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Resistor networks and arrays are essential components used in many circuit applications. They are found in a variety of electronic devices ranging from computers to communications systems. The specific application of these resistive components is determined by the application field and working principle associated with the particular type of the resistor network.

When it comes to resistor networks, the number of resistors and their size and shape are key factors in the device\'s application field. Common resistor networks include a network of three resistors, called a bridge circuit, and six resistors arranged in a circular arrangement, called a Kelvin network. The bridge circuit is useful in providing feedback and stability in circuits. It can be used to provide current gain, voltage gain, and frequency response. The Kelvin network is used to measure contact resistance and can be used for electrical isolation of components. Both resistors networks are used in a variety of applications including measuring equipment, communications systems, and automotive electronics.

Arrays, on the other hand, are typically used for applications in radio frequency (RF) and analog circuitry, including amplifiers and filters. An array consists of a number of resistors connected together in parallel. They are typically used to provide a uniform output signal to components in an analog device. Common resistive network arrays include an active circuit, which is used to provide an amplifier with a higher voltage gain, and an RF filter circuit, which is used to provide high-gain frequency response to a signal. The application field for resistive network arrays is determined by the size and shape of the array and the type of signal that the circuit is designed to filter.

The working principle of a resistor network or array is also important when it comes to determining its application field. Generally, a resistive network or array operates on the principle of electrical current flow between the components in a circuit. The components, usually resistors, are connected in such a way as to provide a path for current flow. The amount and direction of the current flow is determined by the design of the circuit, as the size and shape of the components and the arrangement of the circuit affect the current flow.

Resistor networks and arrays are used in a wide variety of applications, from consumer electronics to military applications. They provide circuits with feedback, balance, and current gain. They also serve to provide high gain frequency response for analog circuitry. Their working principle is based on electrical current flow and their application field can be determined by the size and shape of the array. Understanding the application field and working principle of these resistor networks and arrays is essential for engineers looking to use these devices in a variety of circuit applications.

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