be identified by a Joint Army-Navy (JAN) designation marked on the
case of the transistor.
Always replace transistors with ones that
have the identical markings or a correct substitute. To ensure that
you use an identical replacement or correct substitute, consult the
5. Digital Circuits. Digital circuits have been employed in an ever
increasing number of applications. A digital circuit may operate as
an electronic switch and is capable of making decisions or logic.
Such a logic circuit represents a relationship between two or more
variable inputs and a resultant output. Digital logic circuits form
the basis for most types of computers.
Digital circuits use gates,
flip-flops, registers, and matrixes to perform a variety of
instruments as counters, registers, displays, and other logic
functions. Figure 1-44 illustrates a digital parallel counter.
Parallel Binary Counter.
equipment technical manuals will be much more complex than the simple
circuits illustrated in this lesson thus far.
Most circuits are a
combination of the simpler circuits, arranged in a configuration to
provide a series of electrical events, in order to produce some
desired output or outputs.
Figure 1-45 illustrates such a circuit.
Input signals are introduced into the circuit through plug P1,
processed through a series of electrical and electronic components,
and output, again through plug P1.