Mike Wong is the director of applications engineering at Intersil Corp., Milpitas, Calif. He received a BSEE from the University of California, Davis. Email address: mwong@intersil.com
5 results found for Mike Wong, displaying items 1 - 5
October 2, 2008[Ideas For Design] Perform Coarse And Fine Correction With Less Costly Dual DCPS
DIGITALLY CONTROLLED POTENTIOMETERS (DCPS) find uses in a wide variety of systems for setting bias currents, variable reference voltages, and calibration settings. In industrial control and automation applications, high accuracy is a must. DCPs with 1024 taps are available, but for a few dollars instead of tens of cents. A dual, 32-tap, 50-k DCP is available for 40 cents. Can we use both of the DCPs in the package and reach similar performance to the 1024...
June 7, 2007[Ideas For Design] High-Speed Full-Wave Rectifier Requires No Diodes, Few Parts
Systems requiring power conversion and level detection employ full-wave rectification, traditionally provided by a diode bridge. But diode bridges consume a significant amount of board space and reduce signal amplitude. An alternative solution involves using separate amplification for the positive and negative half-cycles and a comparator to switch between them. This solution typically requires numerous ICs and can suffer from delay mismatch between the two...
February 1, 2007[Ideas For Design] Adding Feedback Boosts Peak Detector's Precision
The standard way to measure the peak of a signal involves the use of a diode. But if the diode is used alone, the input voltage must be significantly larger than the diode's turn-on voltage to obtain acceptable accuracy. Because turn-on voltages range from 200 mV in germanium diodes to 700 mV in silicon diodes, a simple diode peak detector requires an input voltage of 2 to 7 V, respectively, to achieve a 10% error. You can significantly improve resolution and accuracy in...
April 27, 2006[Ideas For Design] Reduce AC-Couupling Capacitance In Transmission Systems
Communication systems often require large ac output coupling to remove dc voltage on the transmission line and to isolate ground connections between transmit and receive systems. Generally, a feedback network is used to minimize the output capacitance. Yet once the feedback's tradeoffs are understood, the circuit can be reorganized and improved. The final feedback network presented here yields a more compact solution with equivalent performance. The traditional feedback network...
