Hi, I have a voltage clamp problem in the below circuit, I am getting about 1v DC at Vin where I was expecting to see 0V Both D1 and D2 are bat85 diodes. when I replace d1 with a 1n4148 the voltage at Vin is at 0V. I'm Not sure on why this is happening. Vin is a half wave that varies from 0v to 10v.
hope some can shed some light on this for me.
Thanks
Cameron

note, pic is just a EWB sim but shows my problem:

 

The voltage you have seen is caused by the diode leakage current. If you parallel a 100K to the lower diode the voltage will reduced to insignificant.

If 1N4148 works, just use it.