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RF Design,bipolar transistor

  • Measuring Bipolar Transistor ft with Fixed Base-Collector Voltage

    Recently I had a question from reader. He asked a good question: "How do you to measure a bipolar transistor's ft when the base-collector voltage, Vbc, is fixed?" Attached is a modified version of the testbench that allows a user to measure ft with a fixed Vbc. While the aesthetics are...
    Posted to RF Design (Weblog) by Art3 on Tue, Jun 12 2012
  • Measuring Fmax for MOS Transistors

    The following question has come up in comments: "How do I measure F max for an MOS transistor?" The measurement methodology -- testbench, analysis, calculator setup, stimulus, etc.-- does not change whether you are measuring bipolar transistors or MOS transistors. On the other hand, the results...
    Posted to RF Design (Weblog) by Art3 on Thu, Aug 11 2011
  • Simulating MOS Transistor ft

    One other question that you might ask is, this approach works for bipolars but what happens when you need to characterize a MOS transistor. Nothing changes, use the same testbench and measurements, see figure 1. In this testbench a MOS transistor is being compared to a bipolar transistor. Figure 1: MOS...
    Posted to RF Design (Weblog) by Art3 on Sat, Aug 9 2008
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