We are trying to chopping the signal today.
The low noise amplifier can be used as bandpass filters for 10-100 HZ.
We are trying to figure out the signal squaring. The mixers in the lab only work for high frequency (> 500 KHZ).
Frank recommends us to use AD734 4-Quadrant multiplier.
We checked the electronics lab in Downs and 40 m and couldn't find it. We plan to order some AD734.
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