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Resistor Networks, Arrays

Resistor networks, also known as resistor arrays, are electronic networks that are comprised of two or more resistors connected in parallel or series. These elements have a wide range of applications, including the transference of analog signals, protection of circuits, and the development of precision voltage supplies.

770103561 Application Field and Working Principle

Application Fields

Resistor networks are used in almost all electronic equipment. For example, they are found in power supplies, power amplifiers, measuring instruments, oscillators, signal processors, and phase detectors. In medical equipment applications, they are used in an array of sensors for patient monitoring, and in imaging applications, they are used for x-ray exposure control.

Resistor networks can also be used to create active electronic components, and as a simple example, an inverter made of two resistors in series can be created. When the power is applied, current flows through the resistor on the minus side of the power supply, and electrical signals are output through the resistors on the plus side.

Working Principle

Resistor networks are composed of two or more resistors, depending on the complexity of the device. The resistors are connected in parallel or series in order to create a desired electrical value. The resistance of the network depends on the total resistance of the resistors connected in the circuit, as well as the number of resistors used and the connections between them.

When an electric current passes through a resistor network, the current is spread over each resistor in the circuit. Thus, the total resistance of the circuit is equal to the sum of the individual resistances of the resistors. If resistors are connected in series, then the total resistance of the circuit is equal to the sum of the individual resistances; in the case of resistors connected in parallel, the total resistance is equal to the reciprocal of the sum of the individual resistances.

Advantages of Resistor Networks

Resistor networks offer a number of advantages over individual resistors, including cost savings, higher accuracy, thermal stability, and improved noise performance.

Cost Savings

Since resistor networks contain multiple resistors connected together, they offer the benefit of cost savings over individual resistors. Since the cost of buying multiple resistors is often significantly less than the cost of buying one resistor with the same value, it is typically more cost-effective to use a resistor network.

Higher Accuracy

Resistor networks offer higher accuracy than individual resistors do. This is because when resistors are connected in series or parallel, they act as a single unit and the resistance values of the individual resistors will be averaged. As a result, resistor networks provide higher accuracy than individual resistors.

Thermal Stability

Resistor networks are relatively stable to temperature changes. This is because when resistors are connected in series, the temperature coefficients of the individual resistors are averaged, providing more stability than an individual resistor would offer.

Improved Noise Performance

Resistor networks also offer improved noise performance over individual resistors. This is because when resistors are connected in series or parallel, they act as a single unit and the noise produced by the individual resistors is averaged. As a result, resistor networks offer improved noise performance over individual resistors.

Conclusion

Resistor networks, also known as resistor arrays, are electronic networks that are composed of two or more resistors connected in series or parallel in order to create a desired electrical value. Resistor networks have a wide range of applications and offer several advantages over individual resistors, including cost savings, higher accuracy, thermal stability, and improved noise performance.

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