Oscilloscope Amplifier P1dB vs. Current


  • Current = 20mA
  • Vcc = 12.0V
  • Amplifier output at minor clipping
  • Channel 1 Red = Collector DC Coupled
  • Channel 2 Blue = 50Ω Output
  • Collector Vp = 0.02A * 200Ω = 4V
  • Collector Vrms = 4V / 20.5 = 2.83Vrms
  • Output Vrms = 2.83Vrms / 2 = 1.41Vrms
  • Maximum power output = 1.412 / 50 * 1000 = 40mW
  • Maximum dBm output = 10 * Log(40) = 16dBm