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Last Updated:
June 02, 2021 01:44 PM |
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Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students & inventors:
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Calibrate scope jitter using a transmission-line loop - 09/20/01 EDN Design Ideas: Digital-clock-period jitter is the variation in the period of a clock cycle compared with a nominal (average of many cycles] clock period. To accurately measure period jitter using an oscilloscope, you must subtract the oscilloscope jitter from the measured jitter. However, oscilloscopes rarely have a jitter specification, so you must determine the oscilloscope jitter Design by David Cuthbert, Micron Technology, Boise, ID |
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Circuit improves on temperature measurement - 05/02/02 EDN Design Ideas: When current pulses with a stable iHiGH/iLOW ratio modulate a semiconductor junction, the ensuing voltage difference (for example, ΔVBE for a bipolar transistor] is a linear function of the absolute (Kelvin] temperature, T. You can use this truism to make accurate temperature measurements. Technical literature has thoroughly covered the relationship (references 1 to 4] and has numerou Design by Alexander Bell, Infosoft International Inc, Rego Park, NY |
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NCO technique helps µC produce clean analog signals - EDN-Design ideas – April 15, 1999 [ NOTE: FILE
has multiple design, scroll for this one.] A recent Design idea described a method for producing an analog voltage from one digital output of a µC ("Generate an analog signal with a µC, " EDN, Oct 22, 1998, pg 108). The method involves generating a PWM output with a controlled duty cycle and filtering the switching waveform with a simple single-pole RC filter. Although this method provide as an accurate dc output with 8 bits of resolution, it requires a filter with a low cutoff frequency to reduce the ripple to less than 1 LSB. Design by Steve Ploss, Veridian Corp, Wright Patterson AFB, OH
RF transmitter uses AM I encoding - 11/24/99 EDN Design Ideas: Although alternate-mark-inversion (AMi]encoding is well-suited for direct-conversion FM transmission, designers often overlook the technique. AMi, a three-phase, synchronous-encoding technique, uses bipolar pulses to represent logic ones and no signal to Design by Paul Sofianos |
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