Part # Application Note Medical Broadcast SD2932 AN1229 datasheet

Part Manufacturer: ST Microelectronics

ST Microelectronics

Part Description: SD2932 RF MOSFET for 300 W FM amplifier


Part Details:

AN1229 Application note SD2932 RF MOSFET for 300 W FM amplifier Introduction This application note gives a description of a broadband power amplifier operating over the frequency range 88 - 108 MHz using the new STMicroelectronics RF MOSFET transistor SD2932. Table 1. Typical achievable performances Parameter Performance Device 1 X SD2932 Frequency 88-108 MHz Vdd 50 V Idq 200 mA Pout 300 W Gain >19 dB Input return loss < -11 dB Drain efficiency >70% July 2007 Rev 3 1/7 www.st.com Amplifier design AN1229 1 Amplifier design 1.1 Input matching network Typical input gate-to-gate impedance of SD2932 at 100 MHz is Zin = Rs + jXs = 2 - 2.6 j, and can also be expressed as the combination of parallel resistance and reactance using the following formulas: Equation 1 Xs Rp = Rs · 1 ---- 2 + = 5.38 Rs Equation 2 XS X = R ---- / = ­4.14j P P R S


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Application Note Medical Broadcast SD2932 AN1229.pdf Datasheet