IV converter and inertial force sensor using IV converter

摘要

An IV converter includes a first operational amplifier connected to the capacitive component, a second operational amplifier connected to the first operational amplifier, and an impedance element connected to the second operational amplifier. The first operational amplifier includes a first input terminal connected to the capacitive component, a second input terminal connected to a reference potential, and first and second output terminals. The first output terminal is connected to the first input terminal to constitute a feedback loop. The second operational amplifier includes a third input terminal connected to the second output terminal, a fourth input terminal connected to a reference potential, and a third output terminal connected to the third input terminal via the impedance element to constitute a feedback loop. The phases of the currents output by the first and second output terminals of the first operational amplifier are substantially identical to each other.

主权项

1. An IV converter configures to convert a current flowing in a capacitive component into a voltage, the IV converter comprising:
a first operational amplifier configured to be connected to the capacitive component; a second operational amplifier connected to the first operational amplifier; and an impedance element connected to the second operational amplifier, wherein the first operational amplifier includes:
a first input terminal connected to the capacitive component;a second input terminal connected to a reference potential;a first output terminal connected to the first input terminal to constitute a feedback loop; anda second output terminal, wherein the second operational amplifier includes:
a third input terminal connected to the second output terminal;a fourth input terminal connected to a reference potential; anda third output terminal connected to the third input terminal via the impedance element to constitute a feedback loop, and wherein a phase of a current output from the second output terminal of the first operational amplifier is substantially identical to a phase of a current output from the first output terminal of the first operational amplifier.