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Introduction to Electronic Circuit

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Electronic circuits include a diode, a BJT (Bipolar Junction Transistor), and a FET (Field Effect Transistor). In this presentation, we briefly summarize the most important characteristics of the …

Electronic circuits include a diode, a BJT (Bipolar Junction Transistor), and a FET (Field Effect Transistor). In this presentation, we briefly summarize the most important characteristics of the diode, transistor, amplifier, filter, and mixer.

Published in: Technology, Business

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Transcript

  • 1. Electronic Circuit Design CHO, Yong Heui Introduction to Electronic Circuit
  • 2. 1. Diode Nonlinear device No voltage drop External circuits
  • 3. i D = 0, v D ≤ V D0 i D = (v D - V D0 ) / r D , v D ≥ V D0 Piecewise linear model 1. Diode
  • 4. Device structure 2. BJT Mode EBJ CBJ Cutoff Reverse Reverse Active Forward Reverse Rev. Act. Reverse Forward Saturation Forward Forward
  • 5. i C = I S e VBE/VT ·(1+v CE /V A ) I-V characteristics 2. BJT ∂ i C ∂ v CE r o ≡ v BE =constant -1
  • 6.
    • OP amp 의 어떤 terminal 도 ground 에 연결되어 있지 않음 .
    • 3 signal terminals and 2 power terminals (Not displayed)
    • D ifferential input voltage, single-ended output voltage
    • Infinite input impedance i i = 0
    • Zero output impedance
    • Zero common-mode gain (v2=v1  vo=0)
    • Infinite open-loop gain A
    • Infinite bandwidth : A is constant at any frequencies.
    *Differential input voltage, single-ended output voltage Ideal OP Amp 3. OP amp Ideal OP amp
  • 7. Selection of active device 4. Amplifier pHEMT amplifier with package
    • Gain [dB]
    • Bandwidth [Hz]
    • Stability: oscillation
    • Noise figure [dB]: LNA
    • P1dB [dBm]: PA
    • Characteristics of active device: bias
     Bare chip
  • 8. Bias design
    • Assignment of AC and DC path
     4. Amplifier
  • 9. LNA (Low Noise Amplifier)
    • Noise figure: 2 dB
    • Amplifier gain: 15 dB
    • Return loss: 15 dB
    • Reverse isolation: 20 dB
    • Impedance matching: power and noise
     4. Amplifier
  • 10.
    • SNR: signal to noise ratio
    • Noiseless system: NF = 1
    • Noisy system: NF > 1
    • Ground
     Noise figure (NF) 4. Amplifier
  • 11. Simulation of LNA HP ADS (Advanced Design System) 
    • AC and DC path
     4. Amplifier
  • 12. HPA (High Power Amplifier)
    • Output power (P1dB), power gain
    • Linearity (OIP3)
    • Efficiency (PAE)
    • Temperature
     Power amplifier scheme 4. Amplifier
  • 13. Characteristics 5. Filter
    • 2 port network: S parameters
    • Pass band and stop band
    • Return loss and insertion loss
    • Ripple and selectivity (skirt)
    • Pole and zero
    • Group delay
  • 14. Classification
    • LPF (Low Pass Filter)
    • HPF (High Pass Filter)
    • BPF (Band Pass Filter)
    • BSF (Band Stop Filter): notch filter
    • Duplexer: 2 BPF
    • Diplexer: LPF and HPF
     5. Filter
  • 15. Frequency conversion 
    • Mixer
    • VCO: Voltage Controlled Oscillator
    • PLL: Phase Locked Loop
    • TCXO: Temperature Compensated Crystal Oscillator
    6. Mixer 출처 : RFDH.com