.~ Combustion signal compared to reference signal varied by a condition of the engine {2}
35.05
.~.~ Automatic gain control or feedback control
DEFINITION
Classification: 73/35.05
Automatic gain control or feedback control:
(under subclass 35.03) Subject matter including either (a) an amplifier having a gain controlled by some condition of the engine or (b) a circuit arrangement comprising several stages including an earlier stage and a later stage wherein the later stage produces an output signal which is fed to the earlier stage of the arrangement for control purposes.