Which of the following is not the characteristic of chopper amplifier pH meter?
A. Direct voltage from the electrodes is chopped at the main frequency
B. Using choppers for high-input resistance gives rise to spikes of waveforms at the output
C. It leads to stability in DC output of phase-sensitive rectifier
D. Magnitude of surge increases in the glass electrode output
Answer:C
Which of the following is not the characteristic of chopper amplifier pH meter?
A. Direct voltage from the electrodes is chopped at the main frequency B. Using choppers for high-input resistance gives rise to spikes of waveforms at the output C. It leads to stability in DC output of phase-sensitive rectifier D. Magnitude of surge increases in the glass electrode output
Explanation: The use of chopper amplifier in pH meter leads to zero instability. It leads to various other problems for high-input resistance.