3500/22M | BENTLY NEVADA | Stable discharge current

Description

3500/22M | BENTLY NEVADA | Stable discharge current

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Various glow discharge light sources, such as hydrogen and deuterium in spectrometers, xenon lamps and indium lamps in movie projectors, once ignited. The thin air inside the tube rapidly ionizes. Due to the instability of the ionization process and its constant tendency to increase, the current in the discharge tube will rise at any time. Therefore, when a constant voltage is applied to the lamp tube at 3500/22M, it is unstable and its current value may increase to the point where the lamp tube is damaged. In order to stabilize the discharge current and stabilize the working state of the lamp, it is best to use a constant current source for power supply.

The relationship between constant current and constant pressure is very close, and the two complement each other and can be transformed into each other. By passing a constant current through a set of precision resistors, a series of stable reference voltages can be obtained, especially low voltage references that are generally difficult to obtain. A simple voltage regulator composed of a constant current source and a voltage stabilizing tube greatly improves its voltage stabilizing performance. A constant current source can be used in many aspects of a series negative feedback stabilized power supply, which has significant effects on improving the stability of the power supply, reducing temperature drift, shortening the pre stabilization time, and simplifying the circuit structure.

A constant current source is one of the most commonly used circuit units in electronic circuits and analog integrated circuits. The main uses of 3500/22M are as follows: a. as a bias circuit, providing stable bias current to transistors and stabilizing the operating point; b. Using collector edge load can significantly increase the gain of the amplifier; c. In the level shifting circuit and differential amplifier dual input, The use of a constant current source in a single ended output circuit can reduce signal loss during transmission; d. The reference voltage circuit using a constant current source is an important component of the integrated voltage regulator.

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