DEVICE FOR FORMING OUTPUT SIGNAL OF CAPACITIVE PRESSURE PICKUP Russian patent published in 1996 - IPC

FIELD: measurement technology. SUBSTANCE: device has controlled generator 1 with adjusted amplitude, frequency divider 2, voltage restrictor 3, the first to the third two-position commutation switches 4-6, capacitive pressure pickup 7, which has measuring pressure dependent capacitor 8 and reference capacitor 9, which operation depends on temperature and other destabilizing factors. Device also has standard capacitor 10, operational amplifier 11, sync detector 12, additive correction unit 13, multiplicative correction unit 14, and integrating adder 15. EFFECT: reduced temperature error; widened functional capabilities. 1 dwg