Sensing circuit of a micro-electromechanical sensor

A microphone, comprising:

• an electromechanical sensor comprising a capacitive sense element comprising a first capacitive sense element node and a second capacitive sense element node;
• and
• a voltage-to-voltage converter comprising a voltage-to-voltage converter input and a voltage-to-voltage converter output, wherein the second capacitive sense element node is electrically coupled to the voltage-to-voltage converter input,
• wherein the voltage-to-voltage converter forms a negative feedback loop between the voltage-to-voltage converter output and the voltage-to-voltage converter input, wherein the negative feedback loop is electrically coupled, via a capacitive coupling, to the first capacitive sense element node, and wherein the voltage-to-voltage converter output represents acoustic pressure changes that have been sensed by the capacitive sense element.

A microphone, comprising:

• an electromechanical sensor comprising a capacitive sense element comprising a first capacitive sense element node and a second capacitive sense element node;
• and
• a voltage-to-voltage converter comprising a voltage-to-voltage converter input and a voltage-to-voltage converter output, wherein the second capacitive sense element node is electrically coupled to the voltage-to-voltage converter input, wherein the voltage-to-voltage converter forms a negative feedback loop between the voltage-to-voltage converter output and the voltage-to-voltage converter input, wherein the negative feedback loop is electrically coupled to the first capacitive sense element node, and
• wherein the voltage-to-voltage converter output represents acoustic pressure changes that have been sensed by the capacitive sense element.

A microphone, comprising:

• an electromechanical sensor comprising a capacitive sense element comprising a first capacitive sense element node and a second capacitive sense element node;
• a bias resistance that electrically couples a bias voltage to the second capacitive sense element node;
• and
• a voltage-to-voltage converter comprising a voltage-to-voltage converter input, a first voltage-to-voltage converter output, and a second voltage-to-voltage converter output, wherein the second capacitive sense element node is electrically coupled, via a blocking capacitor, to the voltage-to-voltage converter input, wherein the voltage-to-voltage converter forms a negative feedback loop between the first voltage-to-voltage converter output and the voltage-to-voltage converter input, wherein the negative feedback loop is electrically coupled to the first capacitive sense element node, wherein the voltage-to-voltage converter forms, via an amplifier comprising a gain that is greater than one, a positive feedback loop between the second voltage-to-voltage converter output and the voltage-to-voltage converter input, and wherein the positive feedback loop is electrically coupled, via a capacitive coupling, to the second capacitive sense element node.