A pressure sensor assembly for use with an application specific integrated circuit, comprising: a) a capacitive sensor; b) a sensor coil operatively connected to the capacitive sensor to form a sensor L-C tank circuit; c) a measuring oscillator including a primary coil located within a second sensor compartment and spaced apart from the sensor coil; and d) a low frequency signal source configured to provide a low frequency signal to the measuring oscillator, e) the measuring oscillator further including a feedback circuit configured to provide a control signal for the measuring oscillator based upon an output of the measuring oscillator, f) wherein the capacitive sensor and the sensor coil are arranged within a first sensor compartment; characterized in that g1) the pressure sensor assembly comprises a system including the measuring oscillator and a control system: g2) the first sensor compartment being exposed to an environment to be sensed; wherein the measuring oscillator comprises: h) a variable gain operational transconductance amplifier gvOTA with a gain control input operably connected to the feedback circuit; an automatic gain control unit and a measuring oscillator L-C tank formed by a series connection of a first variable capacitor having a capacitance control input and a second capacitor in parallel to the primary coil, the automatic gain control unit being connected to the output of the gvOTA and to the gain control input of the gvOTA, and a first input (-) of the gvOTA being connected to the series connection of the first and second capacitor (218, 220); wherein i1) the output of the gvOTA is connected to a first end of the measuring oscillator L-C tank; and i2) a second input (+) of the gvOTA is connected to a ground and the second end of the measuring oscillator tank is connected through an AC path to the ground common to the gvOTA; wherein j) the gvOTA functions as a feedback voltage controlled current source with the feedback voltage control provided by the capacitive voltage divider of the first and second capacitor (220, 222) at the first input (-) of the gvOTA; k) the control system connected with the gain control input of the gvOTA and the capacitance control input of the first variable capacitor, wherein the control system is adapted to maintain the amplitude of the system constant by controlling the gain of the gvOTA and, if it senses a decrease of frequency, to provide a signal at the capacitance control input to reduce the capacitance of the first variable capacitor. a) a capacitive sensor; b) a sensor coil operatively connected to the capacitive sensor to form a sensor L-C tank circuit; c) a measuring oscillator including a primary coil located within a second sensor compartment and spaced apart from the sensor coil; and d) a low frequency signal source configured to provide a low frequency signal to the measuring oscillator, e) the measuring oscillator further including a feedback circuit configured to provide a control signal for the measuring oscillator based upon an output of the measuring oscillator, f) wherein the capacitive sensor and the sensor coil are arranged within a first sensor compartment; g1) the pressure sensor assembly comprises a system including the measuring oscillator and a control system: g2) the first sensor compartment being exposed to an environment to be sensed; wherein the measuring oscillator comprises: h) a variable gain operational transconductance amplifier gvOTA with a gain control input operably connected to the feedback circuit; an automatic gain control unit and a measuring oscillator L-C tank formed by a series connection of a first variable capacitor having a capacitance control input and a second capacitor in parallel to the primary coil, the automatic gain control unit being connected to the output of the gvOTA and to the gain control input of the gvOTA, and a first input (-) of the gvOTA being connected to the series connection of the first and second capacitor (218, 220); wherein i1) the output of the gvOTA is connected to a first end of the measuring oscillator L-C tank; and i2) a second input (+) of the gvOTA is connected to a ground and the second end of the measuring oscillator tank is connected through an AC path to the ground common to the gvOTA; wherein j) the gvOTA functions as a feedback voltage controlled current source with the feedback voltage control provided by the capacitive voltage divider of the first and second capacitor (220, 222) at the first input (-) of the gvOTA; k) the control system connected with the gain control input of the gvOTA and the capacitance control input of the first variable capacitor, wherein the control system is adapted to maintain the amplitude of the system constant by controlling the gain of the gvOTA and, if it senses a decrease of frequency, to provide a signal at the capacitance control input to reduce the capacitance of the first variable capacitor.