Four terminal resistor, precision regulator for electronic components

In the field of electronic technology, four terminal resistors are a common electronic component that can help us achieve precise resistance control in circuits. A four terminal resistor typically consists of four pins, namely the positive, negative, middle, and ground pins. This design allows the four terminal resistor to function in different circuit environments, providing stable and reliable resistance values for the circuit. This article will provide a detailed introduction to the functions, applications, and selection methods of four terminal resistors

1、 The function of a four terminal resistor

1. Current limiting function: Four terminal resistors can be used to limit current and protect electronic devices from damage caused by excessive current. For example, in a power adapter, a four terminal resistor can be used to limit the output current and ensure proper device operation

2. Voltage divider function: The four terminal resistor can divide the voltage into different resistance values, thereby achieving precise control of the voltage in the circuit. For example, in an audio amplifier, a four terminal resistor can be used to adjust the output voltage of the amplifier, making the sound clearer

3. Load balancing function: Four terminal resistors can distribute the load in the circuit to different resistors, improving the stability of the circuit. For example, in LED strips, four terminal resistors can be used to balance the voltage difference between LEDs and extend the lifespan of the strip

4. Damping function: The four terminal resistor can absorb vibration energy in the circuit and reduce noise interference. For example, in microphone input signal processing circuits, four terminal resistors can be used to reduce the impact of high-frequency noise

2、 Application of Four Terminal Resistors

1. Power management: Four terminal resistors can be used for power management to achieve precise monitoring and protection of battery power. For example, in a mobile phone charger, a four terminal resistor can be used to detect the remaining battery level and avoid damage caused by overcharging

2. Wireless communication: Four terminal resistors can be used for debugging and maintenance of wireless communication equipment. For example, in a radio tuning circuit, a four terminal resistor can be used to adjust the antenna impedance and improve reception performance

3. Testing and Measurement: Four terminal resistors can be used for calibration and correction of various electronic measuring instruments. For example, in an oscilloscope, a four terminal resistor can be used to calibrate the zero offset of the vertical channel and improve measurement accuracy

3、 Selection method of four terminal resistor

1. Select the appropriate resistance range based on circuit requirements. Generally speaking, the resistance range of a four terminal resistor should be greater than or equal to the minimum resistance value in the circuit and less than or equal to the maximum resistance value. At the same time, factors such as the working environment temperature and humidity of the circuit also need to be considered

2. Choose a four terminal resistor with smaller tolerance. Due to the fact that four terminal resistors involve the connection of multiple pins, resistors with large tolerances may result in loose connections or poor contacts, affecting circuit performance. Therefore, it is recommended to choose high-quality four terminal resistors with smaller tolerances

3. Pay attention to the power tolerance of the four terminal resistor. Four terminal resistors of different specifications have different power bearing capacities, and the appropriate power level needs to be selected according to the actual requirements of the circuit during use

As an important component of electronic components, four terminal resistors play a crucial role in various electronic devices and circuits. Understanding its functions, applications, and selection methods can help us better utilize four terminal resistors to provide precise and stable performance support for circuits