SD1728

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SD1728 is a bipolar, RF transistor designed for use in a variety of RF applications. It is manufactured by NEC and features high input impedance, low noise, high-gain, and a wide range of operating frequencies. The device is suitable for use in RF power amplifiers, oscillators, transceivers, directional couplers, linear amplifiers, and high-power switching circuits. The SD1728 is also widely used in mobile communication systems and automotive applications.

The SD1728 is characterized by its low noise, its wide operating frequency ranges, and its excellent thermal stability. It has an input impedance of 2.6 ohms, with a low feedback capacitance of 0.7 pF. The device is capable of producing up to 70 dB of gain, with a 250 MHz bandwidth. The transistor’s optimal frequency range falls between 10 MHz and 600 MHz.

The SD1728 has a rated power output of 15 watts at a bias voltage of 40V. The device is capable of up to 20 watts at 50V. The SD1728 also has an excellent thermal stability, with a maximum deviation from 25ºC of less than 0.5%. This allows it to be used in applications that require reliable operation over wide temperature ranges.

The SD1728 is a common base transistor, meaning that the base terminal is used as the input and the collector terminal as the output. The emitter terminal serves as the reference for the base terminal. The SD1728 also features a dual-gate arrangement. The dual-gate arrangement provides a wide range of operating frequencies and improved RF stability, making the device well-suited for use in radio frequency applications.

In radio frequency applications, the SD1728 is commonly used to amplify or oscillate radio waves. The device is often used as an amplifier in superheterodyne receivers, where it amplifies both the intermediate and the final frequency stages. It is also used in directional couplers, where it is used to control the direction of an antenna’s radiation pattern. In high-power switching circuits, the SD1728 is used to rapidly switch an RF signal between two output devices.

The SD1728 is also widely used in mobile phones, where it is used as an oscillator in the power amplifier. The power amplifier is responsible for amplifying the input signal from the mobile phone in order to create a more powerful signal for transmission. Other applications for the SD1728 include RF transceivers, linear amplifiers, and automotive applications.

The SD1728 is a rugged, reliable, and cost-effective solution for a wide range of RF applications. It features excellent gain, low noise, high input impedance, and wide operating frequencies. Its dual-gate arrangement also provides improved stability for applications such as directional couplers and high-power switching circuits. The device is suitable for use in a variety of applications, including radio frequency amplifiers, oscillators, transceivers, linear amplifiers, and high-power switching circuits.

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