Introduction to Electronic Circuit

Electronic Circuit Design CHO, Yong Heui Introduction to Electronic Circuit

1. Diode Nonlinear device No voltage drop External circuits

i D = 0, v D ≤ V D0 i D = (v D - V D0 ) / r D , v D ≥ V D0 Piecewise linear model 1. Diode

Device structure 2. BJT Mode EBJ CBJ Cutoff Reverse Reverse Active Forward Reverse Rev. Act. Reverse Forward Saturation Forward Forward

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

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

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

Bias design
Assignment of AC and DC path
 4. Amplifier

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

SNR: signal to noise ratio
Noiseless system: NF = 1
Noisy system: NF > 1
Ground
 Noise figure (NF) 4. Amplifier

Simulation of LNA HP ADS (Advanced Design System) 
AC and DC path
 4. Amplifier

HPA (High Power Amplifier)
Output power (P1dB), power gain
Linearity (OIP3)
Efficiency (PAE)
Temperature
 Power amplifier scheme 4. Amplifier

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


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

Frequency conversion 
Mixer
VCO: Voltage Controlled Oscillator
PLL: Phase Locked Loop
TCXO: Temperature Compensated Crystal Oscillator
6. Mixer 출처 : RFDH.com

Introduction to Electronic Circuit

by Yong Heui Cho

Accessibility

Categories

Upload Details

Usage Rights

1 Embed 242

Statistics

Introduction to Electronic Circuit Presentation Transcript