Information about Charge Amplifiers and Charge Converters

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About Charge Amplifiers and Charge Converters

Charge converters and charge amplifiers transform charge output signals with high-impedance to low-impedance voltage or current. Transducers connect piezoelectric, capacitive, or other charge-producing sensors to an amplifier that conditions the signal and outputs the voltage or current to a display such as a front panel, touch screen, or computer monitor. Charge converters and charge amplifiers are low-cost devices that are used in the measurement of variables such as acceleration, force, temperature, and dynamic pressure. Some charge converters and charge amplifiers include a voltage excitation supply or a current excitation supply that powers the sensor. Others include integral or pre-packaged sensors.

Products & Services Related to Charge Amplifiers and Charge Converters

Current Loop Converters

Current loop converters convert an analog or digital signal to a current loop output such as 4-20 mA or 0-20 mA.

Current-to-Voltage Converters

Current-to-voltage converters scale and convert current signal input to the desired output voltage range.

Data Acquisition Input Modules

Data acquisition input modules accept sensor and other signal output for data acquisition systems. They may include signal conditioning prior to the analog-to-digital conversion stage.

Data Acquisition Output Modules

Data acquisition output modules or cards transfer amplified, conditioned, or digitized signals.

LVDT and RVDT Signal Conditioners

Linear variable differential transformer (LVDT) and rotary variable differential transformer (RVDT) signal conditioners are devices that translate the linear or rotary movement of a ferromagnetic armature into an AC voltage that is proportional to the armature position.

Signal Converters

Signal converters contain inputs for one type of signal and outputs of another. Features can also include filtering and amplification or attenuation.

Voltage Converters and Voltage Inverters

Voltage converters and voltage inverters accept voltage input and provide a scaled voltage output. Conversion types include scaling up a low-level signal, voltage doubling, and inversion (converting a positive voltage to negative and vice versa).

Engineering Web: Charge Amplifiers and Charge Converters - Machine Design

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Three-Direction Force Sensor \| Machine Design Charge-output versions operate with inline charge converters or laboratory-style charge amplifiers.
Hot tips on IC temp sensors \| Machine Design As the RTD resistance changes, the time required to charge and discharge the capacitor varies, controlling the output frequency of the oscillator.
Power Semiconductors and ICs \| Machine Design Typical switching circuits include inverters, converters, voltage regulators, and relay and solenoid drivers.

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