Questions
61
___________ amplifier is used to drive the recorder.
Answer: Power amplifier
62
When a number of components are fabricated on same IC chip it is necessary to provide isolation between two different components for input interconnection is called __________
Answer: Input isolation
63
A chopper amplifier
Answer: Converts DC signal from low frequency to high frequency
64
Pre amplifier isolation in ECG circuit is to
Answer: Increase input impedance
66
Common mode rejection ratio is defined as ratio of
Answer: Differential mode gain to common mode gain
68
When the input of differential amplifier V1 = 0, then the differential amplifier is said to be operated in
Answer: Non inverting mode
69
When either one of the inputs to the differential amplifier is equal to zero then it is said to be operated in
Answer: Single ended mode
72
Using mechanical chopper we cannot achieve high chopping rates due to their
Answer: Inertia
74
A ————– is usually a display device used to produce a paper record of analog wave form.
Answer: Graphic pen recorder
75
The _________ of a recording system is the magnitude of input voltage required to produce a standard deflection in a recorded trace.
Answer: Sensitivity
76
A recorder is said to have good frequency response when the sensitivity of the system is _________ for all frequencies present in the signal.
Answer: Constant
77
In phase response of a recorder noise level ___________ with the band width of a system
Answer: Increases
80
Storage oscilloscope operates on the principle of
Answer: Secondary emission
