Op amping the O2 sensor

[Tom Cloud]

>The quick answer - op amps can switch orders of magnitudes faster than
>an O2 sensor.  Where engines run in the millisecond world (like on time
>for fuel injectors), electronics are dealing in the nanosecond world
>(like propagation delays through a gate).
>
>Mark

this is far too general .... most use 741 op-amps, a wonderful
device in 1972 or so, when it replaced the dratted 709.  But,
it's long since been superseded by superior parts.  It has a
slew rate of .3 to .7 volts per microsecond with a large signal
bandwith of about 4 kC -- that means that it works okay at DC
and not worth a crap much above 5 to 10 kC -- and even worse
if loaded even slightly.

Tom Cloud

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