National Instruments NI 4050 用户手册

ADC

analog-to-digital converter—an electronic device, often an integrated 
circuit, that converts an analog voltage to a digital number

ADC resolution

the resolution of the ADC, which is measured in bits. An ADC with16 bits 
has a higher resolution, and thus a higher degree of accuracy, than a 
12-bit ADC.

ADE

Application Development Environment

amplification

a type of signal conditioning that improves accuracy in the resulting 
digitized signal and reduces noise

amplitude flatness

a measure of how close to constant the gain of a circuit remains over a range 
of frequencies

aperture time

the period of time over which a measurement is averaged; also called the 
number of powerline cycles

attenuate

to reduce in magnitude

autozero

technique of internally shorting the internal circuit while disconnecting the 
measurement to compensate for temperature effects

b

bit—one binary digit, either 0 or 1

B

byte—eight related bits of data, an eight-bit binary number. Also used to 
denote the amount of memory required to store one byte of data.

bus

the group of conductors that interconnect individual circuitry in a computer. 
Typically, a bus is the expansion vehicle to which I/O or other devices are 
connected. Examples of PC buses are the PCI and ISA bus.

burden voltage

the voltage drop across the input section of the current mode

C

Celsius

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)