National Instruments NI PCI-6110 User Manual
Page 96
Glossary
© National Instruments Corporation
G-3
C
C
Celsius
CalDAC
calibration DAC
CH
channel—pin or wire lead to which you apply or from which you read
the analog or digital signal. Analog signals can be single-ended or
differential. For digital signals, you group channels to form ports. Ports
usually consist of either four or eight digital channels.
channel rate
reciprocal of the interchannel delay
cm
centimeter
CMOS
complementary metal-oxide semiconductor
CMRR
common-mode rejection ratio—a measure of an instrument’s ability to
reject interference from a common-mode signal, usually expressed in
decibels (dB)
common-mode noise
unwanted signals that appear in equal phase and amplitude on both the
inverting and noninverting input in a differential measurement system.
Ideally, but not completely in practice, the measurement device ignores
this noise, because the measurement device is designed to respond to
the difference between the inverting and noninverting inputs.
common-mode range
the input range over which a circuit can handle a common-mode signal
common-mode signal
the mathematical average voltage, relative to the ground of the
computer, of the signals from a differential input
common-mode voltage
any voltage present at both instrumentation amplifier inputs with
respect to amplifier ground
CONVERT*
convert signal
counter/timer
a circuit that counts external pulses or clock pulses (timing)
CTR
counter