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This section provides an overview for current sources as well as their applications and principles. Also, please take a look at the list of 4 current source manufacturers and their company rankings.
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A constant-current power supply is a circuit that controls and delivers a steady output current. It is sometimes referred to as a constant-current source or a constant-current stabilized power supply. While DC constant-current power supplies are more common, AC versions are also available.
Used for powering LEDs, as their brightness is determined by the current. A stable current supply prevents brightness fluctuations and flickering.
Essential for charging rechargeable batteries, like lithium-ion batteries in smartphones, where a constant current is needed regardless of voltage variations.
Employed in powering sensor signals, converting resistivity changes into voltage changes for CPU interpretation. Examples include piezoelectric elements and resistance thermometers.
According to Kirchhoff's law, in a circuit with a power supply of electromotive force E and internal resistance r connected to a variable resistor R, the current value I is given by I = E / (R+r). A constant-current supply achieves a stable current (I ≈ E / r) by having an internal resistance r significantly larger than R.
Additionally, voltage and current sources are equivalently convertible. An ideal voltage source with electromotive force E and internal resistance r in series can be equivalent to a current source with the same internal resistance r in parallel.
Includes regulated DC power supplies with the ability to switch between constant voltage and constant current modes. Control methods vary between series regulators and switching power supplies, the latter being more efficient but generating more noise.
There are also output-isolated constant-current supplies, AC constant-current units, and AC-regulated power supplies, each suited for specific applications.
*Including some distributors, etc.
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Xi'an Aigtek Electronic Technology Co. Ltd., established in 2008, is a Chinese manufacturer based in Xi'an, Shaanxi, specializing in measuring instruments. With over 100 patents and software copyrights, the company offers preamplifiers, power amplifiers, and radio frequency (RF) power amplifiers. Its product range also includes signal generators, as well as current and voltage sources. Developed in collaboration with notable research institutions like Northwest Polytechnic University, these products find applications, among others, in signal amplification systems, material testing, and underwater acoustic testing systems.
DEXING MAGNET TECH. CO., LIMITED, founded in Xiamen, China, in 1985 is a manufacturer of Magnetometers, Teslameter, Gaussmeter and Fluxmeters. The company's product portfolio includes Hysteresis Graph Test System, Magnetic Field Tracer, Magnetic Field Distribution Tester, Vibrating Sample Magnetometer and Hall Effect Systems. Their products are used in research institutions, universities, and laboratories, medical and biotechnological research, such as MRI systems and bio magnetic measurements and aerospace and defense applications for navigation, magnetic anomaly detection, and calibration purposes.
Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
China
|
2 | 100.0% |
