Posts by wakibaki

Quote: Originally Posted by G.Trenchev  You'll get better results if running the buffers in high bias WB mode(with a jumper instead of resistor). Otherwise,I'm pretty sure that offset will be lower that 1 mV...

Thanks, I changed the sim. It makes little practical difference to the result, the 20 Hz residual is reduced to less than a volt, which is all to the good, since the threshold is 5V at the sampling point. Similarly the rise time...

OK, I've been looking at this a lot, the first thing is LTC1050 is only good for 16V total, it'll have to be LTC1150. Which is expensive. It also means some modifications to the circuit due to the reduced range of output swing...

Quote: Originally Posted by sek@  50 mV DC out of THE WIRE, which is basically the circuit at hand minus the servo. That's about 80 nW into a 32 Ohm headphone or 5 nW into 600 Ohm.  50mV in 32R is 78uW,...

If we take a 16 ohm headphone with 100dB/mW and we want to drive it to 100dB then the voltage across it is sqrt(0.001 * 16) = 126mV.   Then 1 LSB would be 0.126/(2^16) = ~2uV. (rms), 2.73uVpk.   So I think ideally we...

  Both circuits have gain virtually flat @ just over 1Hz, phase ~0 degrees by 10 Hz, I don't think the differences are anything to get excited about. It'll be a rare CD player having output (and a rare CD having content) @10Hz....

Is this a Proteus plot Kevin? Certainly looks like one. Where are the probe and stimulus placed?   Changing the resistor changes the range of servo authority as I understand it, i.e. the default resistor permits the servo to...

Quote: Originally Posted by WayTooCrazy  Oh yea, there it is... NICE!  What kind is it? It's a Maplin (Brit Company) variable temp item. A lot of people have given them poor reviews, but I like it. It's...

You can just make out my soldering iron on the floor near the lantern to the right of the keyboard...       w

Quote: Originally Posted by Avro_Arrow  I should add that Wakibaki is doing the board house quality board. I'm just doing an alternate (simpler) version. I don't want to seem like I am hijacking his...