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Grounded resistor tunes oscillator: 05/29/03
EDN-Design Ideas / To vary the frequency of any
sine-wave oscillator, you should use a pair of
ganged variable resistors, and you should thoroughly
match their characteristics over the entire
variation range to satisfy the oscillator's
balancing conditions. This restriction leads to
problems in the tuning range and high cost, thereby
limiting the range of applications.... |
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Optimize linear sensor resolution: 03/07/2002
EDN - Design Ideas / A wide variety of sensors and
transducers of physical phenomena work via the
mechanism of variable resistance. These devices
sense temperature, light, pressure, humidity,
conductivity, and force, for example. Such sensors
measure the physical parameter of interest by
reading out the inherent parameter-sensitive
resistance or conductance. |
