Chee Hua How is a Senior Power Electronics Engineer who graduated with a BSEE from Coventry University, UK and MSEE from Mutimedia University, Malaysia. He has more than 18 years of working experience in designing analogue & power electronics circuits and debugging production mysterious circuit failures.
Chee Hua How
Chee Hua How
Areas of interest of the author: Measurement Supply Power
Publications on RadioLocman by the author Chee Hua How:
- Measure an optocoupler's CTRManufacturers of optocouplers characterize their devices for CTR (current-transfer ratio), and an optocoupler’s data sheet will list its CTR ranges. Unfortunately, the CTR range may be too wide for some applications, requiring you to screen incoming devices when you need a...25-07-2024
- Circuit remotely adjusts PSU voltageThis Design Idea demonstrates a way to adjust the output voltage of a power supply, for OVP/UVP testing, margin-testing the load, voltage programmability, or any other reason. The circuit in Figure 1 is capable of bidirectional trimming of a power supply’s output...10-10-2016
- Test Setup Checks Transistors' hFEs When Tight Control Is ImportantBench evaluation of transistors’ hFE may be needed during development of a system to ensure reliability of production systems. This circuit permits such testing using pulsed current and the biasing requirements set by transistor manufacturers. The spread of hFE values...31-05-2016
