is damaged. Therefore, excessively high reverse voltage applied to the diode should be avoided during use. Reverse breakdown is divided into two types based on mechanism: Zener breakdown and avalanche breakdown. In cases of high doping concentration, because the width of the barrier region is very small, a large reverse voltage destroys the covalent bond structure within the barrier region, freeing valence electrons from covalent bond constraints and generating electron-hole pairs, causing the current to increase sharply. This breakdown is called Zener breakdown. If the doping concentration is lower and the barrier region is wider, Zener breakdown is less likely to occur. Another type of breakdown is avalanche breakdown. When the reverse voltage increases to a large value, the external electric field accelerates the electron drift speed, causing collisions with valence electrons in covalent bonds, knocking valence electrons out of covalent bonds and generating new electron-hole pairs. The newly generated electron-hole pairs are accelerated by the electric field and knock out other valence electrons, causing an avalanche-like increase in carriers and a sharp increase in current. This breakdown is called avalanche breakdown. Regardless of the type of breakdown, if the current is not limited, it may cause permanent damage to the PN junction. ⑤ Reverse current: Reverse current refers to the current flowing through the diode at room temperature and under the maximum reverse voltage. The smaller the reverse current, the better the unidirectional conductivity of the tube. It is worth noting that reverse current is closely related to temperature; the reverse current doubles. Therefore, silicon diodes have better stability at high temperatures than germanium diodes. ⑥ Dynamic resistance: The ratio of the change in voltage to the corresponding change in current near the static operating point of the diode characteristic curve. ⑦ Voltage temperature coefficient: The voltage temperature coefficient refers to the relative change in stable voltage for every one-degree Celsius increase in temperature. ⑧ Maximum operating frequency: The maximum operating frequency is the upper frequency limit for diode operation. Since the diode, like the PN junction, has a junction capacitance composed of barrier capacitance, the value of the maximum operating frequency mainly depends on the size of the PN junction capacitance. If this value is exceeded, the unidirectional conductivity will be affected. ⑨ Maximum rectified current: The maximum rectified current refers to the maximum allowable average forward current value when the diode operates continuously for a long period. Its value is related to the PN junction area and external heat dissipation conditions. Because current passing through the tube causes the core to heat up and the temperature to rise, exceeding the permissible limit will cause the core to overheat and become damaged. Therefore, under specified heat dissipation conditions, the diode should not exceed its maximum rectified current value during use.⑩ Maximum reverse working voltage: When the reverse voltage applied across the diode reaches a certain high value, the tube will break down and lose its unidirectional conductivity. To ensure safe operation, a maximum reverse working voltage value is specified.

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