Figure 2-17---Simplified amplifier block diagram (direction or speed).

40.137

Figure 2-16.--Synchro signal converter and synchro signal isolation amplifier.

the input transformer. The signal is stepped down

one apply to the other. Each chassis consists of three

and fed into a transistor amplifier operating in the

channels that are the same in circuitry and

class B push-pull configuration.

operation; thus, the principles of operation of only one

channel will be explained. (See fig. 2-17.)

The input impedance of the amplifier is high, and

the output impedance is low. This condition prevents

The sine-wave output from the stator winding of an

any torque feedback from the output synchro (due to

external synchro is applied to the primary winding of

Figure 2-17---Simplified amplifier block diagram (direction or speed).

2-17