user:kurser:ham_vt2023_l2
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ETA313-02: Theory lesson 1: Electric components
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
user/kurser/ham_vt2023_l2.1676220913.txt.gz · Last modified: 2023/02/12 16:55 by user