Last Test Flashcards
Most ICs are mounted on a printed circuit (PC) board with pins soldered to the copper traces of the PC board.
T
The major disadvantage of using sockets on a PC board is That they lower the cost of assembly.
F
An IC that malfunctions can be repaired.
F
An IC is tested in-circuit using the input/output method.
T
When plug-in sockets are used, replacing ICs is easier and quicker than checking external components.
T
An energized or “hot” circuit can be soldered.
F
The gain of an op amp can be controlled externally by connecting a feedback resistor between the input and ground.
F
The main purpose of an op amp is to amplify small signals to levels that can be used for the control of another device.
T
An op amp is never used in digital circuits that require the analog amplification of a weak signal.
F
Internally, an op amp has two major sections.
F
In a high-impedance differential amplifier, as long as the two input voltages (A and B) are either zero or equal in amplitude and polarity, the amplifier is balanced because the collector currents are equal.
T
Gain in an op amp is controlled by internal resistors that provide open-loop feedback.
F
OP amp gain is calculated by dividing the feedback resistor by the input resistor.
T
The two variations of the open-loop system are full control and partial control.
T
Many of the automated systems used in industry today are of the closed-loop type.
T
