Pressure transducer
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United States of America Patent
Stats
-
Dec 27, 1983
Grant Date -
N/A
app pub date -
Mar 25, 1981
filing date -
Mar 25, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pressure transducer (26) is disclosed. A multiplicity of signal plates (Cs, Cr, Csf, Crf) are disposed on a first quartz disc (88). Opposing the signal plates (Cs, Cr, Csf, Crf) across a gap formed by an annular frit (92) is a common plate (94) disposed on a second quartz disc (86). The signal plates (Cs, Cr, Csf, Crf) and common plate (94) form capacitors which are operable to modulate alternating excitation signals applied to the signal plates. The capacitances vary the modulation during deflections of the discs (86, 88) as a result of pressure changes, and the common plate (94) algebraically sums the modulated excitation signals into a single output from the transducer (26).
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