Oscilloscope architecture has experienced decades of precipitation, especially the recent 20 years, the rapid development of digital oscilloscope has been basically stable, the contemporary digital oscilloscope mainly includes: the basic component of analog front end (responsible for signal disposal) - > AD converter (after signal digital) - > data acquisition/storage/signal processing - > display and man-machine interface.The first two parts determine most of the performance indexes of oscilloscope, which is also the core of oscilloscope.
Bandwidth with analog front end
Bandwidth, is the most basic parameters selecting oscilloscope, appeared in 2004 from 30 GHZ, to 45 GHZ, the wait for 5 years, during which to 60 GHZ oscilloscope appear only in just three years, and recently in the 12 months, oscilloscope, Arsenal have updated their top configuration oscilloscope, as if to remake the armies of the oscilloscope performance in 2002-2004.
The key to determine the bandwidth is the analog front end of the oscilloscope, including attenuator, amplifier and related circuits. It is the gate through which the measured signal enters the oscilloscope. The bandwidth of the test signal of the oscilloscope is determined by the bandwidth of the analog front end in many cases, which directly affects the background noise and range of the oscilloscope.The design of analog front end takes up more than half of the work in the hardware design of oscilloscope, and determines the hardware performance of oscilloscope to a large extent.