Hi,

The following application note is about building the Bridge Rectifier using MOSFETs. The link is as follows

I used the following Fair child MOSFETS to build the bridge

- FDS 9945
- NDS9948

Their data sheets can be found as follows

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I build the circuit according to circuit diagram 3. The input to the signal is 2 volts peak to peak sine wave but the output is half wave output not the full wave.

The output goes positive for the positive part of the sine wave but stays zero for the negative part of the input sine wave. I would appreciate any advice to solve this problem. The zener diode data sheet is as follows

Thanks John