Engineer Electronics case studies
Engineer Electronics · Put your knowledge to work in context.
The Engineer Electronics credential is a professional certification for electronics engineers who design, analyze, and maintain electronic circuits and systems. It signals to employers and clients that the holder has demonstrated competence across the core subdisciplines of the field. The Engineer Electronics case studies are 5 cases and about 3,349 words.
1High-Side N-MOSFET Actuator Driver Overheating
A production batch of 24 V industrial actuator boards uses an N-channel MOSFET as a high-side switch. The 24 V rail feeds a 2 A resistive-actuator load; the MOSFET source connects directly to the load, and the drain to +24 V.
708 words, about 4 min2Photodiode Transimpedance Amplifier Oscillation
A photodiode-based optical receiver uses a transimpedance amplifier with a 1 MΩ feedback resistor. The photodiode has 12 pF junction capacitance and is biased at zero volts; its cable adds 8 pF, and the op-amp input capacitance is 3 pF.
660 words, about 3 min3Hold-Time Failure After Clock-Buffer Change
A 100 MHz synchronous datapath in an FPGA connects two flip-flops with a 4.2 ns maximum and 0.55 ns minimum combinational delay. The launching flop has a maximum clock-to-Q of 0.35 ns and a minimum of 0.20 ns; the receiving flop has a 0.15 ns setup time and a 0.25 ns hold time.
652 words, about 3 min4Buck Converter Inductor Saturation at High Input
A 24 V-to-5 V buck converter delivers 2.5 A continuous at 500 kHz using a 4.7 µH inductor, two 22 µF ceramic output capacitors, and a current-mode controller. The inductor datasheet gives 4.0 A saturation at 25 °C, derated to 3.2 A at 100 °C, and 25 mΩ DCR.
678 words, about 3 min5Stuck I2C Bus After Sensor Brownout
A 3.3 V I2C bus runs at 400 kHz with one microcontroller master and seven sensors. The bus has 250 pF of measured capacitance and 4.7 kΩ pull-up resistors to 3.3 V.
651 words, about 3 min