From 2001 to 2016, Rick Malley was the sole owner of Independent Designs, a small-scale custom electronic design and prototyping firm for clients with a limited budget.
He is currently employed by Wanco, Inc. in Arvada, Colorado.
Rick Mally
Rick Mally
Areas of interest of the author: Supply Power Analogue Design Measurement
Publications on RadioLocman by the author Rick Mally:
- Gate Drive Transformer Circuit Maintains Fast Turn-Off TimeWith their excellent isolation and reliability, gate-drive transformers (GDTs) are commonly used for driving half-bridge power circuits. However, they pose challenges when you want to have both switches off for an...Dec 15, 2021
- Simple Circuit Turns PWM Into A Digitally Adjustable Precision ReferenceThe circuit uses the ubiquitous LM431 shunt regulator to implement a second-order Sallen-Key low pass filter together with a level shifte. Designs frequently require the conversion of a microprocessor’s pulse...Jan 25, 2020
- AC power measurement uses PWM & PAMMeasurement of average power in a 60 Hz circuit (equivalent to VRMS × IRMS × cos(φ)) can be done by sampling the product of voltage and current and averaging. This requires four quadrant multiplication...Feb 14, 2016
- Two-IC circuit combines digital and analog signals to make multiplier circuitThe circuits presented here use an analog switch – such as a DG419 or one-third of a CD4053 – to combine an analog signal with a standard PWM signal. Most microcontrollers can easily generate the PWM signal....Aug 28, 2013
- LM555 Makes Inexpensive Power DriverVarious digital circuits require push-pull power drivers, particularly for gate and line driver applications. Many special-purpose devices are available for these issues, but they are typically expensive and...Jul 25, 2013
