Microsemi Corporation
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MRF904
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MRF904: RF Power Transistor

Basic Information Overview

  • Category: RF Power Transistor
  • Use: Amplification of radio frequency signals in high-power applications
  • Characteristics: High power gain, high efficiency, and wide frequency range
  • Package: TO-220AB package
  • Essence: Provides high power amplification for RF signals
  • Packaging/Quantity: Typically sold individually or in small quantities

Specifications

  • Frequency Range: 30 MHz to 512 MHz
  • Output Power: 100 Watts
  • Gain: 13 dB
  • Efficiency: 55%
  • Voltage: 28 V
  • Current: 1.5 A

Detailed Pin Configuration

  • Pin 1: Collector
  • Pin 2: Base
  • Pin 3: Emitter

Functional Features

  • High power gain allows for efficient amplification of RF signals
  • Wide frequency range enables versatile use in various applications
  • TO-220AB package provides easy mounting and heat dissipation

Advantages and Disadvantages

Advantages

  • High power gain
  • Wide frequency range
  • Efficient amplification
  • Easy mounting with TO-220AB package

Disadvantages

  • Limited output power compared to some alternative models
  • Higher current consumption compared to certain alternatives

Working Principles

The MRF904 operates based on the principles of bipolar junction transistors (BJTs). When a small input signal is applied to the base terminal, it controls the larger output current flowing between the collector and emitter terminals, effectively amplifying the RF signal.

Detailed Application Field Plans

The MRF904 is commonly used in: - Amateur radio amplifiers - FM broadcast transmitters - Industrial RF heating equipment - Laboratory RF testing equipment

Detailed and Complete Alternative Models

  • MRF901
  • MRF902
  • MRF903
  • MRF905

In conclusion, the MRF904 RF Power Transistor offers high power gain, wide frequency range, and efficient amplification for RF signals. Its TO-220AB package allows for easy mounting and heat dissipation. While it has advantages such as high power gain and wide frequency range, it also has limitations in output power and current consumption compared to some alternative models.

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Orodhesha maswali na majibu 10 ya kawaida yanayohusiana na utumiaji wa MRF904 katika suluhu za kiufundi

  1. What is the MRF904?

    • The MRF904 is a high-power RF transistor designed for use in applications such as amplifiers and transmitters.

  2. What is the maximum power output of the MRF904?

    • The MRF904 can deliver a maximum power output of around 100 watts in the frequency range of 470-860 MHz.

  3. What are the typical applications of the MRF904?

    • The MRF904 is commonly used in broadcast transmitters, land mobile radio systems, and other high-power RF amplification applications.

  4. What is the operating voltage and current for the MRF904?

    • The MRF904 typically operates at a voltage of 28 volts and draws a current of around 10 amperes.

  5. What are the key performance characteristics of the MRF904?

    • The MRF904 offers high gain, efficiency, and linearity, making it suitable for demanding RF power amplifier applications.

  6. What are the thermal considerations for using the MRF904?

    • Proper heat sinking and thermal management are crucial for ensuring the reliable operation of the MRF904, especially at high power levels.

  7. Are there any specific matching or biasing requirements for the MRF904?

    • Yes, the MRF904 may require careful impedance matching and biasing to achieve optimal performance and efficiency in a given application.

  8. Can the MRF904 be used in push-pull configurations?

    • Yes, the MRF904 is suitable for use in push-pull amplifier configurations to achieve higher output power and improved linearity.

  9. What are the typical failure modes of the MRF904?

    • Common failure modes include overvoltage, overcurrent, and excessive heat, which can lead to degradation or permanent damage to the transistor.

  10. Are there any recommended test procedures for validating the performance of the MRF904 in a specific application?

    • Yes, comprehensive testing, including RF performance, thermal stability, and reliability assessments, is recommended to ensure the proper functioning of the MRF904 in a given technical solution.