Chopper stabilized dc amplifier type electronic voltmeter overcomes the effect of
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The dc output signal is then passed to a low pass filter to remove any residual ac component. This amplified drift free dc output is then applied to a PMMC movement for measurement.
The chopper eliminates the need for a high gain dc amplifier with its inherent drift and stability problems.
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Explanation:
The dc output signal is then passed to a low pass filter to remove any residual ac component. This amplified drift free dc output is then applied to a PMMC movement for measurement.
The chopper eliminates the need for a high gain dc amplifier with its inherent drift and stability problems.
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