| 摘要 |
<p>An integrated charge amplifier circuit [100] for use with a MEMS gyroscope [20] or other device provides an improved low cut-off frequency with a DC stabilization circuit [130] while allowing large leakage current at the sensing node. The charge amplifier circuit includes a first amplifier [110] having a first amplifier input [112] and a first amplifier output [114]. A first capacitor [162] is coupled in parallel to the first amplifier, and the DC stabilization circuit is coupled in parallel to the first amplifier and in parallel to the first capacitor. The DC stabilization circuit includes an integrator [140] having an integrator input coupled to the first amplifier output, and an integrator output. An attenuator [150] having an attenuator input and output is coupled to the integrator output, and a first resistor [132] is coupled between the attenuator output, and the first amplifier input.</p> |
