If the signal amplitude is not larger than the threshold of the diodes (about 0.7V for Si diode), then the diodes have no effect.mxrmxr wrote:Just been messing around with the British circuit, trying to add a couple of 1N4148 clipping diodes to GND at various parts of the circuit to see what effect they have. To my surprise they have no effect, no clipping what so ever !
Am I missing something here ? Apart from a brain
Try a pair of diodes with lower threshold, such as Ge or Schottky.
http://nerdbastards.com/wp-content/uplo ... 00x260.jpg
This only has the effect of clamping the signal to the supply rails in order to protect the CMOS inputs of the opamps.mxrmxr wrote:Should I be connecting them like the 2 protection diodes at the input & output, i.e. one connected to GND and the other to +V ?
http://www.edn.com/design/analog/437545 ... ion?page=2
A passive guitar should not be able to output that much power.