Patent ID: 7059192

Claim:
A pressure sensor of a high vacuum, comprising: a vibrating assembly ( 121 ; 221 ; 321 ) including a micro-electro-mechanical device (MEMS); a stationary supporting base ( 15 ; 15 ′) fastened to said vibrating assembly; an electrode ( 21 ; 21 ′), which makes said vibrating assembly to oscillate relative to said supporting base at a predetermined frequency and amplitude when a variable electric filed is produced between said electrode and said vibrating assembly; and a device detecting the deviations of the oscillation frequency and amplitude from said known frequency and amplitude, said device including an electric circuit with a MOSFET transistor (M, M 1 ), said vibrating assembly is a control electrode or gate (G) of said MOSFET transistor, which controls the width of a channel thereof depending on a value of said predetermined frequency and amplitude.