ETAwiki

Back to course information

Recommended reading: KonCEPT page 5-83 (chapter 1&2)

In this course sqrt(-1) is banned! We do not know how to derivate/integrate… and so on.

This first lesson covers all components except the most difficult one, the transmission line. It is covered in the antenna lesson.

• Ohms Law. U = RI, P=UI, thermal efficiency (mu).
• Resistors (R)
  • get hot
  • P = RI^2 = U^2/R
  • potentiometers
• Decibel: x dB = 10 log (power level / reference power level) = 10 log ( [voltage^2/R]/[ref voltage^2/R] ) = 20 log (voltage/ref voltage)
• AC/DC/frequency/period time/wavelength= 300 / f [MHz]
• Capacitors (C)
  • Z = 1/(2*pi*f*c)
  • Energy stored = C *V^2/2
  • Bleeder resistors
  • Polarization
• Inductors (L)
  • Z=2*pi*f*L
  • Energy stored = L*I^2/2
  • Use two-pole switches
  • Transformers
• Memristors are ignored
• Series and parallel connections of R/L/C
• Time domain and frequency domain → filters
  • Low pass RC or LC
  • High pass CR or CL
  • Band pass (L+C)
  • Band stop (L+C)
  • All-pass!?
• Resonance
  • parallel resonance
  • Series resonance
  • Q
  • Crystals
• Electron tubes
  • Diode
  • Triode
• Semiconductors
  • Diode
  • Zener diode
  • Bipolar transistor, PNP, NPN, current gain
  • MOSFET transistor, n-channel, p-channel.
• Rectification
  • u_peak_DC = u_rms_AC*sqrt(2) = u_peak_AC