| 摘要 |
{PG,1 A digital output capacitive transducer wherein two capacitors are used, one providing a reference current and the other providing a varying signal current. The signal current is obtained from an oscillator through a capacitor, which varies in capacitance as a function of the parameter to be measured. The reference current offsets the signal current to attain a known relationship between the sampled parameter and the signal current. The circuit has a small number of components and operates on a relatively low voltage with an accurate digital output.
|
