581.
The voltage follower has a:
A
Closed-loop voltage gain of unity
B
Small open-loop voltage gain
C
Closed-loop bandwidth of zero
D
Large closed-loop output impedance
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The voltage follower has a:
Closed-loop voltage gain of unity
Small open-loop voltage gain
Closed-loop bandwidth of zero
Large closed-loop output impedance
A circuit whose output is proportional to the difference between the input signals is considered to be which type of amplifier?
Common-mode
Darlington
Differential
Operational
With negative feedback, the returning signal:
Aids the input signal
Is proportional to output current
Opposes the input signal
Is proportional to differential voltage gain
Op-amps used as high- and low-pass filter circuits employ which configuration?
Noninverting
Comparator
Open-loop
Inverting
Another name for a unity gain amplifier is:
Difference amplifier
Comparator
Single ended
Voltage follower
An ideal operational amplifier has
Infinite output impedance
Zero input impedance
Infinite bandwidth
All of the above
The result of MOV AL, 65 is to store
store 0100 0010 in AL
store 42H in AL
store 40H in AL
store 0100 0001 in AL
Which group of instructions do not affect the flags?
Arithmetic operations
Logic operations
Data transfer operations
Branch operations
Which microprocessor accepts the program written for 8086 without any changes?
8085
8086
8087
8088
A 20-bit address bus allows access to a memory of capacity
1 MB
2 MB
4 MB
8 MB
Which of the following is not an 8086/8088 general-purpose register?
Code segment (CS)
Data segment (DS)
Stack segment (SS)
Address segment (AS)
During a read operation the CPU fetches ________
a program instruction
another address
data itself
all of the above
Which of the following is not an arithmetic instruction?
INC (increment)
CMP (compare)
DEC (decrement)
ROL (rotate left)
A 20-bit address bus can locate ________
1,048,576 locations
2,097,152 locations
4,194,304 locations
8,388,608 locations
Which is not part of the execution unit (EU)?
Arithmetic logic unit (ALU)
Clock
General registers
Flags
Which is not an operand?
Variable
Register
Memory location
Assembler
Which microprocessor has multiplexed data and address lines?
8086
80286
80386
Pentium
The first microprocessor had a(n)________.
1 – bit data bus
2 – bit data bus
4 – bit data bus
8 – bit data bus
Which bus is bidirectional?
Address bus
Control bus
Data bus
None of the above
Which method bypasses the CPU for certain types of data transfer?
Software interrupts
Interrupt-driven I/O
Polled I/O
Direct memory access (DMA)