Precision accelerometers needs inverting mode amplifier since they are usually charge-output devices. This amplifier convert charges into voltage output. The circuit below is an example of accelerometer with DC servo.
The charge from the transducer is converted to a voltage by C1, which should equal the transducer capacitance plus the input capacitance of the op amp. The low frequency bandwidth of the amplifier will depend on the value of R1 • C1 (or R1 (1 + R2/R3) for a Tee network). The noise gain will be 1 + C1/CT. The time constant of the servo (1/R5C5) should be larger than the time constant of the amplifier (1/R1C1). [Schematic diagram source: Linear Technology Application Notes]
Possibly Related Articles:
- Hydrophone Pre-Amplifier
Hydrophone is similar with microphone, except that it is used in underwater environment. Off course a hydrophone can be used to pick up sound in air, but it will be... - Current Amplifier Using CA3140 Op-Amp
Current amplifier application need very low input bias current, and CA3140 is one of suitable op-amps for this purpose. The circuit's schematic diagram is shown in the figure below. In... - Feedback Amplifier Using Transistors
In designing small signal amplifier circuits, to achieve a specified amplifier gain we usually use opamp amplifier design to ease the setting of the gain. When the gain accuracy is... - Battery Powered Electret Microphone Pre-Amplifier
Here is a schematic diagram of electret microphone pre-amplifier using LMV721 op-amp. because the LMV721 has low noise and low power features, it would be an ideal choice for battery... - Gramophone Pre-Amp: A Pre-Amplifier with RIAA Response Curve
Recording Industry Association of Ameria (RIAA) has developed the recording standard of response curve for their recording. This curve is developed to optimize the gramophone recording response for lowest signal-to-noise...
| 
