CML Innovative electrical components German CML Innovative models CML Innovative prices

CML Innovative electrical components consist of wire wound turn by turn around an insulating tube. The wires are mutually insulated, and the insulating tube can be hollow or contain an iron core or magnetic powder core. Inductor coils are devices that operate based on the principle of electromagnetic induction. When current flows through a wire, it generates an electromagnetic field around the wire, and this electromagnetic field induces effects on the wire itself within the field range. The effect on the wire generating the electromagnetic field is called "self-inductance," meaning the changing current produced by the wire itself generates a changing magnetic field, which further affects the current in the wire; the effect on other wires within this electromagnetic field range is called "mutual inductance." The electrical characteristics of inductor coils are opposite to those of capacitors: "passing low frequencies and blocking high frequencies." High-frequency signals encounter significant resistance when passing through an inductor coil and struggle to pass through; whereas the resistance presented to low-frequency signals is relatively small, allowing them to pass through more easily. The resistance of an inductor coil to direct current is almost zero. Resistance, capacitance, and inductance all present certain resistance to the flow of electrical signals in a circuit, which we call "impedance." The impedance presented by an inductor coil to current signals utilizes the coil's self-inductance. Inductor coils are sometimes abbreviated as "inductance" or "coil," represented by the letter "L." When winding an inductor coil, the number of turns wound is generally referred to as the coil's "number of turns."

CML Innovative electrical component composition

The circuit board mainly consists of pads, vias, mounting holes, traces, components, connectors, copper pours, electrical boundaries, etc. (1) Pads: Metal holes used for soldering component pins. (2) Vias: Include metal vias and non-metal vias; metal vias are used to connect component pins between layers. (3) Mounting holes: Used to fix the circuit board. (4) Traces: Copper films of electrical networks used to connect component pins. (5) Connectors: Components used for connections between circuit boards. (6) Copper pours: Used for grounding networks, effectively reducing impedance. (7) Electrical boundaries: Used to determine the dimensions of the circuit board; no components on the board may exceed this boundary.

CML Innovative electrical component characteristics

(1) Volt-ampere characteristics: 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 called the diode's turn-on voltage, and the diode is in a fully conductive state; this voltage is usually called the diode's conduction voltage. For germanium diodes, when a reverse voltage is applied, 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, known as reverse breakdown, and this voltage is called the diode's reverse breakdown voltage. The breakdown voltage values of different diode models vary greatly, ranging from tens of volts to thousands of volts. (2) Forward characteristics: When a 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, the diode conducts forward, and the current rises rapidly with increasing voltage. Within the normal operating current range, the terminal voltage of the diode during conduction remains almost constant; this voltage is called the diode's forward voltage. 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 forward. This is called the threshold voltage or knee voltage. (3) Reverse characteristics: 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, and the diode's reverse saturation current 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. When the temperature rises, the semiconductor is thermally excited, the number of minority carriers increases, and the reverse saturation current also increases. (4) Breakdown characteristics: 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's reverse breakdown voltage. During electrical breakdown, the diode loses its unidirectional conductivity. If the diode does not overheat due to electrical breakdown, its unidirectional conductivity is not necessarily permanently destroyed; after removing the applied voltage, its performance can still recover; otherwise, the diode is damaged. Therefore, excessive reverse voltage applied to the diode should be avoided during use. Reverse breakdown is divided into Zener breakdown and avalanche breakdown based on the mechanism. In cases of high doping concentration, because the barrier region width is very small, a large reverse voltage destroys the covalent bond structure within the barrier region, freeing valence electrons from covalent bonds 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 width 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 under ambient temperature and 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 limit frequency for diode operation. Since the diode, like the PN junction, has 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, unidirectional conductivity will be affected. (9) Maximum rectified current: 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 flowing through the tube causes the chip to heat up and the temperature to rise, exceeding the permissible limit will cause the chip to overheat and fail. 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, the maximum reverse working voltage value is specified.

CML Innovative electrical component principles

Generators can convert mechanical energy into electrical energy, and dry cells can convert chemical energy into electrical energy. Generators and batteries themselves are not charged; their two poles have positive and negative charges respectively, generating voltage (current is formed by the directional movement of charges under the action of voltage). Charges already exist in conductors; to generate current, only voltage needs to be applied. When conductors are connected to the two poles of a battery, positive and negative charges are released to generate current. When the charges are exhausted, the charge is depleted, and the current (voltage) disappears. Dry cells and the like are called power sources. Devices that convert alternating current into direct current through transformers and rectifiers are called rectified power supplies. Electronic devices that can provide signals are called signal sources. Crystal transistors can amplify the signals sent from the previous stage and transmit the amplified signals to the subsequent circuits. Crystal transistors can also be regarded as signal sources for the subsequent circuits. Rectified power supplies and signal sources are sometimes also called power sources.

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