
483
represent suitable sources of bias. Until the instantaneous signal
voltage exceeds + V
x
or V
2
neither diode is conducting and the
arrangement is a potential divider reducing the signal in the ratio
R
2
/R\
+ R2). R2 is not strictly necessary as a component but
represents the resistance of whatever is being fed, combined with the
leakage of the diodes if that is appreciable. R
x
should therefore not
be larger than it need be to make the resistance of the diodes when
conducting, plus their bias sources, negligible in comparison with it,
so that an appreciable fraction of what is supposed to be removed is
not developed across them.
That is th ...