Differential Amplifier
The differential amplifier amplifies the ______ between two electrode inputs.
What is the difference?
EEG equipment typically has an input impedance of ______ to ______ MΩ.
What is 12–25 MΩ?
True amplifier gain is defined as ______ voltage divided by ______ voltage.
What is output / input?
The High Frequency Filter is also called the ______ filter.
What is a Low Pass filter?
Machine calibration uses what type of current?
What is direct current (DC)?
The ability of the amplifier to cancel out noise common to both inputs is called ______.
What is Common Mode Rejection?
Balanced and low electrode impedance ensures maximum transfer of what signal?
What is the EEG signal?
Sensitivity is expressed as ______ divided by ______.
What is voltage (µV) / amplitude (mm)?
The Low Frequency Filter is also called the ______ filter.
What is a High Pass filter?
Biocalibration uses what type of current?
What is alternating current (AC)?
According to guidelines, the acceptable CMRR is ______.
What is 10,000:1?
According to guidelines, electrode impedance should ideally be below ______ kΩ.
What is 5 kΩ?
Decreasing sensitivity makes ______ voltage activity easier to see.
What is high voltage activity?
Most labs start with a High Frequency Filter set at ______ Hz and a Low Frequency Filter at ______ Hz.
What is 70 Hz and 1 Hz?
The standard EEG paper speed is ______ mm/sec.
What is 30 mm/sec?
If Input 1 is -80 µV and Input 2 is -50 µV, what is the output difference?
What is -30 µV?
Impedance should not exceed ______ kΩ and must be balanced within ______ kΩ between inputs.
What is 10 kΩ; 5 kΩ?
If the amplitude is 5 mm and sensitivity is 10 µV/mm, what is the voltage?
What is 50 µV?
The 60 Hz filter is also called the ______ filter.
What is the Notch filter?
Which paper speed is best for visualizing spikes and fast activity?
What is 60 mm/sec?
If the difference is negative, the deflection goes ______ on the EEG.
What is upward?
True or False: It is better for all electrodes to be at 7 kΩ than to have some at 1 kΩ and others at 8
What is True?
If the sensitivity is set too high, how will low-voltage EEG activity appear on the recording?
What is larger (more visible) in amplitude?
Time constant measures how long it takes a calibration signal to decay or rise to what percentage of full scale amplitude?
What is 63%?
Which paper speed is most often used for neonatal and sleep studies?
What is 15 mm/sec?