Advantages of Charge Amplifier | disadvantages of Charge Amplifier
This page covers advantages and disadvantages of Charge Amplifier. It mentions Charge Amplifier advantages or benefits and Charge Amplifier disadvantages or drawbacks.
Introduction:
The charge amplifier converts charge into voltage directly.
The figure-1 depicts circuit of charge amplifier.
Benefits or advantages of Charge Amplifier
Following are the benefits or advantages of Charge Amplifier:
➨Output voltage is proportional to charge produced by piezo-electric transducer.
➨Amount of charge present is not affected by cable capacitance.
➨Sensitivity (K) and time constant are independent of crystal capacitance and connecting cables.
➨Inductor is not required in the design.
➨Due to small size, smaller PCB area is needed.
➨It has moderate efficiency which is higher compare to
linear regulators.
➨Vout can be lower or higher than Vin.
➨It is lower in cost as few components are required in the design.
Drawbacks or disadvantages of Charge Amplifier
Following are the disadvantages of Charge Amplifier:
➨Switching process produces high output ripple and noise.
➨The capacity of output current is limited by
use of capacitors.
➨Low/moderate loads (which is less than 200 mA).
➨EMI (Electromagnetic Interference)
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