MMDT4126-7

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The MMDT4126-7 is a transistor array designed for voltage feedback amplifier applications, including use in portable devices such as digital cameras, phones, and tablets. It features dual output stages, with complementary outputs. This bipolar transistor array consists of a total of two NPN transistors, two PNP transistors, two diodes, and two active load elements, all in one package. It operates with a wide range of supply voltages (2.7V to 16V) and offers a wide range of gains (20 dB to +40 dB).

The MMDT4126-7 is composed of two transistors, one N-channel and one P-channel. They are used to provide current gain, amplifying the signal through voltage feedback. The two transistors share the same collector and they are interconnected so that they operate in a push-pull configuration. The output from one transistor is the complementary signal to the output of the other. By connecting the base of each transistor to the output of the other, a negative feedback loop is created, resulting in an amplified signal.

The MMDT4126-7 also features two active loads, which allow for the current limiting of each transistor. These active loads are connected to the collector of each transistor and control the current flow from the transistor’s collector to its base, thus limiting the maximum current that can be supplied to the base. This helps to protect the transistors from excessive current and prevents them from overheating.

Another feature of the MMDT4126-7 is the two diodes, which are connected in series between the two transistors. These diodes help to reduce the positive feedback between the two transistors, so that when one transistor is switched off, the other is not drawn into conduction. This increases the stability of the circuit and also helps to minimize unnecessary power losses.

Lastly, the MMDT4126-7 has a wide range of supply voltages and gains, allowing it to be used in many different types of applications. It is suitable for low power applications that require low levels of noise. It can also be used in applications that require high frequency response.

In conclusion, the MMDT4126-7 is a versatile transistor array designed for voltage feedback applications. It features two transistors, two active loads, and two diodes, all in one package. It has a wide range of supply voltages and gains, and is suitable for low power applications. It is an ideal solution for use in digital camera, phone and tablet applications.

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