Pole–Zero Analysis for Analog Circuits (Part 1)
Explains LTI transfer function representation and the effect of poles and zeros on magnitude and phase, with log-magnitude decomposition and real pole/zero behavior.
Analog Technology
Pole-Zero Analysis in Analog Circuits (Part 2)
Clarifies physical meaning of poles and zeros, Laplace vs Fourier transforms, why s=σ+jω is evaluated on jω for frequency response, and effects on stability.
How Transistors Work: BJT and MOSFET Differences
Practical guide to transistor operation covering BJT and MOSFET behavior, base-emitter and gate-source control, component selection, resistor sizing, and switching applications.
Op Amp Unity-Gain Bandwidth Calculation for MDACs
Analysis of MDAC settling and op-amp GBW requirements for pipeline ADCs, deriving settling error, closed-loop bandwidth, β influence, and clock-time allocation.
MOSFET Parasitic Capacitance Calculation
Guide to calculating MOSFET parasitic capacitance: deriving Cox from SiO2 permittivity/tox to compute gate capacitance (Cgg ≈ WL·Cox) and CGS/CGD behavior.
Do Pull-Up or Pull-Down Resistors Improve Drive Strength?
Examines whether a pull-up resistor can improve output drive, contrasting TTL asymmetry with CMOS driver behavior and open-drain bus trade-offs.
Measuring Common-Mode Inductance: Principles and Functions
Guide to measuring common-mode choke inductance: bridge, AC current, LCR, and self-resonant methods; principles, differential vs common-mode behavior.
Common Automotive IGBT Module Package Types
Technical overview of IGBT module design, packages, manufacturing steps and market suppliers for electric drive systems in new energy vehicles.
Transimpedance Amplifier: Function and Differences from Op Amps
Explains how a transimpedance amplifier converts photodiode current into a proportional voltage, covering feedback gain, frequency response, stability, and design considerations.
China's Leading IGBT Makers and Recent Capacity Expansions
Comprehensive analysis of China’s IGBT market: vendor technology generations, capacity expansion, automotive and photovoltaic applications, supply constraints and pricing.
Two Major Failure Mechanisms of IGBT Modules
Practical analysis of IGBT reliability and driver circuits: failure modes, transformer inter-winding capacitance coupling, grounding, and power integrity guidance for designers.
Chopper Op-Amp Technique in Bandgap References
Analysis of op-amp input offset (VOS) impact on bandgap reference VBG and chopper-based cancellation, folded-cascode effects, residual mismatch and notch filtering.
