TSP #63 - Teardown & Analysis of a Keysight InfiniMax III N2802A 25GHz Active Probe
In this episode Shahriar takes a close look at one of Keysight (Agilent) InfiniMax III active probes. The model N2802A offers 25GHz of analog bandwidth, 17.5pS of rise time and a total differential input capacitance of 32fF at 10k-Ohm input impedance. The front-end amplifier of this active probe is designed in an in-house InP process, the same process responsible for the front-end of the X-Series Keysight oscilloscopes.
The teardown of the probe shows the control circuitry in the main probe body built around a PIC 16F877 microcontroller coupled to a DAC, EEPROM memory and various high-current and precision op-amps for biasing. The main front-end microwave module reveals the InP ASIC and supporting microwave circuity. There seems to be a dual-path design to provide a large DC common-mode offset capability as well as a high-bandwidth.
The Signal Path Blog
http://www.TheSignalPath.com
Видео TSP #63 - Teardown & Analysis of a Keysight InfiniMax III N2802A 25GHz Active Probe канала The Signal Path
The teardown of the probe shows the control circuitry in the main probe body built around a PIC 16F877 microcontroller coupled to a DAC, EEPROM memory and various high-current and precision op-amps for biasing. The main front-end microwave module reveals the InP ASIC and supporting microwave circuity. There seems to be a dual-path design to provide a large DC common-mode offset capability as well as a high-bandwidth.
The Signal Path Blog
http://www.TheSignalPath.com
Видео TSP #63 - Teardown & Analysis of a Keysight InfiniMax III N2802A 25GHz Active Probe канала The Signal Path
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