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Main characteristics of potentiometers
Date：2018-12-13
Views：1152
Main characteristics of potentiometers
Potentiometer is a resistor element with three lead-out terminals whose resistance value can be adjusted according to certain changing rules. The trimmer potentiometer is usually composed of resistor and movable brush. When the brush moves along the resistor, the resistance or voltage which is related to the displacement is obtained at the output end. The potentiometer can be used as either a three-terminal element or a two-terminal element. The latter can be regarded as a variable resistor.
What are the main characteristics of potentiometers?
1. The parameters and characteristics of trimmer potentiometer. The main characteristics of potentiometer are output function characteristics, coincidence, resolution and sliding noise. The nominal resistance, allowable deviation, rated power and resistance temperature coefficient of potentiometer are the same as those of resistor. The indicators of potentiometer include wear resistance life and starting moment.
2. Potentiometer output function characteristics. The functional relationship between the voltage ratio of bourns 3262 potentiometer (the ratio of output voltage to input voltage) and the stroke ratio (the ratio of brush to total stroke) is also called the law of resistance variation. There are three commonly used functional relationships: linear, exponential and logarithmic. In addition, there are sine, cosine and other forms suitable for special purposes.
3. Potentiometer conformity. The degree of deviation between the actual output function characteristics of bourns 3262 potentiometer and the theoretical value is expressed by the percentage of absolute difference between the actual output and the theoretical transmission. For linear potentiometers, the conformity is expressed by linearity, and its allowable deviation range is called linear accuracy.
4. Potentiometer resolution. The finest adjusting ability of the potentiometer to the output voltage or resistance represents the output change that can be produced by the smallest movement of the brush. It has an important influence on the adjustment accuracy of instrument or control system.
5. Sliding noise of bourns 3262 potentiometer. The irregular parasitic potential caused by the brush moving on the resistor (assuming there is no thermal noise and current noise), the sliding noise of the non-wire wound potentiometer is expressed by dynamic noise or smoothness, and the sliding noise of the wire wound potentiometer is expressed by the equivalent noise resistance.
As summarized above, the potentiometer's five main characteristics, I hope to help you understand the potentiometer.
What should the selective potentiometer pay attention to?
1. The high-power circuit uses the power type wire-wound potentiometer.
2. The direct sliding potentiometer can be used in the sound control system.
3. The reference voltage of the power supply circuit should be adjusted by a trimmer potentiometer.
4. The patch multi-loop potentiometer or single-loop potentiometer can be selected for potentiometers used in communication equipment and computers.
5. Carbon film potentiometer with rotary switch can be used for volume regulation and power switch of semiconductor radio.
6. High-precision wire-wound potentiometer, precision multi-loop potentiometer or metal glass glaze potentiometer should be selected in the circuit of precision instrument.
7. When choosing potentiometer, the resistor material, structure, type, specification and regulation mode of potentiometer should be selected according to the specific requirements of application circuit.
8. The reversed logarithmic potentiometer (formerly known as exponential potentiometer) should be used in the sound control potentiometer of audio equipment, and the logarithmic potentiometer should be used in the volume control potentiometer.
9. After choosing the types and specifications of potentiometers according to the requirements of equipment and circuit, the electrical parameters of potentiometers should be reasonably selected according to the requirements of circuit, including rated power, nominal resistance, allowable deviation, resolution, maximum operating voltage, dynamic noise, etc.
Potentiometer is a resistor element with three lead-out terminals whose resistance value can be adjusted according to certain changing rules. The trimmer potentiometer is usually composed of resistor and movable brush. When the brush moves along the resistor, the resistance or voltage which is related to the displacement is obtained at the output end. The potentiometer can be used as either a three-terminal element or a two-terminal element. The latter can be regarded as a variable resistor.
What are the main characteristics of potentiometers?
1. The parameters and characteristics of trimmer potentiometer. The main characteristics of potentiometer are output function characteristics, coincidence, resolution and sliding noise. The nominal resistance, allowable deviation, rated power and resistance temperature coefficient of potentiometer are the same as those of resistor. The indicators of potentiometer include wear resistance life and starting moment.
2. Potentiometer output function characteristics. The functional relationship between the voltage ratio of bourns 3262 potentiometer (the ratio of output voltage to input voltage) and the stroke ratio (the ratio of brush to total stroke) is also called the law of resistance variation. There are three commonly used functional relationships: linear, exponential and logarithmic. In addition, there are sine, cosine and other forms suitable for special purposes.
3. Potentiometer conformity. The degree of deviation between the actual output function characteristics of bourns 3262 potentiometer and the theoretical value is expressed by the percentage of absolute difference between the actual output and the theoretical transmission. For linear potentiometers, the conformity is expressed by linearity, and its allowable deviation range is called linear accuracy.
4. Potentiometer resolution. The finest adjusting ability of the potentiometer to the output voltage or resistance represents the output change that can be produced by the smallest movement of the brush. It has an important influence on the adjustment accuracy of instrument or control system.
5. Sliding noise of bourns 3262 potentiometer. The irregular parasitic potential caused by the brush moving on the resistor (assuming there is no thermal noise and current noise), the sliding noise of the non-wire wound potentiometer is expressed by dynamic noise or smoothness, and the sliding noise of the wire wound potentiometer is expressed by the equivalent noise resistance.
As summarized above, the potentiometer's five main characteristics, I hope to help you understand the potentiometer.
What should the selective potentiometer pay attention to?
1. The high-power circuit uses the power type wire-wound potentiometer.
2. The direct sliding potentiometer can be used in the sound control system.
3. The reference voltage of the power supply circuit should be adjusted by a trimmer potentiometer.
4. The patch multi-loop potentiometer or single-loop potentiometer can be selected for potentiometers used in communication equipment and computers.
5. Carbon film potentiometer with rotary switch can be used for volume regulation and power switch of semiconductor radio.
6. High-precision wire-wound potentiometer, precision multi-loop potentiometer or metal glass glaze potentiometer should be selected in the circuit of precision instrument.
7. When choosing potentiometer, the resistor material, structure, type, specification and regulation mode of potentiometer should be selected according to the specific requirements of application circuit.
8. The reversed logarithmic potentiometer (formerly known as exponential potentiometer) should be used in the sound control potentiometer of audio equipment, and the logarithmic potentiometer should be used in the volume control potentiometer.
9. After choosing the types and specifications of potentiometers according to the requirements of equipment and circuit, the electrical parameters of potentiometers should be reasonably selected according to the requirements of circuit, including rated power, nominal resistance, allowable deviation, resolution, maximum operating voltage, dynamic noise, etc.