More about measurement (211)

1-03-2001 | In previous articles in this series we have described an A/D converter based on a counter. A ‘real’ A/D converter, however, converts a volta...

1-02-2001 | In the previous instalment we measured capacitances and resistances. You may have wondered if this was all worth the effort, when accurate a...

1-01-2001 | So far in this series we have used the PC only with digital signals: switching, monitoring and counting. Now we turn to the analogue domain:...

1-12-2000 | This circuit is eminently suitable for adding bipolar input capability to the unipolar A/D converter of a microprocessor circuit (in a data...

1-11-2000 | It is often desirable to know how hot a part is. The usual method is to use a thermometer to measure the temperature, but this may not alway...

1-10-2000 | Computer systems in test environments are no longer a rarity. Many applications fall back on the use of a PC as test equipment and end up pr...

1-10-2000 | The OSCAR MP3 player is operated according to a new, intuitive concept which is vastly different from anything you’ve seen on conventional a...

1-07-2000 | In a switch-mode power supply, the quality of the output voltage depends strongly on the quality of the electrolytic capacitors that are use...

1-07-2000 | It’s always a bit difficult to measure the current in the positive lead of a power supply, such as a battery charger. Fortunately, special I...

1-07-2000 | This circuit is based on the configuration of a fifth-order Butterworth filter using only one opamp (see p 116 of the 1995 Summer Circuits i...